AU2015361631B9 - Surface treating agent for hot-dip aluminum-zinc steel plate, and hot-dip aluminum-zinc steel plate and manufacturing method therefor - Google Patents
Surface treating agent for hot-dip aluminum-zinc steel plate, and hot-dip aluminum-zinc steel plate and manufacturing method therefor Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/12—Wash primers
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Abstract
A surface treating agent for a hot-dip aluminum-zinc steel plate. The surface treating agent has the following components in parts by mass: 45 to 85 parts of aqueous aliphatic polyurethane resin, 5 to 20 parts of an organic silicon compound, 3 to 15 parts of a carbodiimide compound emulsion; 1 to 5 parts, based on metallic elements, of a water soluble metal slat compound; 1 to 10 parts, based on zirconia, of a water soluble zirconium compound; 1 to 10 parts of water dispersive nanometer clay; and 1 to 15 parts of a fluorine-containing polymer lubrication additive. A steel pate coated with the surface treating agent has good corrosion resistance, tarnish resistance, and machinability.
Description
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Description
Surface treating agent for hot-plated aluminium-zinc steel plate, hot-plated aluminium-zinc steel plate and method for manufacturing the same
Technical field The present invention relates to a surface treating agent for a steel plate, and particularly to a surface treating agent for a plated steel plate. The present invention also relates to a plated steel plate and a method for manufacturing the same.
Background Art Since hot-plated aluminium-zinc steel plates have performance features, such as good corrosion resistance, a high heat reflectivity, heat resistance and an appearance decorative property, they are widely used in various fields of architectures, household appliances etc., for example, roofs and wall surfaces of lightweight steel structures, purlines, floor bearing plates, guardrails, sound barriers, drainage devices, etc., and also for example, large-scale electric appliance backplanes, electric appliance cabinet shells, household appliance chassis lamps, etc., in the household appliance industry. In particular, when a hot-plated aluminium-zinc steel plate is used as a household appliance outdoor piece, more strict requirements are proposed for the hot-plated aluminium-zinc steel plate due to rigorous outdoor service environment: for example, the surface of the steel plate is required to have excellent corrosion resistance to ensure that the steel plate is not corroded during the service of the steel plate; and also for example, the steel plate surface is required to have good stain resistance so as to prevent contaminants in the outdoor environment from easily adhering to the surface of the steel plate. Moreover, the hot-plated aluminium-zinc steel plate used for household appliance products further needs to undergo continuous punch formation, which also poses higher requirements for the processability of the steel. In addition, the surface of the hot-plated aluminium-zinc steel plate must also has a good lubricating property and abrasion resistance, i.e., it should be ensured, after the punching, that the surface of the steel plate cannot be blackened due to friction or furrowed such that good corrosion resistance can be provided for a relatively long period of time. A Chinese patent document with a publication number of CN 1247777 A, published on 22 March 2000 and entitled "RESIN-COATED AL-ZN ALLOY COATED STEEL SHEET" discloses a resin-coated Al-Zn alloy coated steel sheet, which has good formation performance, anti-chromium solubility, corrosion resistance, alkali resistance and coatability, wherein a silane
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coupling agent having amino groups, chromium ions, and an alcohol at least selected from one of C2-C3 trihydric alcohols and dihydric alcohols are incorporated into an emulsion of an acrylic polymer resin containing carboxyl groups and glycidyl groups and having an acid value of 10-60,
and the resulting mixture is allowed to have a pH of 7-9 to obtain a chromium-containing resin composition. The chromium-containing resin composition is applied to a substrate so as to form an applied film, which is dried to obtain a resin film. The amount of the silane coupling
agent is 0.5-3.0 wt.% of the resin solid component in the acrylic resin emulsion. The amount of the alcohol is 25-150 wt.% of the chromium ions (B). The amount of the resin film is 0.5-3.0
g/m 2 . The content of chromium ions (B) in the resin film is 5-50mg/m2. The resin
composition disclosed in the patent document is a chromium-containing product, which is not environmentally friendly and is not suitable for the household appliance industry.
A Chinese patent document with a publication number of CN 1530462 A, published on 22
September 2004, and entitled "METAL SURFACE PROCESSING AGENT AND STEEL PLATES WITH ALUMINIUM PLATED SUB-LEAD ALLOYS PROCESSED THEREBY" relates to a metal surface processing agent and steel plates with aluminium plated sub-lead alloys
processed thereby, wherein the surface treating agent comprises: (A) an aqueous resin having combined carboxyl and acid amide; (B) one or more metal compounds selected from compounds
of metals Al, Mg, Ca, Zn, Ni, Co, Fe, Zr, Ti, V, W, Mn and Ce; and (C) a surface treating agent
for a metal material containing a silicon compound but not containing chromium; a steel plate plated with an alloy containing aluminium and sub-lead by a surface treatment with the
above-mentioned treating agent is a steel plate with aluminium plated sub-lead alloy which has a coating layer containing the above-mentioned components (A), (B) and (C), and surface-treated with a single-face skin film adhesion amount of at least 0.2-5.0 g/m2 without containing
chromium. The technical solution of the above-mentioned patent document does not involve
the stain resistance and processability of a plated aluminium-zinc steel plate. A Japanese patent document with a publication number of JP 2007-321224 A, published on
13 December 2007, and entitled "CHROMATE-FREE SURFACE-TREATED AL-ZN-BASED ALLOY-PLATED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AND ITS PRODUCTION METHOD" discloses a hot-plated aluminium-zinc steel plate having excellent corrosion resistance and water-resistant adherence, wherein the surface of the steel
plate is covered with a chromium-free treated organic/inorganic composite protective film, and the protective film consisting of a silane-modified aqueous anion resin, a tetravalent vanadium compound and phosphoric acid or its compound, etc.
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Summary of the Invention The present invention seeks to provide a surface treating agent for a hot-plated aluminium-zinc steel plate, and a steel plate coated with the surface treating agent has excellent corrosion resistance, superior stain resistance and good processability. In addition, the surface treating agent of the present invention does not contain chromium and has good stability, and provides better environmentally friendly and economic benefits. The present invention provides a surface treating agent for a hot-plated aluminium-zinc steel plate, the part by mass of each components thereof are as follows: an aqueous aliphatic polyurethane resin: 45-85 parts by mass; an organosilicon compound: 5-20 parts by mass; a carbodiimide compound emulsion: 3-15 parts by mass; a water soluble metal salt compound, in part by mass by the metal element: 1-5 parts by mass; a water soluble zirconium compound, in part by mass by zirconia: 1-10 parts by mass; a water-dispersed nano clay: 1-10 parts by mass; and a fluorine-containing polymer lubrication auxiliary: 1-15 parts by mass. In the above-mentioned technical solution, the aqueous aliphatic polyurethane resin is a polyester polyol-based aliphatic anionic aqueous polyurethane resin, which may be an aqueous solution or may also be water-dispersed, and has a solid content of 30-40%. When the part by mass of the aqueous aliphatic polyurethane resin is lower than 45 parts, both the weather resistance and corrosion resistance of the coating will be decreased; and when the part by mass of the component exceeds 85 parts, the alkali resistance of the coating will become poor. Preferably, the part by mass of the aqueous aliphatic polyurethane resin is controlled at 55-70 parts. In this technical solution, the reason why the part by mass of the organosilicon compound is set as 5-20 parts lies in: if the part by mass of the organosilicon compound is less than 5 parts, the adhesion and corrosion resistance of the coating will be decreased; and if the part by mass of the organosilicon compound is greater than 20 parts, the corrosion resistance of the coating will be decreased, and the stability of the surface treating agent will also become poor. Further, the part by mass of the organosilicon compound can also be set as 7-15 parts. In the technical solution of the present invention, the carbodiimide compound emulsion can be reacted with carboxyl groups in the aqueous aliphatic polyurethane resin so as to improve the cross linking degree of the composite coating. If the part by mass of the carbodiimide compound
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emulsion on the aqueous aliphatic polyurethane resin will not be obvious, and the insufficiency of cross-linking degree of the coating will result in a decrease of corrosion resistance; and if the part by mass of the carbodiimide compound emulsion is higher than 15 parts, the reaction between the carbodiimide compound emulsion and aqueous aliphatic polyurethane resin is excessively violently, which tends to a gel phenomenon, thus leading to a decrease of stability of the surface treating agent. In order to obtain a better technical effect, the part by mass of the carbodiimide compound emulsion can be further controlled at 4-10 parts. It is necessary to state herein that the solid content of carbodiimide in the above-mentioned carbodiimide compound emulsion is 35-50% and the equivalent of carbodiimide is 380-590. Furthermore, with regard to the water soluble metal salt compound, the part by mass by the metal elements contained is 1-5 parts. When the part by mass of the total amount of metal elements present in the water soluble metal salt compound is lower than 1 part, the under-film corrosion expansion resistance of the coating is poorer; and when the part by mass of the total amount of metal elements present in the water soluble metal salt compound is higher than 5 parts, the metal ions affect the stability of the surface treating agent, leading to a decrease in stability of the surface treating agent. Preferably, the part by mass of the water soluble metal salt compound is designed to be 2-4 parts. On the basis of the technical solution of the present invention, the water soluble zirconium compound is added according to the part by mass of zirconia. If the part by mass by zirconia is less than 1 part, both the ultraviolet ageing resistance and adhesion of the coating will be poorer; and if the part by mass by zirconia is less than 10 parts, the stability of the surface treating agent is decreased. Preferably, the part by mass of the water soluble zirconium compound is designed to be 3-6 parts. In the present invention, the part by mass of the water-dispersed nano clay in the surface treating agent is designed to be 1-10 parts, because: if the part by mass of the water-dispersed nano clay does not reach 1 part, this results in the decrease of the corrosion resistance and stain resistance of the coating; and if the part by mass of the water-dispersed nano clay exceeds 10 parts, the viscosity of the surface treating agent will be substantially increased, which in turn results in the decrease of the application property and stability of the surface treating agent. Preferably, the part by mass of the water-dispersed nano clay can be designed to be 2-6 parts. In the technical solution of the present invention, the part by mass of the fluorine-containing polymer lubrication auxiliary is controlled at 1-15 parts, the reason being: when the part by mass of the fluorine-containing polymer lubrication auxiliary is less than 1 part, the lubricating property of the coating is insufficient; and when the part by mass of the
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fluorine-containing polymer lubrication auxiliary is greater than 15 parts, both the corrosion resistance and weather resistance of the coating may be decreased. As a more preferred setting
range, the part by mass of the fluorine-containing polymer lubrication auxiliary is controlled at
3-10 parts. Further, in the surface treating agent for a hot-plated aluminium-zinc steel plate of the
present invention, the above-mentioned organosilicon compound is at least one of silicic acid,
silicates, colloidal silica and organic silane coupling agents. More further, in the surface treating agent for a hot-plated aluminium-zinc steel plate of the
present invention, the above-mentioned organosilicon compound is an organic silane coupling
agent, which is at least one of vinyl silane coupling agents, epoxy silane coupling agents and mercapto silane coupling agents.
Further, in the surface treating agent for a hot-plated aluminium-zinc steel plate of the
present invention, the above-mentioned water soluble zirconium compound is ammonium zirconium carbonate.
Further, in the surface treating agent for a hot-plated aluminium-zinc steel plate of the
present invention, the above-mentioned water-dispersed nano clay is at least one of nano montmorillonite, nano bentonite and polyphosphate-modified nano bentonite.
Taking the polyphosphate-modified nano bentonite as an example, it can be uniformly
spread in the coating as a nano lamella layer to significantly improve the corrosion resistance and stain resistance of the coating.
Further, in the surface treating agent for a hot-plated aluminium-zinc steel plate of the present invention, the above-mentioned fluorine-containing polymer lubrication auxiliary is a polytetrafluoroethylene wax and/or polyfluo wax.
Further, in the surface treating agent for a hot-plated aluminium-zinc steel plate of the
present invention, the average particle diameter of the above-mentioned fluorine-containing polymer lubrication auxiliary is 0.1-2.0 microns.
The inventor has found that when the average particle diameter of the fluorine-containing
polymer lubrication auxiliary is lower than 0.1 microns or higher than 2.0 microns, the processability of the composite coating will be decreased in both cases. Therefore, in order to
improve the processability of the steel plate coated with the composite coating, it is preferred to
define the average particle diameter of the fluorine-containing polymer lubrication auxiliary in a range between 0.1-2.0 microns; and more preferably, the average particle diameter of the fluorine-containing polymer lubrication auxiliary can also be controlled between 0.3-1.0 micron.
Another object of the present invention is providing a hot-plated aluminium-zinc steel plate,
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which has excellent corrosion resistance, superior surface stain resistance and good processability. In addition, the hot-plated aluminium-zinc steel plate coated with the surface
treating agent does not contain the harmful element chromium in the surface, is an
environmentally friendly product, and can be used in the relevant industry fields of building, household appliances, etc.
In order to achieve the above-mentioned object, the present invention provides a hot-plated
aluminium-zinc steel plate, of which the surface has a composite coating coated by any surface treating agent as mentioned above.
Further, the composite coating of the hot-plated aluminium-zinc steel plate of the present
invention has a dry film thickness of 1-3 microns. If the dry film thickness of the composite coating does not reach 1 micron, the composite
coating applied on the surface of the steel plate will be thinner, thus leading to a decrease of
comprehensive properties of the steel plate, such as punching processability, corrosion resistance, stain resistance.
Accordingly, the present invention also discloses a method for manufacturing the above
hot-plated aluminium-zinc steel plate, which comprises: applying the surface treating agent on at least one surface of the hot-plated aluminium-zinc steel plate, and drying at 80-180°C, to obtain
a hot-plated aluminium-zinc steel plate having a composite coating on the surface.
The hot-plated aluminium-zinc steel plate is obtained by the above-mentioned manufacturing method, by means of one pass coating on the surface of the steel plate, and after
the completion of the coating, drying at between 80-180°C to obtain a hot-plated aluminium-zinc steel plate having a composite coating on the surface. If the temperature is lower than 80°C, the cross-linking of the composite coating is not sufficient, leading to a decrease of their various
properties; and if the temperature is higher than 180°C, the properties of some components in the
surface treating agent will change, thus affecting the final effect of the composite coating applied on the steel plate.
In the above-mentioned technical solution, the composite coating may be directly applied
on the surface of the hot-plated aluminium-zinc steel plate by roller coating or spray coating. With regard to the above-mentioned technical solution, the above-mentioned composite
coating may be applied on merely one side of the hot-plated aluminium-zinc steel plate, or both
sides of the hot-plated aluminium-zinc steel plate. The heating and drying method for the composite coating in the method for manufacturing the hot-plated aluminium-zinc steel plate of the present invention is not particularly limited, and
heating methods such as hot blast heating, induction heating, infrared heating may be used.
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After coating the surface of the steel plate with the surface treating agent for a hot-plated aluminium-zinc steel plate of the present invention, the steel plate has excellent corrosion
resistance, superior stain resistance, good processability and better weather resistance.
In addition, the surface treating agent of the present invention does not contain chromium and has good system stability, and provides better environmentally friendly and economic
benefits.
After the hot-plated aluminium-zinc steel plate of the present invention is coated with the surface treating agent, good comprehensive performances such as corrosion resistance, stain
resistance, weather resistance, and processability are provided.
By the method for manufacturing a hot-plated aluminium-zinc steel plate of the present invention, a hot-plated aluminium-zinc steel plate having excellent corrosion resistance, superior
surface stain resistance, better weather resistance and good processability can be obtained.
Particular Embodiments
The surface treating agent for a hot-plated aluminium-zinc steel plate, hot-plated
aluminium-zinc steel plate and the method for manufacturing the same, as described in the present invention will be further explained and illustrated below in combination with particular
Examples; however, the explanation and description do not form an inappropriate definition of
the technical solutions of the present invention. Examples 1-7 and Comparative Examples 1-3
In each of Examples 1-7 and Comparative Examples 1-3, a hot-plated aluminium-zinc steel plate having a plate thickness of 1.0 mm is used, a surface treating agent (the part by masses of various components of the surface treating agent being as shown in table 1 in detail) is applied
on at least one surface of the hot-plated aluminium-zinc steel plate, and after drying at 80-180°C,
a hot-plated aluminium-zinc steel plate having a composite coating on the surface is obtained, the dry film thickness of the composite coating being 1-3 microns, specific parameters of the
drying process being as shown in table 2 in detail.
Table 1 lists the part by masses of various components of composite coatings in Examples 1-7 and Comparative Examples 1-3.
Table 1. Comparati Comparati Comparati Example Examp Examp Examp Examp Examp Examp Number ve ve ve eI le2 le3 le4 le5 le6 le7 Example 1 Example 2 Example 3
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aqueous Type* A A A A A A A A A A aliphatic
polyurethane part by 75 65 70 67 70 60 65 65 70 75 resin (A) mass
Organosilico Type* B1 B2 B3 B1 B2 83 B2 BI B2 B3
n compound part by (B) 10 13 11 9 8 10 15 15 13 11.5 mass
Carbodiimide'Type* C C C C C C C - C C
compound part by emulsion (C) 4.0 3.5 4.0 10 4.0 8.0 5.0 - 3.0 4.0 mass
Type*' D1 D1 D1 D1 D2 D2 D2 Dl D2 D1 Water soluble
metal salt part by compound mass (by 2.0 3.0 1.0 1.0 2.0 3.0 4.0 5.0 3.0 3.0 (D) metal
element)
Water soluble Type* E E E E E E E E E E
zirconium part by compound mass (by 2.0 3.0 2.0 2.0 4.0 6.0 5.0 5.0 6.0 4.0 (E) zirconia)
water-dispers Type* F1 Fl Fl Fl F2 F2 F3 F3 - F3
ed nano clay ~part by (F) 2.0 5.5 2.0 1.0 5.0 6.0 2.0 3.0 - 2.5 mass
Fluorine-cont GI GI G1 G2 62 G2 G1 G2 airing Type* GI
polymer .part by lubrication 3.0 7.0 10 3.0 7.0 4.0 4.0 7.0 5.0 mass auxiliary (G)
*NOTE: A is an aqueous aliphatic polyurethane resin; B1 is vinyl trimethoxy silane, B2 is
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epoxypropyloxypropyl trimethoxy silane, and B3 is aminopropyl triethoxy silane; C is a carbodiimide compound emulsion; DI is vanadium oxide, and D2 is ammonium fluorotitanate; E is ammonium zirconium carbonate; F1 is polyphosphate-modified nano montmorillonite, F2 is
nano bentonite, and F3 is nano montmorillonite; and G Iis a polytetrafluoroethylene wax, and G2 is a polyfluo wax.
Table 2 lists parameters of the drying process in the method for manufacturing the hot-plated aluminium-zinc steel plate in Examples 1-7 and Comparative Examples 1-3.
Table 2.
Number Drying temperature (°C)
Example 1 100 Example 2 90 Example 3 120 Example 4 130 Example 5 110 Example 6 140 Example 7 150 Comparative Example 1 80
Comparative Example 2 120
Comparative Example 3 120
The hot-plated aluminium-zinc steel plates coated with the surface treating agents in the
above-mentioned Examples 1-7 and Comparative Examples 1-3 are sampled and then tested according to the following test methods, and then the obtained test data for evaluation of various properties are listed in table 3. In these methods, the tests of various performance parameters
are as follows: 1) Corrosion resistance A brine spray test is performed on a test sample plate (a flat plate), with the test standard
being ASTM B117 and the test time being 240 hours, evaluation criteria being as follows: 0: the white rust area rate is less than or equal to 5%; o: the white rust area rate is greater than 5% and less than or equal to 10%;
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A: the white rust area rate is greater than 10% and less than or equal to 50%; and x: the white rust area rate is greater than 50%.
2) Stain resistance A 5% carbon black suspension is dropwise added on the surface of a test sample plate to allow same to form an approximately round water stain having a diameter of about 50 mm, the
test sample plate is taken out after baking at 60°C for 1 h, and blown to dryness after the residual carbon black on the surface has been washed off, and the changes of before-after colour
difference (AE*) in the water stain area is measured, the evaluation criteria being as follows:
0: the colour difference AE* is less than or equal to 3.0, the surface stain resistance being excellent;
0: the colour difference AE* is greater than 3.0 and less than or equal to 6.0;
A: the colour difference AE* is greater than 6.0 and less than or equal to 9.0; and x: the colour difference AE* is greater than 9.0, the surface contamination is serious.
3) Processability 3a. After a test sample plate is subjected to a T bend test, the peeling degree of the skin film
after processing is evaluated using a tape stripping method, the evaluation criteria being as
follows: 0: no peeling-off occurs to the skin film at 2T;
0: no peeling-off occurs to the skin film at 3T;
A: no peeling-off occurs to the skin film at 4T; and x: no peeling-off occurs to the skin film at 5T.
3b. A brake bead method is used for the test, under experimental conditions where the
pressure under bead is fixed at 3 KN, the pressure head diameter is 9.6 mm, and the drawing speed is 200 mm/min. The appearance was observed after drawing, the evaluation criteria
being as follows:
0: the appearance has no change; o: a small amount of black points on the appearance;
A: relatively more obvious black stripes on the appearance;
x: the overall appearance becomes black.
4) Weather resistance
A sample plate is placed in an ultraviolet ageing test box (a UVB-313 lamp tube), having 8
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h as a cycle period, with ultraviolet light illumination of 4 h at a black panel temperature of 60 3°C, and condensation of 4 h at a black panel temperature of 50 3°C, and after 600 h, the
appearance of the sample plate was observed and the gloss retention rate was measured, the
evaluation criteria being as follows: 0: the appearance of the sample plate has no obvious change, the gloss retention being
greater than or equal to 70%;
o: the appearance of the sample plate has a slight change, the gloss retention being greater than or equal to 50% and less than 70%;
A: the appearance of the sample plate has a remarkable change, the gloss retention being
greater than or equal to 30% and less than 50%; and x: the appearance of the sample plate has a serious change, the gloss retention being less
than 30%.
5) Storage stability
The surface treating agent is placed at room temperature, and the change of the solution is
observed after 90 days, the evaluation criteria being as follows: 0: no change; o: slightly thickened (functioning normally);
A: seriously thickened; and x: gel.
Table 3 lists various performance parameters of the hot-plated aluminium-zinc steel plates coated with the surface treating agents in Examples 1-7 and Comparative Examples 1-3.
Table 3.
Various performance parameters
Number Corrosion Stain Weather Processability Storage
resistance resistance resistanc T bend Drawing stability e
Example 1 © o a © © ©
Example 2 a a 0 © © © Example a 0 a © ©
Example 4 0 0 0o 0 © Example 5 0 a 0 a ©
Example 6 a 0 0 0 0
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Example 7 0 a a o ©
Comparative A xo o Example 1
Comparative o x o o o A Example 2
Comparative o A o x
Example 3
As can be seen in combination ofTable 1 and Table 3, since in Comparative Example 1, no carbodiimide compound emulsion (C) is contained, the cross-linking degree of the composite coating is insufficient, thus leading to poorer stain resistance, corrosion resistance and weather resistance (the evaluation results being "A" or "x"); since no water-dispersed nano clay (F) is added in Comparative Example 2, the stain resistance of the composite coating is poorer (the evaluation results being "x"); and since no fluorine-containing polymer lubrication auxiliary (G) is added in Comparative Example 3, the processability of the steel plate is poorer (the evaluation result being "x"). As can be seen from table 3, as compared to Comparative Examples 1-3, after the hot-plated aluminium-zinc steel plates in Examples 1-7 are subjected to the above-mentioned various tests, the evaluation results are all "0"and "o", which indicates that the hot-plated aluminium-zinc steel plates coated with the surface treating agent of the present invention all show excellent corrosion resistance, superior stain resistance, better weather resistance and good processability. In addition, it can be seen that with regard to the stabilities of storage of the hot-plated aluminium-zinc steel plates in Examples 1-7, no property change easily occurs after a longer time of storage, such that the effect of the surface treating agent on the comprehensive performance of the hot-plated aluminium-zinc steel plates can be avoided as far as possible.
It should be noted that those listed above are merely particular embodiments of the present invention, and obviously, the present invention is not limited to the above embodiments, and can have many similar changes. With regard to all variants, if directly derived or conceived from the contents disclosed in the present invention by a person skilled in the art, they shall all fall within the scope of protection of the present invention.
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Throughout this specification, unless the context requires otherwise, the word "comprise" or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or integer or method step or group of elements or integers or method steps but not the exclusion of any element or integer or method step or group of elements or integers or method steps.
The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgement or admission or any form of suggestion that the prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.
Claims (17)
1. A surface treating agent for a hot-plated aluminium-zinc steel plate, consisting of: an aqueous aliphatic polyurethane resin: 45-85 parts by mass; an organosilicon compound: 5-20 parts by mass; a carbodiimide compound emulsion: 3-15 parts by mass; a water soluble metal salt compound, in part by mass by the metal element: 1-5 parts by mass; a water soluble zirconium compound, in part by mass by zirconia: 1-10 parts by mass; a water-dispersed nano clay: 1-10 parts by mass; and a fluorine-containing polymer lubrication auxiliary: 1-15 parts by mass.
2. The surface treating agent for a hot-plated aluminium-zinc steel plate of claim 1, wherein: the amount of the aqueous aliphatic polyurethane resin is 65-75 parts by mass; the amount of the organosilicon compound is 7-15 parts by mass; the amount of the carbodiimide compound emulsion is 3-10 parts by mass; the amount of the water-dispersed nano clay is 2-6 parts by mass; and the amount of the fluorine-containing polymer lubrication auxiliary is 3-10 parts by mass.
3. The surface treating agent for a hot-plated aluminium-zinc steel plate of claim 1 or 2, wherein the aqueous aliphatic polyurethane resin is a polyester polyol-based aliphatic anionic aqueous polyurethane resin, which is an aqueous solution or is water-dispersed, and has a solid content of 3 0 - 4 0 %.
4. The surface treating agent for a hot-plated aluminium-zinc steel plate of any one of claims 1 to 3, wherein said organosilicon compound is at least one of silicic acid, silicates, colloidal silica and organic silane coupling agents.
5. The surface treating agent for a hot-plated aluminium-zinc steel plate of claim 4, wherein said organosilicon compound is an organic silane coupling agent, which is at least
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one of vinyl silane coupling agents, epoxy silane coupling agents and mercaptosilane coupling agents.
6. The surface treating agent for a hot-plated aluminium-zinc steel plate of claim 4, wherein said organosilicon compound is vinyl trimethoxy silane, epoxypropyloxypropyl trimethoxy silane or aminopropyl triethoxy silane.
7. The surface treating agent for a hot-plated aluminium-zinc steel plate of any one of claims 1 to 6, wherein said water soluble zirconium compound is ammonium zirconium carbonate.
8. The surface treating agent for a hot-plated aluminium-zinc steel plate of any one of claims 1 to 7, wherein said water-dispersed nano clay is at least one of nano montmorillonite, nano bentonite and polyphosphate-modified nano bentonite.
9. The surface treating agent for a hot-plated aluminium-zinc steel plate of any one of claims 1 to 8, wherein said water-dispersed nano clay is polyphosphate-modified nano montmorillonite.
10. The surface treating agent for a hot-plated aluminium-zinc steel plate of any one of claims 1 to 9, wherein said fluorine-containing polymer lubrication auxiliary is a polytetrafluoroethylene wax and/or polyfluo wax.
11. The surface treating agent for a hot-plated aluminium-zinc steel plate of any one of claims 1 to 10, wherein the average particle diameter of said fluorine-containing polymer lubrication auxiliary is 0.1-2.0 microns.
12. The surface treating agent for a hot-plated aluminium-zinc steel plate of any one of claims 1 to 11, wherein the solid content of carbodiimide in the carbodiimide compound emulsion is 35-50% and the equivalent of carbodiimide is 380-590.
13. The surface treating agent for a hot-plated aluminium-zinc steel plate of any one of claims 1 to 12, wherein the water soluble metal salt compound is vanadium oxide.
H:\nterwoven\NRPortbl\DCC\AAR\19760259 _.docx-I6/0/2020
14. The surface treating agent for a hot-plated aluminium-zinc steel plate of any one of claims 1 to 13, wherein: the amount of the aqueous aliphatic polyurethane resin is 55-75 parts by mass; the amount of the organosilicon compound is 10-15 parts by mass; the amount of the carbodiimide compound emulsion is 4-8 parts by mass; the amount of the water soluble metal salt compound, in part by mass by the metal element, is 1-5 parts by mass; the amount of the water soluble zirconium compound, in part by mass by zirconia, is 2-6 parts by mass; the amount of the water-dispersed nano clay is 2-6 parts by mass; and the amount of the fluorine-containing polymer lubrication auxiliary is 3-10 parts by mass; wherein the aqueous aliphatic polyurethane resin is a polyester polyol-based aliphatic anionic aqueous polyurethane resin, which is an aqueous solution or is water dispersed, and has a solid content of 30-40%; and the solid content of carbodiimide in the carbodiimide compound emulsion is 35-50% and the equivalent of carbodiimide is 380 590.
15. A hot-plated aluminium-zinc steel plate, of which the surface has a composite coating coated with the surface treating agent of any one of claims I to 14.
16. The hot-plated aluminium-zinc steel plate of claim 15, wherein said composite coating has a dry film thickness of 1-3 microns.
17. A method for manufacturing the hot-plated aluminium-zinc steel plate of claim 15, characterized by applying the surface treating agent on at least one surface of the hot plated aluminium-zinc steel plate, and drying at 80-180°C, to obtain a hot-plated aluminium-zinc steel plate having a composite coating on the surface.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410766495.9 | 2014-12-11 | ||
| CN201410766495.9A CN105733430A (en) | 2014-12-11 | 2014-12-11 | Surface treatment agent for hot-dip Al-Zn coated steel sheet, the hot-dip Al-Zn coated steel sheet and production method thereof |
| PCT/CN2015/095361 WO2016091059A1 (en) | 2014-12-11 | 2015-11-24 | Surface treating agent for hot-dip aluminum-zinc steel plate, and hot-dip aluminum-zinc steel plate and manufacturing method therefor |
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| Publication Number | Publication Date |
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| AU2015361631A1 AU2015361631A1 (en) | 2017-06-29 |
| AU2015361631B2 AU2015361631B2 (en) | 2020-02-13 |
| AU2015361631B9 true AU2015361631B9 (en) | 2020-02-27 |
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| AU2015361631A Active AU2015361631B9 (en) | 2014-12-11 | 2015-11-24 | Surface treating agent for hot-dip aluminum-zinc steel plate, and hot-dip aluminum-zinc steel plate and manufacturing method therefor |
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| JP (1) | JP6603319B2 (en) |
| CN (1) | CN105733430A (en) |
| AU (1) | AU2015361631B9 (en) |
| PT (1) | PT2016091059B (en) |
| WO (1) | WO2016091059A1 (en) |
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| CN109563626B (en) * | 2016-09-13 | 2021-04-13 | 杰富意钢铁株式会社 | Grain-oriented electrical steel sheet with chromium-free insulating tension film and method for producing the same |
| US11214692B2 (en) | 2017-12-04 | 2022-01-04 | Hamilton Sundstrand Corporation | Increasing anti-corrosion through nanocomposite materials |
| CN110845696A (en) * | 2019-12-03 | 2020-02-28 | 山东天庆科技发展有限公司 | Waterborne polyurethane resin and preparation method thereof |
| CN113522706B (en) * | 2020-04-16 | 2022-10-21 | 宝山钢铁股份有限公司 | Surface treatment color coating substrate suitable for radiation curing type color plate production process |
| CN113527991B (en) * | 2020-04-16 | 2022-06-24 | 宝山钢铁股份有限公司 | Environment-friendly water-based surface treating agent for color-coated substrate and using method thereof |
| CN114075663B (en) * | 2020-08-21 | 2023-09-12 | 宝山钢铁股份有限公司 | Water-based treating agent for carbon steel surface, well corrosion-resistant carbon steel and preparation method thereof |
| CN114759106B (en) * | 2021-01-12 | 2024-03-08 | 宝山钢铁股份有限公司 | Coated steel plate suitable for inline thin film photovoltaic module and manufacturing method thereof |
| CN116949439B (en) * | 2022-04-15 | 2025-09-09 | 宝山钢铁股份有限公司 | Coated steel sheet for hot stamping and aqueous surface treatment liquid used therefor |
| CN116355444B (en) * | 2023-03-15 | 2024-09-10 | 深圳先进技术研究院 | Super-hydrophobic and super-oleophobic modified liquid, preparation method thereof and coating containing same |
| CN116356241A (en) * | 2023-04-03 | 2023-06-30 | 常熟科弘材料科技有限公司 | Method for eliminating surface ripple defect of aluminum-zinc-plated steel coil |
| JP2025060180A (en) * | 2023-09-29 | 2025-04-10 | 日本パーカライジング株式会社 | Metal surface treatment agent, method for producing metal material, and metal material |
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| CN103459677A (en) * | 2011-03-29 | 2013-12-18 | 新日铁住金株式会社 | Surface-treated steel sheet and method for producing same |
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| JP4650967B2 (en) * | 2000-08-28 | 2011-03-16 | 株式会社Adeka | Water-based metallic base coating composition containing a thickener and viscosity modifier |
| JP3865693B2 (en) * | 2002-12-26 | 2007-01-10 | 日本ペイント株式会社 | Aqueous resin composition for treatment of aluminum-zinc alloy plated steel sheet, coating method, and aluminum-zinc alloy plated steel sheet |
| JP4389067B2 (en) * | 2003-08-29 | 2009-12-24 | 三井化学株式会社 | Water-dispersed rust-proof coating composition |
| US20080199723A1 (en) * | 2005-07-25 | 2008-08-21 | Posco | Pre-Sealed Steel Sheet With Improved Anti-Corrosion And Weldability And Preparing Method Thereof |
| JP3872493B1 (en) * | 2005-08-17 | 2007-01-24 | 日本パーカライジング株式会社 | Water-based surface treatment agent for metal material and surface-coated metal material |
| JP2009013363A (en) * | 2007-07-09 | 2009-01-22 | Cci Corp | Coating composition |
| JP5090858B2 (en) * | 2007-11-05 | 2012-12-05 | 日本ペイント株式会社 | Basic polysilanol-containing inorganic-organic composite coating composition |
| JP5108820B2 (en) * | 2008-04-17 | 2012-12-26 | 日本パーカライジング株式会社 | Water-based surface treatment agent for precoat metal material, surface treatment metal material, and precoat metal material |
| JP5264363B2 (en) * | 2008-08-11 | 2013-08-14 | 新日鐵住金株式会社 | Surface treatment metal material and metal surface treatment agent |
| KR101271965B1 (en) * | 2011-07-13 | 2013-06-07 | 주식회사 노루코일코팅 | Resin composition for surface treatment and steel sheet coated by the same |
| JP2013237874A (en) * | 2012-05-11 | 2013-11-28 | Nippon Steel & Sumitomo Metal Corp | Surface-treated steel sheet and water-based surface treatment solution used therefor |
| CN103254755B (en) * | 2013-05-27 | 2016-01-27 | 宝山钢铁股份有限公司 | There is hot-dip aluminizing zincium steel plate of excellent weather resistance, solidity to corrosion and alkali resistance and preparation method thereof and surface treatment agent |
| CN103740255B (en) * | 2013-12-27 | 2016-01-20 | 上海涂料有限公司技术中心 | A kind of hydrate colour chromium-free fingerprint-resistant coating for metallizing material surface and constructional method thereof |
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- 2015-11-24 JP JP2017529071A patent/JP6603319B2/en active Active
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| CN103459677A (en) * | 2011-03-29 | 2013-12-18 | 新日铁住金株式会社 | Surface-treated steel sheet and method for producing same |
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| Publication number | Publication date |
|---|---|
| AU2015361631A1 (en) | 2017-06-29 |
| JP2018505959A (en) | 2018-03-01 |
| WO2016091059A1 (en) | 2016-06-16 |
| PT2016091059B (en) | 2018-07-24 |
| AU2015361631B2 (en) | 2020-02-13 |
| CN105733430A (en) | 2016-07-06 |
| JP6603319B2 (en) | 2019-11-06 |
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