US3847663A - Cleaning of metals with compositions containing alkali metal silicate and chloride - Google Patents
Cleaning of metals with compositions containing alkali metal silicate and chloride Download PDFInfo
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- US3847663A US3847663A US00273253A US27325372A US3847663A US 3847663 A US3847663 A US 3847663A US 00273253 A US00273253 A US 00273253A US 27325372 A US27325372 A US 27325372A US 3847663 A US3847663 A US 3847663A
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- alkali metal
- chloride
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- 239000000203 mixture Substances 0.000 title claims abstract description 26
- 238000004140 cleaning Methods 0.000 title claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 20
- 239000002184 metal Substances 0.000 title claims abstract description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims description 7
- 229910001514 alkali metal chloride Inorganic materials 0.000 title claims description 7
- 229910052910 alkali metal silicate Inorganic materials 0.000 title claims description 7
- 150000002739 metals Chemical class 0.000 title claims description 7
- 239000002738 chelating agent Substances 0.000 claims abstract description 9
- 239000011734 sodium Substances 0.000 claims abstract description 9
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 7
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 7
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 5
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 24
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical group OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 7
- 239000004480 active ingredient Substances 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- 239000004615 ingredient Substances 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- JUWGUJSXVOBPHP-UHFFFAOYSA-B titanium(4+);tetraphosphate Chemical compound [Ti+4].[Ti+4].[Ti+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O JUWGUJSXVOBPHP-UHFFFAOYSA-B 0.000 claims description 5
- 239000002280 amphoteric surfactant Substances 0.000 claims description 4
- 239000002736 nonionic surfactant Substances 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 1
- 229910019142 PO4 Inorganic materials 0.000 abstract description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 8
- 239000010452 phosphate Substances 0.000 abstract description 8
- 239000004094 surface-active agent Substances 0.000 abstract description 6
- 150000001805 chlorine compounds Chemical class 0.000 abstract description 3
- 150000004760 silicates Chemical class 0.000 abstract description 3
- 238000003911 water pollution Methods 0.000 abstract description 2
- 235000021317 phosphate Nutrition 0.000 description 11
- 235000002639 sodium chloride Nutrition 0.000 description 9
- 239000003921 oil Substances 0.000 description 6
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 4
- 235000017550 sodium carbonate Nutrition 0.000 description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- -1 betaine sulfonates Chemical class 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910052914 metal silicate Inorganic materials 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 235000019351 sodium silicates Nutrition 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- DMQQXDPCRUGSQB-UHFFFAOYSA-N 2-[3-[bis(carboxymethyl)amino]propyl-(carboxymethyl)amino]acetic acid Chemical compound OC(=O)CN(CC(O)=O)CCCN(CC(O)=O)CC(O)=O DMQQXDPCRUGSQB-UHFFFAOYSA-N 0.000 description 1
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000005791 algae growth Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229960003237 betaine Drugs 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- PMYUVOOOQDGQNW-UHFFFAOYSA-N hexasodium;trioxido(trioxidosilyloxy)silane Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[O-][Si]([O-])([O-])O[Si]([O-])([O-])[O-] PMYUVOOOQDGQNW-UHFFFAOYSA-N 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 150000002462 imidazolines Chemical class 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 150000004668 long chain fatty acids Chemical class 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- POWFTOSLLWLEBN-UHFFFAOYSA-N tetrasodium;silicate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Si]([O-])([O-])[O-] POWFTOSLLWLEBN-UHFFFAOYSA-N 0.000 description 1
- GPRLSGONYQIRFK-MNYXATJNSA-N triton Chemical compound [3H+] GPRLSGONYQIRFK-MNYXATJNSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/78—Pretreatment of the material to be coated
- C23C22/80—Pretreatment of the material to be coated with solutions containing titanium or zirconium compounds
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
Definitions
- This invention relates to methods for cleaning metal surfaces during processing thereof, especially prior to phosphating. More particularly, it relates to a method for cleaning a metal surface'which comprises contacting said surface with an aqueous cleaning composition wherein the active ingredientscomprise water-soluble alkali metal silicate and alkali metal chloride, the weight ratio of said silicate to said chloride being between about 4:1 and i021.
- a principal object of the present invention is to provide a new method for heavy-duty cleaning of metal surfaces.
- a further object is to provide a metal cleaning method in which the use of phosphates is avoided or substantially avoided, thereby decreasing the tendency of such compositions to pollute water.
- alkali metal is meant the metals in Group [A of the Periodic Table; that is, lithium, sodium, potassium, rubidium and cesium. Sodium and potassium are preferred, and because of their ready availability and low cost, the sodium salts are most often used.
- any water-soluble alkali metal silicate may be used in the method of this invention.
- suitable sodium silicates include sodium disilicate, Na Si O sodium metalsilicate, Na SiO and its hydrates; sodium orthosilicate, Na SiO and so-called water glass, which is a liquid mixture of various sodium silicates.
- Sodium metasilicate is, however, preferred.
- the alkali metal chloride may likewise be from any suitable source, but the preferred chlorides consist of crystals with high absorbent power. Particularly useful is a form of common salt sold by the Morton Salt Company and identified as North Star Fine.”
- the weight ratio of silicate to chloride in the compositions used in the method of this invention should be between about 4:1 and Weight ratios on the order of 7:1 or 8:1 are preferred.
- Surfactants are particularly desirable in the compositions used in the method of this invention because they. are ordinarily instrumental in starting the cleaning process which is continued by the alkaline ingredients.
- chelating agents include the various amainopolycarboxylic acids andtheir water-soluble salts, such as ethylenediaminetetraacetic acid, trimethylenediaminetetraacetic acid, nitrilotriacetic acid and the like. Particularly useful is the tetrasodium salt of ethylenediaminetetraacetic acid, sold under the trade name Versene.
- the proportions of surfactants and chelating agents used are usually about 3-10 parts by weight per parts of active ingredients (excluding water).
- Suitable for use as fillers and pH control agents are such materials as sodium carbonate (soda ash) and similar alkaline materials which are water-soluble and inexpensive.
- compositions may also contain conditioners or activators of the type used to prepare metal surfaces for phosphating.
- conditioners or activators are the titanium phosphate compositions described in US. Pat. No. 2,322,349.
- the preferred cleaning compositions contain about 65-80 parts by weight of sodium metasilicate, about 5-15 parts of sodium chloride, about 5-15 parts of sodium carbonate, about 0-10 parts of ethylenediaminetetraacetic acid or a water-soluble salt thereof (an optional ingredient), about 4-l0 parts of at least one non-ionic or amphotenc surfactant, and optionally about 4-10 parts of colloidal titanium phosphate.
- a method for cleaning the surface of metals during processing thereof which comprises contacting said surface at a temperature of about 50-100C. with an aqueous cleaning composition in the liquid state wherein the active ingredients comprise water-soluble alkali metal silicate and alkali metal chloride, the weight ratio of said silicate to said chloride being between about 4:1 and 10:1.
- the cleaning composition additionally contains at least one nonionic or amphoteric surfactant and a chelating agent, each being present in the amount of about 3l0 parts by weight per parts of active ingredients.
- chelating agent is ethylenediaminetetraacetic acid or a watersoluble salt thereof.
- a method according to claim 2 wherein the active ingredients in said cleaning composition consist essentially of about 65-80 parts by weight of sodium metasilicate, about 51 5 parts of sodium chloride, about 5-15 parts of sodium carbonate, about 0-10 parts of ethylenediaminetetraacetic acid or a water-soluble salt thereof, and about 4-10 parts of at least one non-ionic or amphoteric surfactant, said ingredients being dissolved in water to a concentration of about 5-20 grams per liter.
- composition additionally contains about 4-10 parts by weight of colloidal titanium phosphate.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Metal surfaces are cleaned, prior to phosphating or the like, with compositions containing alkali metal (especially sodium) silicates and chlorides, and preferably also containing surfactants and chelating agents. These compositions have cleaning power comparable to phosphate-containing cleaners and cause less water pollution upon discharge into natural waterways.
Description
UIllttEd States Patent 1191 3,847,663
Shumaker 9 1 Nov. 12, 1974 [54] CLEANING OF METALS WITH 2,490,062 12/1949 Jernstedt l48/6.15
O O O CONTAINING ALKALI 2,044,467 6/1936 Cleveland.. 252/135 2,440,837 5/1948 Webster 252/135 METAL SILICATE AND CHLORIDE 3,368,978 2/1968 ll'anl 252/527 [75] Inventor: Gary Allen Shumaker, Mentor, 2,956,026 10/1960 Lew 252/559 Ohm FOREIGN PATENTS OR APPLICATIONS [73] Assignee: The Lubrizol Corporation, 935,733 9/1963 Great Britain hffe OTHER PUBLIC TIONS [22] Fned: July 1972 Bennett, The Chemical Formulary, Vol. X1 1 l, 1967, 211 Appl. 190.; 273,253 P Related Application Data Primary Examiner-Herbert B. Guynn [63] Continuation-impart of Ser. No. 58,182, July 24, Attorney, Agent, ,-Fi w 1 Ad J 1970, abandoned- V William 11. Pittman [52] US. Cl 134/2, 134/29, 134/42,
148 615 R, 148 615 2, 252/135, 252/524, [57] ABSTRACT 252/526 Metal surfaces are cleaned, pr1or to phosphatmg or 51 Int. Cl C23g 1/14 the like, with Compositions containing alkali metal 5 Field f Search 5 5 7; 1311/2, 29 pecially sodium) silicates and chlorides, and prefera- 134/42, 40', l48/6.l5 R, 6.15 Z bly also containing surfactants and chelating agents. These compositions have cleaning power comparable 5 References Cited to phosphate-containing cleaners and cause less water UNITED STATES PATENTS pollution upon discharge into natural waterways. 2,322,349 6/1943 .lernstedt l48/6.l5 6 Claims, No Drawings 3,090,709 5/1963 Henricks l48/6.l5
CLEANING OF METALS WITIICOMPOSITIONS CONTAINING ALKALI METAL SILICATE AND CHLORIDE This application is a continuation-in-part of copending application Ser. No. 58,182, filed July 24, 1970, now abandoned.
This invention relates to methods for cleaning metal surfaces during processing thereof, especially prior to phosphating. More particularly, it relates toa method for cleaning a metal surface'which comprises contacting said surface with an aqueous cleaning composition wherein the active ingredientscomprise water-soluble alkali metal silicate and alkali metal chloride, the weight ratio of said silicate to said chloride being between about 4:1 and i021.
In the processing of metals, it is common practice to follow a drawing operation with a phosphating treatment to produce aphosphate coating on the metal which is resistant to corrosion and serves as a paint base. The metal emerging from the drawing operation almost always has foreign matter adhering to it, chiefly drawing oils and the like. Such foreign matter is extremely difficult to remove, but it must be removed before the metal'can be phosphated. It has been customarily removed by heavy-duty alkaline cleaners containing various combinations of ingredients such as phosphates, silicates and surfactants. Phosphate-containing cleaners are particularly effective. However, the recent emphasis'on avoidance of water pollution has aroused interest in cleaners whichdonot contain phosphate,
since phosphates apparently promote algae growth in natural waterways such as lakes and rivers into which the cleaners are discharged after use.
A principal object of the present invention, therefore, is to provide a new method for heavy-duty cleaning of metal surfaces.
A further object is to provide a metal cleaning method in which the use of phosphates is avoided or substantially avoided, thereby decreasing the tendency of such compositions to pollute water.
Other objects will in part be obvious and will in part appear hereinafter.
The essential ingredients in the compositions used in the method of this invention are a water-soluble alkali metal silicate and an alkali metal chloride. By alkali metal" is meant the metals in Group [A of the Periodic Table; that is, lithium, sodium, potassium, rubidium and cesium. Sodium and potassium are preferred, and because of their ready availability and low cost, the sodium salts are most often used.
Any water-soluble alkali metal silicate may be used in the method of this invention. Thus, suitable sodium silicates include sodium disilicate, Na Si O sodium metalsilicate, Na SiO and its hydrates; sodium orthosilicate, Na SiO and so-called water glass, which is a liquid mixture of various sodium silicates. Sodium metasilicate is, however, preferred.
The alkali metal chloride may likewise be from any suitable source, but the preferred chlorides consist of crystals with high absorbent power. Particularly useful is a form of common salt sold by the Morton Salt Company and identified as North Star Fine."
The weight ratio of silicate to chloride in the compositions used in the method of this invention should be between about 4:1 and Weight ratios on the order of 7:1 or 8:1 are preferred.
boxylic acids derived from long-chain alkyl-substituted imidazolines, of long-chain polycarboxylic acids, of betaine sulfonates derived from long-chain fatty acids,
and of sulfonates of oxyethylated amines. Surfactants are particularly desirable in the compositions used in the method of this invention because they. are ordinarily instrumental in starting the cleaning process which is continued by the alkaline ingredients.
The presence of chelating agents is preferred partly because of the absence of phosphates, which ordinarily serve that purpose when they are present. Suitable chelating agents include the various amainopolycarboxylic acids andtheir water-soluble salts, such as ethylenediaminetetraacetic acid, trimethylenediaminetetraacetic acid, nitrilotriacetic acid and the like. Particularly useful is the tetrasodium salt of ethylenediaminetetraacetic acid, sold under the trade name Versene.
The proportions of surfactants and chelating agents used are usually about 3-10 parts by weight per parts of active ingredients (excluding water).
Suitable for use as fillers and pH control agents are such materials as sodium carbonate (soda ash) and similar alkaline materials which are water-soluble and inexpensive.
For certain purposes, especially when the material to be removed from the surface is very stubborn and persistent, the compositions may also contain conditioners or activators of the type used to prepare metal surfaces for phosphating. Exemplary of such conditioners or activators are the titanium phosphate compositions described in US. Pat. No. 2,322,349.
The preferred cleaning compositions contain about 65-80 parts by weight of sodium metasilicate, about 5-15 parts of sodium chloride, about 5-15 parts of sodium carbonate, about 0-10 parts of ethylenediaminetetraacetic acid or a water-soluble salt thereof (an optional ingredient), about 4-l0 parts of at least one non-ionic or amphotenc surfactant, and optionally about 4-10 parts of colloidal titanium phosphate.
Exemplary concentrates for preparing the cleaning compositions used in the method of this invention are listed in the following table.
Parts by weight -Continued Parts by weight 1 2 3 Tergitol Min'Foam 1X" (modified linear alcohol ethoxylate) Triton QS-lS" (sulfonate of polyethoxylated C, tertiary alk primary amine) Colloidal titanium phosphate For use, concentrates such as those listed in the table are dissolved in water to a concentration of about 5-2O grams per liter, preferably about 5-10 grams per liter. The aqueous cleaner thus prepared is contacted with the metal surface by spraying, dipping or the like, preferably at a temperature of about 50l0OC. Contact between the metal and the cleaner is continued for a period of time sufficient to remove drawing oils and other foreign matters from the metal surface, usually about 30 seconds to 1 minute. The surface is then rinsed with water and a phosphate coating is applied thereto by conventional methods.
- The effectiveness of the method of this invention is shown in a series of tests in which various drawing oils are applied by brush to 4 inches X 8 inches cold-rolled steel panels which are then sprayed with cleaning compositions prepared from the concentrates of Examples 1.-3 by dilution with water to 7.5 grams per liter, the temperature of the cleaning composition during spraying being 71C. The cleaning compositions are used both pure and contaminated with 5, 10, and grams per liter of the drawing oil. The cleaning operation is continued for seconds, after which the steel panels are rinsed with water, phosphated with a phosphating solution of the type disclosed in U.S. Pat. No. 3,090,709 containing zinc, calcium and ammonium ions, and rinsed with ,a conventional chromiumcontaining rinse solution. The appearance of the phosphate coating is then evaluated to determine the effectiveness of the cleaner.
When tested by this method, the cleaners of Examples 1 and 2 gave results equal to those of comparable phosphate-containing cleaners at all levels of contamination, when used to remove ordinary drawing oils. Rust-preventive drawing oils were resistant to the cleaners of Examples 1 and -2 but were removed by the cleaner of Example 3, to a degree comparable to that of known heavy-duty phosphate cleaners.
' What is claimed is:
l. A method for cleaning the surface of metals during processing thereof which comprises contacting said surface at a temperature of about 50-100C. with an aqueous cleaning composition in the liquid state wherein the active ingredients comprise water-soluble alkali metal silicate and alkali metal chloride, the weight ratio of said silicate to said chloride being between about 4:1 and 10:1.
2. A method according to claim I wherein the alkali metal is sodium.
3. A method according to claim 2 wherein the cleaning composition additionally contains at least one nonionic or amphoteric surfactant and a chelating agent, each being present in the amount of about 3l0 parts by weight per parts of active ingredients.
4. A method according to claim 3 wherein the chelating agent is ethylenediaminetetraacetic acid or a watersoluble salt thereof.
5. A method according to claim 2 wherein the active ingredients in said cleaning composition consist essentially of about 65-80 parts by weight of sodium metasilicate, about 51 5 parts of sodium chloride, about 5-15 parts of sodium carbonate, about 0-10 parts of ethylenediaminetetraacetic acid or a water-soluble salt thereof, and about 4-10 parts of at least one non-ionic or amphoteric surfactant, said ingredients being dissolved in water to a concentration of about 5-20 grams per liter.
6. A method according to claim 5 wherein the composition additionally contains about 4-10 parts by weight of colloidal titanium phosphate.
Claims (6)
1. A METHOD FOR CLEANING THE SURFACE OF METALS DURING PROCESSING THEREOF WHICH COMPRISES CONTACTING SAID SURFACE AT A TEMPERATURE OF ABOUT 50*-100*C WITH AN AQUEOUS CLEANING COMPOSITION IN THE LIQUID STATE WHEREIN THE ACTIVE INGREDIENTS COMPRISE WATER-SOLUBLE ALKALI METAL SILICATE AND ALKALI METAL CHLORIDE, THE WEIGHT RATIO OF SAID SILICATE TO SAID CHLORIDE BEING BETWEEN ABOUT 4:1 AND 10:1.
2. A method according to claim 1 wherein the alkali metal is sodium.
3. A method according to claim 2 wherein the cleaning composition additionally contains at least one non-ionic or amphoteric surfactant and a chelating agent, each being present in the amount of about 3-10 parts by weight per 100 parts of active ingredients.
4. A method according to claim 3 wherein the chelating agent is ethylenediaminetetraacetic acid or a water-soluble salt thereof.
5. A method according to claim 2 wherein the active ingredients in said cleaning composition consist essentially of about 65-80 parts by weight of sodium metasilicate, about 5-15 parts of sodium chloride, about 5-15 parts of sodium carbonate, about 0-10 parts of ethylenediaminetetraacetic acid or a water-soluble salt thereof, and about 4-10 parts of at least one non-ionic or amphoteric surfactant, said ingredients being dissolved in water to a concentration of about 5-20 grams per liter.
6. A method accordIng to claim 5 wherein the composition additionally contains about 4-10 parts by weight of colloidal titanium phosphate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00273253A US3847663A (en) | 1970-07-24 | 1972-07-19 | Cleaning of metals with compositions containing alkali metal silicate and chloride |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US5818270A | 1970-07-24 | 1970-07-24 | |
| US00273253A US3847663A (en) | 1970-07-24 | 1972-07-19 | Cleaning of metals with compositions containing alkali metal silicate and chloride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3847663A true US3847663A (en) | 1974-11-12 |
Family
ID=26737336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00273253A Expired - Lifetime US3847663A (en) | 1970-07-24 | 1972-07-19 | Cleaning of metals with compositions containing alkali metal silicate and chloride |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3847663A (en) |
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3951681A (en) * | 1973-11-01 | 1976-04-20 | Kolene Corporation | Method for descaling ferrous metals |
| US3973998A (en) * | 1975-05-05 | 1976-08-10 | Celanese Coatings & Specialties Company | Rinsing solutions for acid cleaned iron and steel surfaces |
| US4065324A (en) * | 1976-12-16 | 1977-12-27 | Burton, Parsons And Company, Inc. | Contact lens cleaning solution |
| US4127423A (en) * | 1977-09-13 | 1978-11-28 | Burton, Parsons And Company, Inc. | Contact lens cleaning solution |
| US4379834A (en) * | 1978-11-17 | 1983-04-12 | Hoechst Aktiengesellschaft | Process for cleaning copper-containing metal surfaces |
| US4539133A (en) * | 1983-03-02 | 1985-09-03 | Lever Brothers Company | Process for preparation of an anti-corrosive aqueous liquid detergent composition |
| US4592785A (en) * | 1983-12-15 | 1986-06-03 | General Electric Company | Proteinaceous soil removal process |
| EP0310587A1 (en) * | 1987-09-30 | 1989-04-05 | Monsanto Company | Compositions and process for metal treatment |
| US4957568A (en) * | 1988-04-28 | 1990-09-18 | Henkel Kommanditgesellschaft Auf Aktien | Composition and process for activating metal surfaces prior to zinc phosphating and process for making said composition |
| US5064556A (en) * | 1991-02-13 | 1991-11-12 | Provision, Inc. | Golf club cleaning composition and method |
| US5096609A (en) * | 1990-02-15 | 1992-03-17 | Hoechst Aktiengesellschaft | Detergent containing sodium disilicate having a water content of 0.3 to 6% by weight |
| US5234505A (en) * | 1991-07-17 | 1993-08-10 | Church & Dwight Co., Inc. | Stabilization of silicate solutions |
| US5234506A (en) * | 1991-07-17 | 1993-08-10 | Church & Dwight Co., Inc. | Aqueous electronic circuit assembly cleaner and method |
| US5261967A (en) * | 1991-07-17 | 1993-11-16 | Church & Dwight Co, Inc. | Powdered electric circuit assembly cleaner |
| US5264046A (en) * | 1991-07-17 | 1993-11-23 | Church & Dwight Co., Inc. | Aqueous electronic circuit assembly cleaner and cleaning method |
| US5264047A (en) * | 1991-07-17 | 1993-11-23 | Church & Dwight Co., Inc. | Low foaming effective hydrotrope |
| US5282992A (en) * | 1992-04-07 | 1994-02-01 | Betz Laboratories, Inc. | Lubricating metal cleaner additive |
| US5431847A (en) * | 1991-07-17 | 1995-07-11 | Charles B. Barris | Aqueous cleaning concentrates |
| US5433885A (en) * | 1991-07-17 | 1995-07-18 | Church & Dwight Co., Inc. | Stabilization of silicate solutions |
| USRE35017E (en) * | 1991-07-17 | 1995-08-15 | Church & Dwight Co., Inc. | Method for removing soldering flux with alkaline salts, an alkali metal silicate and anionic polymer |
| US5443651A (en) * | 1990-02-06 | 1995-08-22 | Monsanto Company | Process for metal cleaning |
| USRE35045E (en) * | 1991-07-17 | 1995-10-03 | Church & Dwight Co., Inc. | Method for removing soldering flux with alkaline metal carbonate salts and an alkali metal silicate |
| USRE35115E (en) * | 1991-07-17 | 1995-12-12 | Church & Dwight Co. Inc. | Low foaming effective hydrotrope |
| WO1998039498A1 (en) * | 1997-03-07 | 1998-09-11 | Henkel Corporation | Conditioning metal surfaces prior to phosphate conversion coating |
| US6214132B1 (en) * | 1997-03-07 | 2001-04-10 | Henkel Corporation | Conditioning metal surfaces prior to phosphate conversion coating |
| CN101608314B (en) * | 2008-06-16 | 2011-02-23 | 南京科润工业介质有限公司 | Anti-emulsification water-soluble metal washing agent |
| CN105274547A (en) * | 2015-11-10 | 2016-01-27 | 荆门市拓达科技有限公司 | Efficient water-based cleaning agent |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2044467A (en) * | 1931-05-27 | 1936-06-16 | Philadelphia Quartz Co | Cleansing preparation |
| US2322349A (en) * | 1941-10-25 | 1943-06-22 | Westinghouse Electric & Mfg Co | Corrosion resistant coating for metal surfaces |
| US2440837A (en) * | 1943-07-28 | 1948-05-04 | J H Shoemaker | Metal cleaning composition |
| US2490062A (en) * | 1949-01-21 | 1949-12-06 | Westinghouse Electric Corp | Cleaning and activating compositions and use thereof in producing protective phosphate coatings on metal surfaces |
| US2956026A (en) * | 1955-03-22 | 1960-10-11 | California Research Corp | Sulfonate detergent compositions |
| US3090709A (en) * | 1953-08-10 | 1963-05-21 | Lubrizol Corp | Phosphate coating of metals |
| GB935733A (en) * | 1961-03-16 | 1963-09-04 | Basf Ag | Detergents and cleaning products |
| US3368978A (en) * | 1964-12-28 | 1968-02-13 | Monsanto Co | Builder compositions and detergent compositions using same |
-
1972
- 1972-07-19 US US00273253A patent/US3847663A/en not_active Expired - Lifetime
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2044467A (en) * | 1931-05-27 | 1936-06-16 | Philadelphia Quartz Co | Cleansing preparation |
| US2322349A (en) * | 1941-10-25 | 1943-06-22 | Westinghouse Electric & Mfg Co | Corrosion resistant coating for metal surfaces |
| US2440837A (en) * | 1943-07-28 | 1948-05-04 | J H Shoemaker | Metal cleaning composition |
| US2490062A (en) * | 1949-01-21 | 1949-12-06 | Westinghouse Electric Corp | Cleaning and activating compositions and use thereof in producing protective phosphate coatings on metal surfaces |
| US3090709A (en) * | 1953-08-10 | 1963-05-21 | Lubrizol Corp | Phosphate coating of metals |
| US2956026A (en) * | 1955-03-22 | 1960-10-11 | California Research Corp | Sulfonate detergent compositions |
| GB935733A (en) * | 1961-03-16 | 1963-09-04 | Basf Ag | Detergents and cleaning products |
| US3368978A (en) * | 1964-12-28 | 1968-02-13 | Monsanto Co | Builder compositions and detergent compositions using same |
Non-Patent Citations (1)
| Title |
|---|
| Bennett, The Chemical Formulary, Vol. X111, 1967, page 361. * |
Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3951681A (en) * | 1973-11-01 | 1976-04-20 | Kolene Corporation | Method for descaling ferrous metals |
| US3973998A (en) * | 1975-05-05 | 1976-08-10 | Celanese Coatings & Specialties Company | Rinsing solutions for acid cleaned iron and steel surfaces |
| US4065324A (en) * | 1976-12-16 | 1977-12-27 | Burton, Parsons And Company, Inc. | Contact lens cleaning solution |
| US4127423A (en) * | 1977-09-13 | 1978-11-28 | Burton, Parsons And Company, Inc. | Contact lens cleaning solution |
| US4379834A (en) * | 1978-11-17 | 1983-04-12 | Hoechst Aktiengesellschaft | Process for cleaning copper-containing metal surfaces |
| US4539133A (en) * | 1983-03-02 | 1985-09-03 | Lever Brothers Company | Process for preparation of an anti-corrosive aqueous liquid detergent composition |
| US4592785A (en) * | 1983-12-15 | 1986-06-03 | General Electric Company | Proteinaceous soil removal process |
| EP0310587A1 (en) * | 1987-09-30 | 1989-04-05 | Monsanto Company | Compositions and process for metal treatment |
| US4957568A (en) * | 1988-04-28 | 1990-09-18 | Henkel Kommanditgesellschaft Auf Aktien | Composition and process for activating metal surfaces prior to zinc phosphating and process for making said composition |
| US5443651A (en) * | 1990-02-06 | 1995-08-22 | Monsanto Company | Process for metal cleaning |
| US5096609A (en) * | 1990-02-15 | 1992-03-17 | Hoechst Aktiengesellschaft | Detergent containing sodium disilicate having a water content of 0.3 to 6% by weight |
| US5064556A (en) * | 1991-02-13 | 1991-11-12 | Provision, Inc. | Golf club cleaning composition and method |
| US5264046A (en) * | 1991-07-17 | 1993-11-23 | Church & Dwight Co., Inc. | Aqueous electronic circuit assembly cleaner and cleaning method |
| USRE35115E (en) * | 1991-07-17 | 1995-12-12 | Church & Dwight Co. Inc. | Low foaming effective hydrotrope |
| US5234506A (en) * | 1991-07-17 | 1993-08-10 | Church & Dwight Co., Inc. | Aqueous electronic circuit assembly cleaner and method |
| US5264047A (en) * | 1991-07-17 | 1993-11-23 | Church & Dwight Co., Inc. | Low foaming effective hydrotrope |
| US5549761A (en) * | 1991-07-17 | 1996-08-27 | Church & Dwight Co., Inc. | Method for removing rosin soldering flux from a printed wiring board |
| US5261967A (en) * | 1991-07-17 | 1993-11-16 | Church & Dwight Co, Inc. | Powdered electric circuit assembly cleaner |
| US5393448A (en) * | 1991-07-17 | 1995-02-28 | Church & Dwight Co., Inc. | Aqueous electronic circuit assembly cleaner and method |
| US5397495A (en) * | 1991-07-17 | 1995-03-14 | Church & Dwight Co. Inc. | Stabilization of silicate solutions |
| US5431847A (en) * | 1991-07-17 | 1995-07-11 | Charles B. Barris | Aqueous cleaning concentrates |
| US5433885A (en) * | 1991-07-17 | 1995-07-18 | Church & Dwight Co., Inc. | Stabilization of silicate solutions |
| USRE35017E (en) * | 1991-07-17 | 1995-08-15 | Church & Dwight Co., Inc. | Method for removing soldering flux with alkaline salts, an alkali metal silicate and anionic polymer |
| US5234505A (en) * | 1991-07-17 | 1993-08-10 | Church & Dwight Co., Inc. | Stabilization of silicate solutions |
| USRE35045E (en) * | 1991-07-17 | 1995-10-03 | Church & Dwight Co., Inc. | Method for removing soldering flux with alkaline metal carbonate salts and an alkali metal silicate |
| US5282992A (en) * | 1992-04-07 | 1994-02-01 | Betz Laboratories, Inc. | Lubricating metal cleaner additive |
| WO1993025727A1 (en) * | 1992-06-10 | 1993-12-23 | Church & Dwight Company, Inc. | Low foaming effective hydrotrope |
| WO1998039498A1 (en) * | 1997-03-07 | 1998-09-11 | Henkel Corporation | Conditioning metal surfaces prior to phosphate conversion coating |
| US6214132B1 (en) * | 1997-03-07 | 2001-04-10 | Henkel Corporation | Conditioning metal surfaces prior to phosphate conversion coating |
| CN101608314B (en) * | 2008-06-16 | 2011-02-23 | 南京科润工业介质有限公司 | Anti-emulsification water-soluble metal washing agent |
| CN105274547A (en) * | 2015-11-10 | 2016-01-27 | 荆门市拓达科技有限公司 | Efficient water-based cleaning agent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: MAN-GILL CHEMICAL COMPANY, 23000 ST. CLAIR AVE., C Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE JUNE 30, 1981.;ASSIGNOR:ROHCO, INC., AN OH CORP.;REEL/FRAME:003928/0049 Effective date: 19810630 |