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US2832729A - Electrodeposition of iron-zinc alloys - Google Patents

Electrodeposition of iron-zinc alloys Download PDF

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US2832729A
US2832729A US447402A US44740254A US2832729A US 2832729 A US2832729 A US 2832729A US 447402 A US447402 A US 447402A US 44740254 A US44740254 A US 44740254A US 2832729 A US2832729 A US 2832729A
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iron
zinc
nickel
ferrous
bath
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US447402A
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William H Safranek
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Rockwell Spring and Axle Co
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Rockwell Spring and Axle Co
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Priority to GB211/55A priority patent/GB779888A/en
Priority to DER16265A priority patent/DE1020845B/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C25D3/562—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of iron or nickel or cobalt
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc

Definitions

  • This invention relates to electroplating. More particularly, it relates to an iron-alloy electrodeposit.
  • a layer of copper is plated on the polished steel using special baths which produce fine-grained, leveling-type plates.
  • a layer of nickel is then plated on the copper.
  • the superpositioning of the fine-grained copper undercoat improves the buifability of the nickel plate, with the result that bufling costs are markedly reduced.
  • the copper-plating step is nearly as costly as the savings made in the bufiing operation. Also, special addition agents and equipment are required.
  • a ductile and leveling-type iron-alloy plate can be electrodeposited.
  • This iron-zinc-alloy electrodeposit fills in polishing scratches and other irregularities in the surface of the basis metal so that the plated surface is smoother than the original basis metal surface.
  • This leveling iron-alloy plate can be overplated with bright nickel plate, such as the ductile and leveling nickel.
  • one of the objects of this invention is to provide a ductile iron-alloy coating.
  • Another object is to provide economical means for smoothing polished steel surfaces prior to plating with chromium or nickel and chromium.
  • a further object is to improve the corrosion protection afforded by iron electroplates by codepositing zinc or zinc and nickel with the iron.
  • this invention relates to electrodepositing an iron-zinc alloy from an aqueous bath comprising ferrous ions and zinc ions.
  • the electroplate produced by this process contains from 2 to percent zinc, and the balance iron, and is both leveling and ductile.
  • the plate may also contain from 3 to 16 percent nickel replacing a part of the iron.
  • the ferrous ions are introduced into the bath by means of iron powder or soluble ferrous salts such as ferrous sulfate, ferrous ammonium sulfate, or ferrous sulfamate.
  • the ferrous iron concentration can vary from 20 to 100 g./l. about 35 and g./l. is preferred for best leveling and ductility.
  • Oxidation by air or some other oxidizing agent may cause the ferrous iron to be oxidized to ferric iron.
  • the ferric iron concentration should not exceed 0.3 g./l.
  • the build-up of the ferric iron concentration may be avoided by using a large iron anode area. It may also be desirable to immerse in the bath iron rods which are not connected to the anodes.- Ferric iron in' the bath will be substantially reduced to ferrous iron by reaction with these iron rods. Iron or zinc powder may also be introduced into the bath for this purpose.
  • the zinc may be added to the bath either in the form of zinc powder, or as a soluble zinc salt, such as zinc sulfate.
  • concentration of zinc in the bath depends upon the iron concentration; the ratio of zinc to iron is between 0.004 and 0.05 to l for depositing the ductile,
  • the zinc concentration is between 0.25 and 2.5 g./l.
  • iron and zinc other metals may be added to the bath for improving the physical properties of the plate, or its corrosion resistance.
  • nickel to the bath in the form of nickel sulfate, nickel ammonium sulfate, or nickel sulfamate in amount to give a nickel-iron ratio of between 0.05 and 1.25 to 1, will result in iron-rich alloy plate containing, in addition to the zinc, about 3 to 16 percent nickel, which, in combination with the zinc assists in improving the ductility, the leveling action, and the corrosion resistance of the iron-alloy plate.
  • the pH of the bath is preferably adjusted to between 1.5 and 3.5 by adding sulfuric acid to reduce the pH or ammonium hydroxide to raise it, as required.
  • the bath may be operated outside this range for short periods of time, but operating at a pH greater than about 3.5 willcause precipitation of the ferrous iron.
  • the temperature of the bath should be maintained at between aboutv and 220 F. for satisfactory plating. For best leveling and ductility, a temperature range of from to F. is preferred.
  • Suitable anodes for electrodepositing the alloy of this invention include iron rods containing very low carbon or low-carbon steel sheet, such as SAE 1010 or SAE 1020. Iron anodes may be used continuously for long operating periods without the necessity of cleaning or otherwise treating them. If steel anodes are used, it may be necessary to periodically remove carbon sludge formed on the surface of the anode during continuous operation. Best results are obtained by bagging the anodes with a material such as cotton duck.
  • a buffer such as boric acid or ammonium sulfate.
  • a wetting agent may also be used to prevent pitting in the deposits. Suitable wetting agents include sulfated oxyalcohols, such as the product made by reacting coconut alcohol with ethylene oxide, followed by sulfating with sulfuric acid.
  • Sulfated alcohols such as sodium lauryl sulfatemay also I be used.
  • Example I vA 0.001-inch alloy plate containing about 5 percent.
  • the anodes were SAE 1010 steel plate, about Aa-iuch thick, covered with cotton duck bags.
  • the iron consumed by plating was replenished by the anodes.
  • the zinc codeposited with the iron was replenished by adding zinc powder at the rate of about 3.5. grams per 100 ampere hours of operation. Each time zinc powder was dis solved, a small quantity of sulfuric. acid was added to keep the pH of the bath in the range of 2.1 to 2.4.
  • the resulting electroplate had a roughness of from 11 to 13 R. M- S. rnicroinches when deposited over polished steel having a roughness of from 13 to 16 R. M. S. microinches, or an average leveling of percent.
  • Example II A bath was operated similar to that of Example 1, except that the zinc sulfate concentration was 6.2 g./l., the pH was 2.5, and the temperature was l60- -3 F.
  • the resulting 0.001-inch electroplate contained about 12 percent zinc, and had a roughness of from 14 to 17 R. M. S. microinches, when plated over polished steel having a roughness of from 19 to 23 R. M. S. microinches. The average reduction in roughness was 25 percent.
  • Example III A 0.00l-inch alloy plate containing about 2 percent zinc and the balance iron was electrodeposited on steel using the following bath and operating conditions.
  • Ferrous sulfamate [Fe(SO NH g./l 160.0 Boric acid [H BO l g./l 30.0 Zinc sulfate [ZnSO -7H O] g./l 0.9 Water Balance pH 1.9 Temperature F 145 Cathode current density amp./sq. ft 50 Anode current density amp./sq. ft 25 Plating time min The workpiece was agitated by moving it in the bath 30 cycles per minute, using a 1-inch stroke.
  • the resulting electroplate had a roughness of from 9 to 12 R. M. S. microinches over a polished steel plate having a roughness of from 18 to 20 R. M. S. microinches, or an average leveling of percent.
  • Example IV A very good leveling and corrosion-resistant plate was produced containing 1.5 percent Zinc, 16 percent nickel,
  • Ferrous sulfate [FeSO -7H Ol g./l 300.0 Boric acid [H ....g./l.... 30.0 Nickel sulfate [NiSO -7H O] g./l 350.0 Sulfated oxyalcohol g./l 0.5 Zinc dust g./l 0.25 Water Balance pH 2.2 Temperature F l30 Cathode current density amp./sq. ft 50 A comparable bath, omitting the zinc, produced plates which were highly stressed and were cracked, especially near the edges. The zinc addition reduced the stress and eliminated the cracking.
  • the electrodeposition of zinc with iron also resulted in a more ductile plate.
  • Iron was plated on a fii-inch steel panel, and the plated panel was bent around a l/z-inch diameter arbor. A bend of only five degrees caused severe cracking in the iron plate.
  • Similar steel panels plated with the iron-zinc alloy of this invention could be bent at least 25 degrees and usually as much as 45 degrees before the first appearance of microscopic cracks. Even after a bend of degrees, the cracking of the iron-zinc alloy plating was less severe than that resulting from bending the iron plating only five degrees. 7
  • a nickel plate deposited directly on the 0.00l-inch iron-zinc deposits was much easier to bufi. to desired brightness than nickel plated directly on polished steel.
  • a decorative chromium plate (0.0000l-inch) had superior corrosion resistance when plated over the nickel, iron-zinc, polished steel combination than when plated over a nickel and polished steel alone.
  • the following table shows the results of salt spray-fogtest:
  • the alloy plating produced by this process contains from 2 to 15 percent zinc, and the balance iron, and is a ductile and leveling plate. Additionally, the plate may contain from 3' to 16 percent nickel.
  • the process of electrodepositing a leveling, ductile, iron-zinc-alloy plate which comprises electrolyzing an aqueous acid solution containing a ferrous compound with ferrous ion in a concentration of 20 to g./l., and a zinc compound with zinc ion in a zinc-ferrous ratio of from 0.004 to 0.05.
  • the process of clectrodepositing a leveling, ductile, iron-zinc-nickel-alloy plate which comprises electrolyzing an aqueous acid solution containing a ferrous compound with ferrous ion in a concentration of 20 to 100 g./l., a zinc compound with zinc ion in a zinc-ferrous ratio of from 0.004 to 0.05, and a nickel compound with nickel ion in a nickel-ferrous ratio of from 0.05 to 1.25.
  • a composition of matter useful in the deposition of iron-zinc-alloy electroplates which comprises an aqueous solution of a ferrous compound of from 20 to 100 g./l.
  • a composition of matter useful in the deposition 6502 Babcock June 1849 of iron-zinc-nickel-alloy electrodeposit which comprises 5 8114 Boyden May 1851 an aqueous solution containing a ferrous compound with 1,072,091 cowper'coles Sept 1913 ferrous ion in a concentration of 20 to 100 g./l., a zinc 1,791,642 Schulte 1931 compound with zinc ion in a zinc-ferrous ratio of from 2,418,970 Domoe 1947 0.004 to 0.05, and a nickel compound with nickel ion in a nickel-ferrous ratio of from 0.05 to 1.25. 10

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Description

Uni sd St s awfl r ELECTRODEPUSITKGN F IRON-ZINC ALLOYS William H. Safranelr, Columbus, Ohio, assignor, by mesne assignments, to Rockwell Spring and Axle Company, Coraopolis, Pm, a corporation of Pennsylvania No Drawing. Application August 2, 1954 Serial No. 447,402
6 Claims. (Cl. 204-43) This invention relates to electroplating. More particularly, it relates to an iron-alloy electrodeposit.
In the plating of steel parts with chromium, it is necessary to polish and then buff the surface of the steel before applying the chromium coating. Frequently,'a layer of nickel is electroplated on the steel, and the nickel is then buffed before the final plating with chromium. The bufiing operations are costly steps because large quantities of buffing materials are consumed, and much time is required to perform this operation.
Alternatively, a layer of copper is plated on the polished steel using special baths which produce fine-grained, leveling-type plates. A layer of nickel is then plated on the copper. The superpositioning of the fine-grained copper undercoat improves the buifability of the nickel plate, with the result that bufling costs are markedly reduced. However, the copper-plating step is nearly as costly as the savings made in the bufiing operation. Also, special addition agents and equipment are required.
It has now been found that by the method and bath of this invention, a ductile and leveling-type iron-alloy plate can be electrodeposited. This iron-zinc-alloy electrodeposit fills in polishing scratches and other irregularities in the surface of the basis metal so that the plated surface is smoother than the original basis metal surface. This leveling iron-alloy plate can be overplated with bright nickel plate, such as the ductile and leveling nickel.
plate disclosed in copending applications Serial Nos. 368,903, filed July 20, 1953; 369,223, now abandoned, filed July 20, 1953, and 369,224, now Patent No. 2,748,-
068, filed July 20, 1953. The combination of a leveling A iron alloy and nickel plate completely obviates the necessity of a buffing step, since the plating operations provide an attractive final appearance, even when the polished steel surface had a roughness before plating, of 20 R. M. S. microinches or more.
Should a dull or semibright nickel be used in place of bright nickel plating, the deposition of the iron-zinc alloy prior to the nickel plating greatly improves the butfability of the dull nickel plate.
Accordingly, one of the objects of this invention is to provide a ductile iron-alloy coating.
Another object is to provide economical means for smoothing polished steel surfaces prior to plating with chromium or nickel and chromium.
A further object is to improve the corrosion protection afforded by iron electroplates by codepositing zinc or zinc and nickel with the iron.
Other objects and advantageous features will be apparent from the following detailed description.
In general, this invention relates to electrodepositing an iron-zinc alloy from an aqueous bath comprising ferrous ions and zinc ions. The electroplate produced by this process contains from 2 to percent zinc, and the balance iron, and is both leveling and ductile. The plate may also contain from 3 to 16 percent nickel replacing a part of the iron.
The ferrous ions are introduced into the bath by means of iron powder or soluble ferrous salts such as ferrous sulfate, ferrous ammonium sulfate, or ferrous sulfamate. The ferrous iron concentration can vary from 20 to 100 g./l. about 35 and g./l. is preferred for best leveling and ductility.
Oxidation by air or some other oxidizing agent may cause the ferrous iron to be oxidized to ferric iron. However, the ferric iron concentration should not exceed 0.3 g./l. The build-up of the ferric iron concentration may be avoided by using a large iron anode area. It may also be desirable to immerse in the bath iron rods which are not connected to the anodes.- Ferric iron in' the bath will be substantially reduced to ferrous iron by reaction with these iron rods. Iron or zinc powder may also be introduced into the bath for this purpose.
The zinc may be added to the bath either in the form of zinc powder, or as a soluble zinc salt, such as zinc sulfate. The concentration of zinc in the bath depends upon the iron concentration; the ratio of zinc to iron is between 0.004 and 0.05 to l for depositing the ductile,
leveling iron alloy containing 2 to 15 percent zinc. Thus, in a bath containing 50 g.,/l. ferrous iron, the zinc concentration is between 0.25 and 2.5 g./l.
In addition to iron and zinc, other metals may be added to the bath for improving the physical properties of the plate, or its corrosion resistance. For example, the addition of nickel to the bath in the form of nickel sulfate, nickel ammonium sulfate, or nickel sulfamate in amount to give a nickel-iron ratio of between 0.05 and 1.25 to 1, will result in iron-rich alloy plate containing, in addition to the zinc, about 3 to 16 percent nickel, which, in combination with the zinc assists in improving the ductility, the leveling action, and the corrosion resistance of the iron-alloy plate.
The pH of the bath is preferably adjusted to between 1.5 and 3.5 by adding sulfuric acid to reduce the pH or ammonium hydroxide to raise it, as required. The bath may be operated outside this range for short periods of time, but operating at a pH greater than about 3.5 willcause precipitation of the ferrous iron.
The temperature of the bath should be maintained at between aboutv and 220 F. for satisfactory plating. For best leveling and ductility, a temperature range of from to F. is preferred.
. Suitable anodes for electrodepositing the alloy of this invention include iron rods containing very low carbon or low-carbon steel sheet, such as SAE 1010 or SAE 1020. Iron anodes may be used continuously for long operating periods without the necessity of cleaning or otherwise treating them. If steel anodes are used, it may be necessary to periodically remove carbon sludge formed on the surface of the anode during continuous operation. Best results are obtained by bagging the anodes with a material such as cotton duck.
It may be desirable to add to the plating bath a buffer, such as boric acid or ammonium sulfate. A wetting agent may also be used to prevent pitting in the deposits. Suitable wetting agents include sulfated oxyalcohols, such as the product made by reacting coconut alcohol with ethylene oxide, followed by sulfating with sulfuric acid.
Sulfated alcohols, such as sodium lauryl sulfatemay also I be used.
vention with greater particularity:
Example I vA 0.001-inch alloy plate containing about 5 percent.
Patented Apr. 29, 1958 3 However, a ferrous iron concentration between.
sesame Ferrous sulfate [FeSO -6H Ol g./-l 300.0 Boric acid [H 50 g./l 30.0 Sulfated oxyalcohol g./l 0.5 Zinc sulfate [ZnSo -7H Ol g./l 1.8 Water Balance pH 2.3 Temperature F.. 135:3 Cathode current density amp./ sq. ft 50 Anode current density amp./sq. ft" 25 Plating time min 30 The workpiece was agitated by moving it in the bath 30 cycles per minute using a 1-inch stroke.
The anodes were SAE 1010 steel plate, about Aa-iuch thick, covered with cotton duck bags. The iron consumed by plating was replenished by the anodes. The zinc codeposited with the iron was replenished by adding zinc powder at the rate of about 3.5. grams per 100 ampere hours of operation. Each time zinc powder was dis solved, a small quantity of sulfuric. acid was added to keep the pH of the bath in the range of 2.1 to 2.4.
The resulting electroplate had a roughness of from 11 to 13 R. M- S. rnicroinches when deposited over polished steel having a roughness of from 13 to 16 R. M. S. microinches, or an average leveling of percent.
Example II A bath was operated similar to that of Example 1, except that the zinc sulfate concentration was 6.2 g./l., the pH was 2.5, and the temperature was l60- -3 F.
The resulting 0.001-inch electroplate contained about 12 percent zinc, and had a roughness of from 14 to 17 R. M. S. microinches, when plated over polished steel having a roughness of from 19 to 23 R. M. S. microinches. The average reduction in roughness was 25 percent.
Example III A 0.00l-inch alloy plate containing about 2 percent zinc and the balance iron was electrodeposited on steel using the following bath and operating conditions.
Ferrous sulfamate [Fe(SO NH g./l 160.0 Boric acid [H BO l g./l 30.0 Zinc sulfate [ZnSO -7H O] g./l 0.9 Water Balance pH 1.9 Temperature F 145 Cathode current density amp./sq. ft 50 Anode current density amp./sq. ft 25 Plating time min The workpiece was agitated by moving it in the bath 30 cycles per minute, using a 1-inch stroke.
The resulting electroplate had a roughness of from 9 to 12 R. M. S. microinches over a polished steel plate having a roughness of from 18 to 20 R. M. S. microinches, or an average leveling of percent.
Example IV Example V A very good leveling and corrosion-resistant plate was produced containing 1.5 percent Zinc, 16 percent nickel,
"r; and the balance iron. The bath used had the following composition:
Ferrous sulfate [FeSO -7H Ol g./l 300.0 Boric acid [H ....g./l.... 30.0 Nickel sulfate [NiSO -7H O] g./l 350.0 Sulfated oxyalcohol g./l 0.5 Zinc dust g./l 0.25 Water Balance pH 2.2 Temperature F l30 Cathode current density amp./sq. ft 50 A comparable bath, omitting the zinc, produced plates which were highly stressed and were cracked, especially near the edges. The zinc addition reduced the stress and eliminated the cracking.
The electrodeposition of zinc with iron also resulted in a more ductile plate. Iron was plated on a fii-inch steel panel, and the plated panel was bent around a l/z-inch diameter arbor. A bend of only five degrees caused severe cracking in the iron plate.
Similar steel panels plated with the iron-zinc alloy of this invention could be bent at least 25 degrees and usually as much as 45 degrees before the first appearance of microscopic cracks. Even after a bend of degrees, the cracking of the iron-zinc alloy plating was less severe than that resulting from bending the iron plating only five degrees. 7
A nickel plate deposited directly on the 0.00l-inch iron-zinc deposits was much easier to bufi. to desired brightness than nickel plated directly on polished steel. Also, a decorative chromium plate (0.0000l-inch) had superior corrosion resistance when plated over the nickel, iron-zinc, polished steel combination than when plated over a nickel and polished steel alone. The following table shows the results of salt spray-fogtest:
In summary, there has been disclosed a novel bath and process for electrodepositing an iron-alloy plate. The alloy plating produced by this process contains from 2 to 15 percent zinc, and the balance iron, and is a ductile and leveling plate. Additionally, the plate may contain from 3' to 16 percent nickel. Although specific examples have been given to illustrate this invention, it is not intended to be limited thereby, but only by the scope of the specification and claims.
What is claimed is:
1. The process of electrodepositing a leveling, ductile, iron-zinc-alloy plate which comprises electrolyzing an aqueous acid solution containing a ferrous compound with ferrous ion in a concentration of 20 to g./l., and a zinc compound with zinc ion in a zinc-ferrous ratio of from 0.004 to 0.05.
2. The method according to claim 1 wherein the temperature of the solution is from 100 to 220 F.
3. The method according to claim 1 wherein the pH is from 1.5 to 3.5.
4. The process of clectrodepositing a leveling, ductile, iron-zinc-nickel-alloy plate which comprises electrolyzing an aqueous acid solution containing a ferrous compound with ferrous ion in a concentration of 20 to 100 g./l., a zinc compound with zinc ion in a zinc-ferrous ratio of from 0.004 to 0.05, and a nickel compound with nickel ion in a nickel-ferrous ratio of from 0.05 to 1.25.
5. A composition of matter useful in the deposition of iron-zinc-alloy electroplates which comprises an aqueous solution of a ferrous compound of from 20 to 100 g./l. References Cited in the file of this patent ferrous ion and a zinc compound with zinc ion in a zinc- UNITED STATES PATENTS ferrous ratio of from 0.004 to 0.05.
6. A composition of matter useful in the deposition 6502 Babcock June 1849 of iron-zinc-nickel-alloy electrodeposit which comprises 5 8114 Boyden May 1851 an aqueous solution containing a ferrous compound with 1,072,091 cowper'coles Sept 1913 ferrous ion in a concentration of 20 to 100 g./l., a zinc 1,791,642 Schulte 1931 compound with zinc ion in a zinc-ferrous ratio of from 2,418,970 Domoe 1947 0.004 to 0.05, and a nickel compound with nickel ion in a nickel-ferrous ratio of from 0.05 to 1.25. 10

Claims (1)

1. THE PROCESS OF ELECTRODEPOSING A LEVELING, DUCTILE, IRON-ZINC-ALLOY PLATE WHICH COMPRISES ELECTROLYZING AN AQUEOUS ACID SOLUTION CONTAINING A FERROUS COMPOUND WITH FERROUS ION IN A CONCENTRATION OF 20 TO 100 G./L., AND A ZINC COMPOUND WITH ZINC ION IN A ZINC-FERROUS RATIO OF FROM 0.004 TO 0.05.
US447402A 1954-08-02 1954-08-02 Electrodeposition of iron-zinc alloys Expired - Lifetime US2832729A (en)

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US447402A US2832729A (en) 1954-08-02 1954-08-02 Electrodeposition of iron-zinc alloys
GB211/55A GB779888A (en) 1954-08-02 1955-01-04 Electrodeposition of iron-zinc alloys
DER16265A DE1020845B (en) 1954-08-02 1955-03-22 Bath and process for the galvanic deposition of an iron-zinc or iron-zinc-nickel alloy

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239437A (en) * 1960-07-28 1966-03-08 Atomic Energy Authority Uk Methods of depositing magnetic alloy films
EP0047987A1 (en) * 1980-09-12 1982-03-24 Nippon Steel Corporation Cationic electrodeposition lacquer-coated steel material
US4329402A (en) * 1978-09-27 1982-05-11 Whyco Chromium Co., Inc. Micro-throwing alloy undercoatings and method for improving corrosion resistance
JPS5964800A (en) * 1982-10-04 1984-04-12 Sumitomo Metal Ind Ltd Recycling treatment method for iron-based electroplating liquid
EP0144711A3 (en) * 1983-11-01 1986-02-05 Nippon Steel Corporation Process for electroplating a metallic material with an iron-zinc alloy
US4772362A (en) * 1985-12-09 1988-09-20 Omi International Corporation Zinc alloy electrolyte and process

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Publication number Priority date Publication date Assignee Title
JPS569386A (en) * 1979-07-02 1981-01-30 Nippon Kokan Kk <Nkk> Production of electro-zinc plated steel plate
US4351713A (en) * 1979-08-22 1982-09-28 Thomas Steel Strip Corp. Electro-co-deposition of corrosion resistant nickel/zinc alloys onto steel substrates
US4282073A (en) 1979-08-22 1981-08-04 Thomas Steel Strip Corporation Electro-co-deposition of corrosion resistant nickel/zinc alloys onto steel substrates
JPS5845394A (en) * 1981-09-14 1983-03-16 Nisshin Steel Co Ltd Method for preventing oxidation of iron ion in plating solution
DE202009012622U1 (en) * 2009-09-18 2011-02-10 Hqm Sachsenring Gmbh ball joint

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6502A (en) * 1849-06-05 Improvement in metallic alloys
US8114A (en) * 1851-05-27 Improvement in alloys of iron, zinc, and nickel
US1072091A (en) * 1912-11-23 1913-09-02 Sherard Osborn Cowper-Coles Process for protecting iron surfaces from corrosion.
US1791642A (en) * 1926-05-29 1931-02-10 Schulte Louis Process of plating aluminum
US2418970A (en) * 1942-09-05 1947-04-15 Pyrene Mfg Co Process of electrolytically depositing iron and iron alloys

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6502A (en) * 1849-06-05 Improvement in metallic alloys
US8114A (en) * 1851-05-27 Improvement in alloys of iron, zinc, and nickel
US1072091A (en) * 1912-11-23 1913-09-02 Sherard Osborn Cowper-Coles Process for protecting iron surfaces from corrosion.
US1791642A (en) * 1926-05-29 1931-02-10 Schulte Louis Process of plating aluminum
US2418970A (en) * 1942-09-05 1947-04-15 Pyrene Mfg Co Process of electrolytically depositing iron and iron alloys

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3239437A (en) * 1960-07-28 1966-03-08 Atomic Energy Authority Uk Methods of depositing magnetic alloy films
US4329402A (en) * 1978-09-27 1982-05-11 Whyco Chromium Co., Inc. Micro-throwing alloy undercoatings and method for improving corrosion resistance
EP0047987A1 (en) * 1980-09-12 1982-03-24 Nippon Steel Corporation Cationic electrodeposition lacquer-coated steel material
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DE1020845B (en) 1957-12-12

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