US2272216A - Method of coating copper and its alloys - Google Patents

Method of coating copper and its alloys Download PDF

Info

Publication number
US2272216A
US2272216A US358837A US35883740A US2272216A US 2272216 A US2272216 A US 2272216A US 358837 A US358837 A US 358837A US 35883740 A US35883740 A US 35883740A US 2272216 A US2272216 A US 2272216A
Authority
US
United States
Prior art keywords
copper
alloys
zinc
group
coating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US358837A
Inventor
Herman J Lodeesen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Parker Rust Proof Co
Original Assignee
Parker Rust Proof Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US212209A external-priority patent/US2233422A/en
Application filed by Parker Rust Proof Co filed Critical Parker Rust Proof Co
Priority to US358837A priority Critical patent/US2272216A/en
Application granted granted Critical
Publication of US2272216A publication Critical patent/US2272216A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • C23C22/05—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 using aqueous solutions
    • C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08—Orthophosphates
    • C23C22/10—Orthophosphates containing oxidants

Definitions

  • the present invention discloses a new and improved process for preparing the surface of eopper and its alloys to receive a siccative coa
  • a coating solution it has been found that the best results are obtained from the use of either zinc or manganese acid phosphate, although cadmium or magnesium acid phosphate may be employed.
  • Copper, and an alloy such as brass do not react the same insofar as their ability to take a coating is concerned.
  • a satisfactory solution for the coating of brass consists of a solution made up in the following manner:
  • the pieces to be treated may be submerged in the above outlined solutions, or the'solutions may be sprayed onto the work. If the article to be coated contains heavy grease the same should first be removed by any of the well-known grease solvents. If no such grease is present a hot water immersion or spray for approximately two minutes has been found very beneficial,
  • a copper compound such as copper carbonate or copper sulfate may be added before processing, when desired.
  • the following accelerating metals may also be used: antimony, nickel and silver.
  • the work may be immersed therein or if more convenient the solutions may be sprayed onto the work by means of any of the well-known spraying equipments.
  • a dilute solution of chromic acid, phosphoric acid, oxalic acid or a salt of iron, chromium or aluminum may be used, such as aluminum nitrate or sulfate, ferrous sulfate, ferric nitrate and chromic sulfate or nitrate.
  • a process for producing corrosion retarding coatings on articles of copper and its alloys which comprises subjecting th surface thereof to the action of a solution containing an acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides.
  • a process for producing corrosion retarding coatings on articles of copper and its alloys which comprises subjecting the surface thereof to the action of a solution containing an acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides, and thereafter subjecting the articles to a rinse in a solution containing an acid selected from the group consisting of chromic acid, phosphoric acid and oxalic acid.
  • an acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium
  • an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides
  • a process for producing corrosion retarding coatings on articles of copper and its alloys which comprises subjecting the surface thereof to the a c t 1on of a solution containing an acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides, and thereafter subjecting the articles to a rinse in a solution containing a salt selected from the group consisting of iron, chromium and aluminum.
  • An object of copper and its alloys having on the surface thereof an integral coating having the composition resulting from treating the copper metal object with a solution containingan acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium, and an oxidizing agent selected from the 7 duction of corrosion retarding coatings on articles of copper and its alloys comprising an acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium, and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides.
  • An object of copper and its alloys having on the surface thereof an integral coating resulting from treating the object with a solution containing an acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium, and an oxidizing agent selected from the group consisting of persulphates, permanganates. iodates, nitrites and peroxides and thereafter rinsed with a solution containing hexavalent chromium.
  • an acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium
  • an oxidizing agent selected from the group consisting of persulphates, permanganates. iodates, nitrites and peroxides and thereafter rinsed with a solution containing hexavalent chromium.
  • a process for producing corrosion retarding coatings on articles of copper and its alloys which comprises subjecting the surface thereof to the action of a solution containing zinc dihydrogen phosphate and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides.
  • a process for producing corrosion retarding coatings on articles of copper and its alloys which comprises subjecting the surface thereof to the action of a solution containing zinc dihydrogen phosphate and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides and rinsing the coated surface with a solution containing hexavalent chromium.
  • An object of copper and its alloys having on the surface thereof an integral coating having the composition resulting from treating the object with a solution containing zinc dihydrogen phosphate, and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides.

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)

Description

Patented Feb. 10, 1942 UNITED STATES PATENT OFFICE- METHOD OF COATING COPPER AND ITS ALLOYS Herman J. Lodeesen, Royal Oak, Mich., assignor to Parker Rust Proof Company, Detroit,
Mich.
No Drawing. Original application June 6, 1938,
Serial No. 212,209. Divided and this application September 28, 1940, Serial No. 358,837
Claims.
To 100 gallons of water, add- Pounds Manganese acid phosphate solution"- 40 Zinc carbonate 1.5 Hydrogen peroxide (30%) 2 problem for the reason that copper has a surface of such a nature that it prevents the proper ad hesion of paint to it. The peculiar characteristics of such a surface cannot be entirely overcome by any of the well-known cleaning methods so far evolved. The present invention discloses a new and improved process for preparing the surface of eopper and its alloys to receive a siccative coa In building up a coating solution, it has been found that the best results are obtained from the use of either zinc or manganese acid phosphate, although cadmium or magnesium acid phosphate may be employed. Copper, and an alloy such as brass, do not react the same insofar as their ability to take a coating is concerned. For example it has been found that a satisfactory solution for the coating of brass consists of a solution made up in the following manner:
To 100 gallons of water, add- Pounds Zinc dihydrogen phosphate 42 Ammonium persulfate 8 Time: 5 minutes at 200 F.
Other examples of solutions for coating brass are: v v
To 100 gallons of water, add- Pounds Manganese acid phosphate solution" 40 Zinc carbonate 1 Sodium nitrite 4 Time: minutes at 210 F. v
For better results, add nitrite continuously, due to its decomposition.
Sodium nitrite Time: 5 minutes at 200 F.
' point of economy, although stronger solutions are just as effective. A treatment of one minute in The. above mentioned manganese acid phosphate" solution is made u by adding to 100 gallons of water gallons of losphorlc acid and 35 lbs. of normal manganese pliosp ate.
The pieces to be treated may be submerged in the above outlined solutions, or the'solutions may be sprayed onto the work. If the article to be coated contains heavy grease the same should first be removed by any of the well-known grease solvents. If no such grease is present a hot water immersion or spray for approximately two minutes has been found very beneficial,
The increase of zinc content in the above soluticns by adding a soluble zinc'salt, such as zinc sulphate or zinc nitrate, improves the coating a great deal.
All of the above mentioned baths dissolve considerable copper from the work being treated which copper is retained in the solution to some extent and apparently has some balancing effect to produce a better coating as the solution becomes aged.
A copper compound, such as copper carbonate or copper sulfate may be added before processing, when desired.
The following accelerating metals may also be used: antimony, nickel and silver.
With any .of the above solutions the work may be immersed therein or if more convenient the solutions may be sprayed onto the work by means of any of the well-known spraying equipments.
It has been further discovered that when the coatings produced in accordance with this invention are subject to a final rinse in a solution of the kind described below, the corrosion resistance is still further enhanced. For this purpose a dilute solution of chromic acid, phosphoric acid, oxalic acid or a salt of iron, chromium or aluminum may be used, such as aluminum nitrate or sulfate, ferrous sulfate, ferric nitrate and chromic sulfate or nitrate. A particular advantage derived from the use of one of these final rinses is that subsequent paint blistering is reduced to a minimum. The solutions may be used from F. to F.-
From '7 to 21 ounces of the acid or salt perlOO gallons is the preferred strength from the standthese solutions is sufficient.
There has been disclosed a new and improved process for coating copper and its alloys whereby a metallic surface is converted to a nonmetallic phosphate coating which in turn may be readily painted. Objects of copper, brass, or the like, have presented a problem for years on account of their tendency to tarnish when exposed to atmospheric conditions for any great length of time and the impossibility to make paint adhere to their surfaces. After the object has been treated as disclosed in the present application, the article being treated may be painted any desirable color, and the paint, enamel, or the like, forms an additional protective coating for the metal.
What I claim is:
l. A process for producing corrosion retarding coatings on articles of copper and its alloys which comprises subjecting th surface thereof to the action of a solution containing an acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides.
2. A process for producing corrosion retarding coatings on articles of copper and its alloys which comprises subjecting the surface thereof to the action of a solution containing an acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides, and thereafter subjecting the articles to a rinse in a solution containing an acid selected from the group consisting of chromic acid, phosphoric acid and oxalic acid.
3. A process for producing corrosion retarding coatings on articles of copper and its alloys, which comprises subjecting the surface thereof to the a c t 1on of a solution containing an acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides, and thereafter subjecting the articles to a rinse in a solution containing a salt selected from the group consisting of iron, chromium and aluminum.
4. An object of copper and its alloys having on the surface thereof an integral coating having the composition resulting from treating the copper metal object with a solution containingan acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium, and an oxidizing agent selected from the 7 duction of corrosion retarding coatings on articles of copper and its alloys comprising an acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium, and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides.
6. An object of copper and its alloys having on the surface thereof an integral coating resulting from treating the object with a solution containing an acid phosphate selected from the group consisting of zinc, manganese, cadmium and magnesium, and an oxidizing agent selected from the group consisting of persulphates, permanganates. iodates, nitrites and peroxides and thereafter rinsed with a solution containing hexavalent chromium.
'7. A process for producing corrosion retarding coatings on articles of copper and its alloys which comprises subjecting the surface thereof to the action of a solution containing zinc dihydrogen phosphate and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides.
8. A process for producing corrosion retarding coatings on articles of copper and its alloys which comprises subjecting the surface thereof to the action of a solution containing zinc dihydrogen phosphate and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides and rinsing the coated surface with a solution containing hexavalent chromium.
9. An object of copper and its alloys having on the surface thereof an integral coating having the composition resulting from treating the object with a solution containing zinc dihydrogen phosphate, and an oxidizing agent selected from the group consisting of persulphates, permanganates, iodates, nitrites and peroxides.
10. An object of copper and its alloys having
US358837A 1938-06-06 1940-09-28 Method of coating copper and its alloys Expired - Lifetime US2272216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US358837A US2272216A (en) 1938-06-06 1940-09-28 Method of coating copper and its alloys

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US212209A US2233422A (en) 1938-06-06 1938-06-06 Method of coating copper and its alloys
US358837A US2272216A (en) 1938-06-06 1940-09-28 Method of coating copper and its alloys

Publications (1)

Publication Number Publication Date
US2272216A true US2272216A (en) 1942-02-10

Family

ID=26906888

Family Applications (1)

Application Number Title Priority Date Filing Date
US358837A Expired - Lifetime US2272216A (en) 1938-06-06 1940-09-28 Method of coating copper and its alloys

Country Status (1)

Country Link
US (1) US2272216A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2846342A (en) * 1955-09-30 1958-08-05 Leo P Curtin Bonding coats for metal
US3161549A (en) * 1955-04-08 1964-12-15 Lubrizol Corp Solution for forming zinc phosphate coatings on metallic surfaces
US3645806A (en) * 1968-08-16 1972-02-29 Ici Ltd Coating solutions derived from peroxy disulfuric acid or peroxy diphosphoric acid
US4182639A (en) * 1978-11-06 1980-01-08 United States Steel Corporation Method for improving the adhesion of brass-coated steel cord to rubber
EP0169047A2 (en) * 1984-07-14 1986-01-22 Nippondenso Co., Ltd. Copper-based metallic member having a chemical conversion film and method for producing same
US5118367A (en) * 1989-09-25 1992-06-02 The Goodyear Tire & Rubber Company Process for treating a brass-plated steel wire
US5229215A (en) * 1989-09-25 1993-07-20 The Goodyear Tire & Rubber Company Brass-plated steel wire
US5550006A (en) * 1993-01-11 1996-08-27 Macdermid, Incorporated Phosphating compositions and processes, particularly for use in fabrication of printed circuits utilizing organic resists

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3161549A (en) * 1955-04-08 1964-12-15 Lubrizol Corp Solution for forming zinc phosphate coatings on metallic surfaces
US2846342A (en) * 1955-09-30 1958-08-05 Leo P Curtin Bonding coats for metal
US3645806A (en) * 1968-08-16 1972-02-29 Ici Ltd Coating solutions derived from peroxy disulfuric acid or peroxy diphosphoric acid
US4182639A (en) * 1978-11-06 1980-01-08 United States Steel Corporation Method for improving the adhesion of brass-coated steel cord to rubber
EP0169047A2 (en) * 1984-07-14 1986-01-22 Nippondenso Co., Ltd. Copper-based metallic member having a chemical conversion film and method for producing same
EP0169047A3 (en) * 1984-07-14 1987-05-13 Nippondenso Co., Ltd. Copper-based metallic member having a chemical conversion film and method for producing same
US4788086A (en) * 1984-07-14 1988-11-29 Nippondenso Co., Ltd. Copper-based metallic member having a chemical conversion film and method for producing same
US5118367A (en) * 1989-09-25 1992-06-02 The Goodyear Tire & Rubber Company Process for treating a brass-plated steel wire
US5229215A (en) * 1989-09-25 1993-07-20 The Goodyear Tire & Rubber Company Brass-plated steel wire
US5550006A (en) * 1993-01-11 1996-08-27 Macdermid, Incorporated Phosphating compositions and processes, particularly for use in fabrication of printed circuits utilizing organic resists

Similar Documents

Publication Publication Date Title
US2312855A (en) Method of coating aluminum
CA1200470A (en) Low zinc content, replenishment
US3515600A (en) Metal treating process and composition
US2106904A (en) Coating malleable non-noble heavy metals
US3053691A (en) Protective coating
US2487137A (en) Producing coatings on metal
US2164042A (en) Art of producing phosphate coatings on surfaces of iron, zinc, or alloys thereof
US2272216A (en) Method of coating copper and its alloys
US2702768A (en) Ferrous surface coating process using alkali metal phosphates and hydroxylamines
GB2155960A (en) Processes and compositions for coating metal surfaces
US2813812A (en) Method for coating iron or zinc with phosphate composition and aqueous solution therefor
US2318642A (en) Coated metal article and method of making same
US3506499A (en) Method of surface-treating zinc,aluminum and their alloys
US1947122A (en) Surface treatment of magnesium and magnesium base alloys
US2244526A (en) Process of treating metal surfaces
US3489625A (en) Process for metal surface conditioning
US3895969A (en) Composition and process for inhibiting corrosion of non-ferrous metal surfaced articles and providing surface for synthetic resin coating compositions
US3755018A (en) Composition and process for inhibiting corrosion of non-ferrous metal surfaced articles and providing receptive surface for synthetic resin coating compositions
US2271375A (en) Process of coating metal surfaces
US2327002A (en) Coated article and method of making the same
US2233422A (en) Method of coating copper and its alloys
US2548419A (en) Method for production of lustrous zinc
US2067215A (en) Method of bonding siccative coats to metal
US2465443A (en) Treatment of magnesium and magnesium alloy articles to increase their resistance to corrosion
US2224245A (en) Protection of magnesium-rich alloys