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US1761186A - Process of treating ferrous metal articles - Google Patents

Process of treating ferrous metal articles Download PDF

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Publication number
US1761186A
US1761186A US28961328A US1761186A US 1761186 A US1761186 A US 1761186A US 28961328 A US28961328 A US 28961328A US 1761186 A US1761186 A US 1761186A
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Prior art keywords
articles
process
solution
rust
metal
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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
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Marlin C Baker
Wilbert A Dingman
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Parker Rust Proof Co
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Parker Rust Proof Co
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    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C22/00Chemical 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
    • C23C22/73Chemical 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 characterised by the process
    • C23C22/74Chemical 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 characterised by the process for obtaining burned-in conversion coatings
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C22/00Chemical 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
    • C23C22/73Chemical 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 characterised by the process

Description

Patented June 3, 1930 UNITED STATES PATENT oFF cr:

MARLIN 0. Julian AND WILBERT A. nmomn,

OF DETROIT, 'IICHIGAN, ASS IGNORE,

.BY MESNE ASSIGNMENTS, TO PARKER RUST PROOF COMPANY, OF DETROIT, MICHI- GAR, A CORPORATION OF MICHIGAN 'IROCESS OF TREATING FERROUS METAL ARTICLES No Drawing.

The present invention relates to the treat- '5 reference to increasing the rust resisting qualities of said articles.

Among the objects of the invention is a process in whichthe ferrous metal articles are provided with a rust proofing chemically adherent coating.

Another object is a process of rust proofing such articles in which the rust proofing coating is provided in a greatly reduced time of treatment.

Other objects will readily occur to those skilled in the art upon reference to the following description.

In the Patent No.- 870,937, issued to Coslett, Nov. 12, 1907, there is described a process in which phosphoric acid is used to treat the surface of ferrous metal artic es in order to provide on such articles a coating of phosphatic materialf, which coating adheres strongly to the sur ace and is apparently chemically united therewith. This phosphatic coating is highly resistant to rust and protects the metal from oxidation.

In the practicing of the Coslett process and of various modifications which have since been made, it has been found necessary to treat the articles in these solutions and to leave them under such treatment for considerable time so that rust proofing by these various processes requires a period of several hours.

It has been found that this period may be reatly shortened by the modlfication herelnafter described and in fact, the time is decreased to approximately one third or less of the time required with t e Coslett process.

It has been found that by heating the suitably cleaned articles to within a rather narrow temperature range and immersing them, while still heated, in a solution prepared according to the Coslett process and retaining them in the solution for only a very short period, after which they are removed and baked at about the same temperature, as or slightly higher than that of the preheating step, that a protective coat will be formed on the arti- Appllcation filed June 30, 1928. Serial No. 289,818.

cles, which coating compares very favorably with thecoatings produced by the more coinplicated and extended processes.

In carrying out the process, the articles are first suitably cleaned byany conventional method, but preferably by pickling, and then thoroughly removing the pickling solution, unless phosphoric acid has been used, in which case thorough removal is not essential. The articles are then heated to a temperature nothigher than about 500 to 550 F., preferably, about 500 F., and while at this temperature, plunged into a bath of dilutedortho-phosphoric acid, allowed to remain a short time, say about a minute or two, and then taken out and transferred to a drying oven where they are then again heated to about 325to 450 F. The strength of acid that seems to give the'best results is about 33 per cent acid by weight to the balance water, though considerable variation from these proportions may be made. Repetition of the steps of treating, dipping and baking may be made if found desirable.

While the particular solution of diluted acid has been described as the preferred process, other phosphatic rust proofing solutions may be used with the preheating step to great advantage. Such phosphate solutions as those containing manganese or zinc or. iron phosphate or a mixture of these are contemplated by the above statement.

It is also contemplated that such a preheating step will be found advantageous in those treatments which provide the metal with a coating of ferroso-ferric oxid, as it seems that the preliminary heating puts the ferrous articles in a more receptive condition for action by such solutions. When, therefore, the expression rustproofing solution is used in the claims, it is intended to cover any of these active rust proofing solutions.

Now having described the invention and the preferred forms of embodiment thereof, it is We claim:

1. The process of treating articles having surfaces of ferrous metal, which comprises heating said articles to a temperature of about 500 to 550 F., immersing the heated articles in a rust-proofing solution, then removing said articles from said solution and baking at a. temperature of about 325 to 450 F.

2. The process of treating articles having surfaces of ferrous metal, which comprises heating said articles to a temperature of about 500 to 550 F., and immersing the heated articles in a phosphatic rust-proofing solution.

3. The process of treating articles having surfaces of ferrous metal, which comprises heating said articles to a temperature of about 500 to 550 F., immersing the heated articles in a phosphatic rustproofing solution, and removing said articles from said solution and baking at a temperature of about 325 to 450 F.

4. The process of treating articles having surfaces of ferrous metal, which comprises heating said articles to a temperature of about 500 to 550 F., and treating the heated articles with a solution of diluted phosphoric acid solution.

MARLIN G. BAKER. WILBERT A. DINGMAN.

US1761186A 1928-06-30 1928-06-30 Process of treating ferrous metal articles Expired - Lifetime US1761186A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501846A (en) * 1945-10-03 1950-03-28 Armco Steel Corp Production of silicon steel sheet stock having the property of high surface resistivity
US2813813A (en) * 1952-12-17 1957-11-19 Parker Rust Proof Co Process for forming protective phosphate coatings on metallic surfaces
US2845376A (en) * 1953-06-09 1958-07-29 Neilson Chemical Company Method of coating metal surfaces with phosphate
US2984592A (en) * 1958-03-19 1961-05-16 Chem Metals Inc Protective coatings for galvanized members
US3397092A (en) * 1964-02-27 1968-08-13 Hooker Chemical Corp Corrosion-resistant coatings
US3520738A (en) * 1966-01-18 1970-07-14 Nippon Kokan Kk Prevention of rusting of steel
US4231812A (en) * 1978-03-14 1980-11-04 Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgie Surface treatment of metal strip
US6333072B1 (en) 1999-12-23 2001-12-25 The United States Of America As Represented By The Department Of Energy Method of producing adherent metal oxide coatings on metallic surfaces
US6569263B2 (en) * 2001-05-29 2003-05-27 The Regents Of The University Of California Corrosion protection
EP2964805A4 (en) * 2013-03-06 2016-10-12 Quaker Chem Corp High temperature conversion coating on steel and iron substrates

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501846A (en) * 1945-10-03 1950-03-28 Armco Steel Corp Production of silicon steel sheet stock having the property of high surface resistivity
US2813813A (en) * 1952-12-17 1957-11-19 Parker Rust Proof Co Process for forming protective phosphate coatings on metallic surfaces
US2845376A (en) * 1953-06-09 1958-07-29 Neilson Chemical Company Method of coating metal surfaces with phosphate
US2984592A (en) * 1958-03-19 1961-05-16 Chem Metals Inc Protective coatings for galvanized members
US3397092A (en) * 1964-02-27 1968-08-13 Hooker Chemical Corp Corrosion-resistant coatings
US3520738A (en) * 1966-01-18 1970-07-14 Nippon Kokan Kk Prevention of rusting of steel
US4231812A (en) * 1978-03-14 1980-11-04 Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgie Surface treatment of metal strip
US6333072B1 (en) 1999-12-23 2001-12-25 The United States Of America As Represented By The Department Of Energy Method of producing adherent metal oxide coatings on metallic surfaces
US6569263B2 (en) * 2001-05-29 2003-05-27 The Regents Of The University Of California Corrosion protection
EP2964805A4 (en) * 2013-03-06 2016-10-12 Quaker Chem Corp High temperature conversion coating on steel and iron substrates
US9926628B2 (en) 2013-03-06 2018-03-27 Quaker Chemical Corporation High temperature conversion coating on steel and iron substrates

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