US1520731A - Process of coating ferric articles with a metallic protective - Google Patents

Process of coating ferric articles with a metallic protective Download PDF

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Publication number
US1520731A
US1520731A US567822A US56782222A US1520731A US 1520731 A US1520731 A US 1520731A US 567822 A US567822 A US 567822A US 56782222 A US56782222 A US 56782222A US 1520731 A US1520731 A US 1520731A
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US
United States
Prior art keywords
articles
coating
article
bath
ferric
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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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US567822A
Inventor
George K Thompson
Jr Joseph Eckert
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Hoyt Metal Co Ltd
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Hoyt Metal Co Ltd
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Publication date
Application filed by Hoyt Metal Co Ltd filed Critical Hoyt Metal Co Ltd
Priority to US567822A priority Critical patent/US1520731A/en
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Publication of US1520731A publication Critical patent/US1520731A/en
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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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/10—Lead or alloys based thereon

Definitions

  • This invention relates to improvements in processes of coating ferric articles with a metallic protective whereby said articles are rendered impermeable to rust and corrosion, and has for its object the production of a process whereby a smooth, even coating may be deposited on the treated article, the junction between said ferric article and said protective coating being maintained chemically pure and mechanically intimate.
  • the first step of the process is the thorough cleaning of the article to be coated, preferably by immersing same in a solution of either muriatic or sulphuric acid whereby all rust, dirt and other impurities are removed from the surface of the article and from the pores and cavities therein, said so lution being formed by mixing water and varying percentages of acid. While the solutions mentioned above constitute very etficient pickling means, still we do not limit our to these methods as any means which will thoroughly clean the article to be coated may be employed.
  • said article After the article has been thoroughly cleaned in the manner set forth, said article is passed through a bath containing zinc chloride as a flux whereby the article is prepared for the reception of the protective coating.
  • the article being treated After the article being treated has been passed through the zinc chloride it is immersed in a bath of molten protective coating material of either lead or an alloy, the constituents of which alloy are antimony and lead, the antimony content thereof varying from of 1 per cent to 16 per cent, and
  • the article treated Immediately upon being withdrawn from the molten protective coating material. the article treated is immersed in a bath of molten 'parafiin or stearin, or other waxy substance, to which may be added varying proportions of zinc chloride or tin chloride 1n percentages of zinc or tin chlorides from a trace to 26 percent.
  • This treatment of the artlcle to a bath of paraffin or stearin results in a smooth, even coating of the coating material on the metal.
  • the process of coating ferric articles WlllCh comprises applying a flux to the sur faces of the articles, immersing said articles in a bath containing molten lead as a major ingredient, withdrawing said articles from said bath, and then immersing said articles in a bath of molten waxy material containing a chloride.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Description

Patented Dec. 30, 1924.
UNITED STATES PATENT OFFICE.
GEORGE K. THOMPSON, on SUMMIT, AND, JOSEPH ECKERT, .13., 0F MAURER, NEW JERSEY, assronons To HOYT METAL COMPANY, OF sT. LOUIS, MIssoUnI, A con- PORATION OF MISSOURI.
PROCESS OF COATING FER/RIC ARTICLES WITH A. METALLIC PROTECTIVE.
No Drawing.
To all whom it may concern:
Be it known that we, GEORGE K. THOMP- SON and JOSEPH ECKERT, J r., citizens of the United States of America, residents of Summit, in the county of Union, State of New Jersey, and of Maurer, in the county of Middlesex, State of New Jersey, respectively, have invented certain new and useful Improvements in Processes of Coating Ferric Articles with a Metallic Protective, of which the following is a full, clear, and exact description.
This invention relates to improvements in processes of coating ferric articles with a metallic protective whereby said articles are rendered impermeable to rust and corrosion, and has for its object the production of a process whereby a smooth, even coating may be deposited on the treated article, the junction between said ferric article and said protective coating being maintained chemically pure and mechanically intimate.
The first step of the process is the thorough cleaning of the article to be coated, preferably by immersing same in a solution of either muriatic or sulphuric acid whereby all rust, dirt and other impurities are removed from the surface of the article and from the pores and cavities therein, said so lution being formed by mixing water and varying percentages of acid. While the solutions mentioned above constitute very etficient pickling means, still we do not limit ourselves to these methods as any means which will thoroughly clean the article to be coated may be employed.
After the article has been thoroughly cleaned in the manner set forth, said article is passed through a bath containing zinc chloride as a flux whereby the article is prepared for the reception of the protective coating.
After the article being treated has been passed through the zinc chloride it is immersed in a bath of molten protective coating material of either lead or an alloy, the constituents of which alloy are antimony and lead, the antimony content thereof varying from of 1 per cent to 16 per cent, and
Application filed June 12, 1922. SeriaI No. 567,822.
because the fluxing material has preserved the surface of the article free from oxide, :1 unlon 1s formed between said article and said protective coating which is chemically pure and mechanically intimate.
Immediately upon being withdrawn from the molten protective coating material. the article treated is immersed in a bath of molten 'parafiin or stearin, or other waxy substance, to which may be added varying proportions of zinc chloride or tin chloride 1n percentages of zinc or tin chlorides from a trace to 26 percent. This treatment of the artlcle to a bath of paraffin or stearin results in a smooth, even coating of the coating material on the metal.
The lmmersion of the lead coated ferric article in the bath of waxy material for a time sufficiently long to produce the smooth even coating, appears to result in a tempermg operatlon and the hardened coating materlal firmly adheres to the ferric material.
We claim:
1 The process of coating ferric articles which comprises applying a flux to the surfaces of the articles, immersing said articles in a bath containing molten lead as a ma or ingredient, withdrawing said article from said bath, and then immersing said articles in a bath of molten waxy material.
2 The process of coating ferric articles which comprises applying a fiux to the surfaces of the articles, immersing said articles in a bath containing molten lead as a major in redient, withdrawing said articles fromsaid bath, and then immersing said articles in a bath of molten parafiin.
3 The process of coating ferric articles WlllCh comprises applying a flux to the sur faces of the articles, immersing said articles in a bath containing molten lead as a major ingredient, withdrawing said articles from said bath, and then immersing said articles in a bath of molten waxy material containing a chloride.
In testimony that we claim the foregoing we hereunto aflix our signatures.
GEORGE K. THOMPSON. JOSEPH EOKERT, JR.
US567822A 1922-06-12 1922-06-12 Process of coating ferric articles with a metallic protective Expired - Lifetime US1520731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US567822A US1520731A (en) 1922-06-12 1922-06-12 Process of coating ferric articles with a metallic protective

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US567822A US1520731A (en) 1922-06-12 1922-06-12 Process of coating ferric articles with a metallic protective

Publications (1)

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US1520731A true US1520731A (en) 1924-12-30

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