GB483551A - Improvements in and relating to the formation of chemical coatings on metals - Google Patents

Improvements in and relating to the formation of chemical coatings on metals

Info

Publication number
GB483551A
GB483551A GB27868/36A GB2786836A GB483551A GB 483551 A GB483551 A GB 483551A GB 27868/36 A GB27868/36 A GB 27868/36A GB 2786836 A GB2786836 A GB 2786836A GB 483551 A GB483551 A GB 483551A
Authority
GB
United Kingdom
Prior art keywords
rinsing
chromic acid
acid
salts
solution
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
Application number
GB27868/36A
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.)
PATENTS CORP
Original Assignee
PATENTS CORP
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
Application filed by PATENTS CORP filed Critical PATENTS CORP
Publication of GB483551A publication Critical patent/GB483551A/en
Expired 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
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment

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)
  • Chemically Coating (AREA)

Abstract

After the treatment of iron, steel, or zinc surfaces with solutions containing chromic acid, chromates, or dichromates, with or without mineral acids or mineral acid salts, to form protective coatings, the surfaces are rinsed with solutions containing chromic acid, oxalic acid, phosphoric acid, chromium salts, iron salts, or aluminium salts, or mixtures of these substances. The rinsing solution is less acidic than the coating solution and the rinsing may be done as soon as a superficial coating has been formed, after the reaction of the coating solution is complete, or after the original coating has been formed, dried, and baked. The rinsing is preferably carried out at a temperature of about 200 DEG F., and it may be followed by a hot or cold water rinse. The rinsing increases the resistance to corrosion and prevents the formation of blisters when siccative coatings such as paint, enamel, or lacquer are subsequently applied. A preferred rinsing solution contains 4 grams of chromic acid per gallon of water: solutions of ferric, chromic, or aluminium nitrate are also specified. A coating solution containing 35 gms. of chromic acid and 65 gms. of sodium chloride in 3 litres of water is described for treating steel panels, the panels being then rinsed in hot water, rinsed in chromic acid solution and baked at 600 DEG F.
GB27868/36A 1935-10-19 1936-10-14 Improvements in and relating to the formation of chemical coatings on metals Expired GB483551A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US483551XA 1935-10-19 1935-10-19

Publications (1)

Publication Number Publication Date
GB483551A true GB483551A (en) 1938-04-14

Family

ID=21954127

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27868/36A Expired GB483551A (en) 1935-10-19 1936-10-14 Improvements in and relating to the formation of chemical coatings on metals

Country Status (1)

Country Link
GB (1) GB483551A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453429A (en) * 1944-11-30 1948-11-09 Sr Daniel A Gorman Surface treatment of metals
US2497905A (en) * 1945-03-03 1950-02-21 Rheem Mfg Co Coating zinc or cadmium to impart corrosion and abrasion resistance
DE1170751B (en) * 1957-02-23 1964-05-21 J N Tuttle Inc Agent for the aftertreatment of phosphated surfaces
DE1186304B (en) * 1955-08-09 1965-01-28 Metallgesellschaft Ag Process for the production of corrosion-resistant coatings on iron surfaces that form a good adhesive base
US3202551A (en) * 1961-09-13 1965-08-24 Hoechst Ag Method for producing adherent coatings on iron and steel parts
US3210220A (en) * 1962-07-30 1965-10-05 Norman E Clegg Process for coating stainless steel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453429A (en) * 1944-11-30 1948-11-09 Sr Daniel A Gorman Surface treatment of metals
US2497905A (en) * 1945-03-03 1950-02-21 Rheem Mfg Co Coating zinc or cadmium to impart corrosion and abrasion resistance
DE1186304B (en) * 1955-08-09 1965-01-28 Metallgesellschaft Ag Process for the production of corrosion-resistant coatings on iron surfaces that form a good adhesive base
DE1170751B (en) * 1957-02-23 1964-05-21 J N Tuttle Inc Agent for the aftertreatment of phosphated surfaces
US3202551A (en) * 1961-09-13 1965-08-24 Hoechst Ag Method for producing adherent coatings on iron and steel parts
US3210220A (en) * 1962-07-30 1965-10-05 Norman E Clegg Process for coating stainless steel

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