GB812665A - Improvements in or relating to the production of corrosion-resistant coatings on magnesium surfaces - Google Patents

Improvements in or relating to the production of corrosion-resistant coatings on magnesium surfaces

Info

Publication number
GB812665A
GB812665A GB27926/57A GB2792657A GB812665A GB 812665 A GB812665 A GB 812665A GB 27926/57 A GB27926/57 A GB 27926/57A GB 2792657 A GB2792657 A GB 2792657A GB 812665 A GB812665 A GB 812665A
Authority
GB
United Kingdom
Prior art keywords
per cent
chloride
magnesium
sodium
present
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
GB27926/57A
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.)
Henkel Corp
Original Assignee
Amchem Products Inc
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 Amchem Products Inc filed Critical Amchem Products Inc
Publication of GB812665A publication Critical patent/GB812665A/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
    • C23C22/05—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
    • C23C22/24—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 hexavalent chromium compounds

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)

Abstract

An aqueous solution for producing a chromate conversion coating on a magnesium or magnesium-base alloy surface has a pH of 0.1-0.7 and contains 15.25 g/l hexavalent chromium (expressed as CrO3), at least 20 g/l chloride ion, and 0.8-1.5 grams of nitrate (expressed as NaNO3) per gram of chloride. The solution is used at a temperature of 60 DEG -100 DEG F., and is replenished so as to maintain a normality of 0.4-1.0 N when titrated against an alkali using Brom cresol green as indicator. Hexavalent chromium may be present in the solution as chromic acid and ammonium, sodium and potassium chromates and dichromates; chloride may be present as hydrochloric acid, sodium chloride and potassium chloride; and nitrate may be present as nitric acid and ammonium, sodium and potassium nitrates. The coatings are rinsed with dilute chromic and/or phosphoric acid if they are to serve as a basis for paint, lacquer, enamel, japan or the like. The two specified magnesium-base alloys contain (i) Al 3 per cent, Mn 0.3 per cent and Zn 1 per cent, and (ii) Al 5.3-6.7 per cent, Mn at least 0.15 per cent, Zn 2.5-3.5 per cent and Cr, Cu, Fe, Ni, Si together at most 0.3 per cent.
GB27926/57A 1957-03-08 1957-09-04 Improvements in or relating to the production of corrosion-resistant coatings on magnesium surfaces Expired GB812665A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US361452XA 1957-03-08 1957-03-08
US812665XA 1957-03-08 1957-03-08
US1131068XA 1957-03-08 1957-03-08
US1183488XA 1957-03-08 1957-03-08
US644722A US2961358A (en) 1957-03-08 1957-03-08 Method of forming a chromate conversion coating on magnesium

Publications (1)

Publication Number Publication Date
GB812665A true GB812665A (en) 1959-04-29

Family

ID=61187880

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27926/57A Expired GB812665A (en) 1957-03-08 1957-09-04 Improvements in or relating to the production of corrosion-resistant coatings on magnesium surfaces

Country Status (6)

Country Link
US (1) US2961358A (en)
BE (1) BE561524A (en)
CH (1) CH361452A (en)
DE (1) DE1131068B (en)
FR (1) FR1183488A (en)
GB (1) GB812665A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1285274B (en) * 1964-09-28 1968-12-12 Collardin Gmbh Gerhard Process for the production of inorganic coatings on magnesium and magnesium alloys
US20150174610A1 (en) * 2013-12-20 2015-06-25 Pratt & Whitney Canada Corp. Method of spray coating a surface having a magnesium base

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1237876B (en) * 1964-09-28 1967-03-30 Collardin Gmbh Gerhard Process for the production of inorganic coatings on magnesium and magnesium alloys
US3411958A (en) * 1965-05-03 1968-11-19 Mc Donnell Douglas Corp Treatment of steel parts
US5022938A (en) * 1989-07-31 1991-06-11 Omi International Corporation Method for preparing corrosion-resistant zinc-cobalt surfaces
EP0487200B1 (en) * 1990-11-14 2000-06-21 Titeflex Corporation Fluoropolymer aluminium laminate

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB510353A (en) * 1937-12-23 1939-07-24 Hubert Sutton Improvements in or relating to the protection of magnesium and magnesium alloys against corrosion
US2393943A (en) * 1943-08-23 1946-01-29 Rheem Res Products Inc Coating
US2428749A (en) * 1944-08-19 1947-10-07 Dow Chemical Co Surface treatment of magnesium alloys
GB584097A (en) * 1944-12-08 1947-01-07 Magnesium Elektron Ltd Improvements in or relating to processes for the protection of magnesium and magnesium base alloys against corrosion
GB643877A (en) * 1947-08-15 1950-09-27 Arthur Abbey Improved surface treatment of magnesium alloys
US2760890A (en) * 1953-10-14 1956-08-28 Chemical Corp Composition for and method of producing corrosion resistant metal coating
US2864730A (en) * 1953-12-17 1958-12-16 Allied Res Products Inc Method for protecting magnesium and magnesium alloys from corrosion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1285274B (en) * 1964-09-28 1968-12-12 Collardin Gmbh Gerhard Process for the production of inorganic coatings on magnesium and magnesium alloys
US20150174610A1 (en) * 2013-12-20 2015-06-25 Pratt & Whitney Canada Corp. Method of spray coating a surface having a magnesium base
US9879337B2 (en) * 2013-12-20 2018-01-30 Pratt & Whitney Canada Corp. Method of spray coating a surface having a magnesium base

Also Published As

Publication number Publication date
DE1131068B (en) 1962-06-07
BE561524A (en) 1957-10-31
US2961358A (en) 1960-11-22
CH361452A (en) 1962-04-15
FR1183488A (en) 1959-07-08

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