GB1242435A - Method of coating magnesium or magnesium base alloy articles - Google Patents

Method of coating magnesium or magnesium base alloy articles

Info

Publication number
GB1242435A
GB1242435A GB5762868A GB5762868A GB1242435A GB 1242435 A GB1242435 A GB 1242435A GB 5762868 A GB5762868 A GB 5762868A GB 5762868 A GB5762868 A GB 5762868A GB 1242435 A GB1242435 A GB 1242435A
Authority
GB
United Kingdom
Prior art keywords
magnesium
alkali metal
chromate
resin
base alloy
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
GB5762868A
Inventor
Herbert Kenneth Delong
Delbert James Searson
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.)
Dow Chemical Co
Original Assignee
Dow Chemical 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
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Publication of GB1242435A publication Critical patent/GB1242435A/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
    • C23C22/34—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 fluorides or complex fluorides
    • 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
    • C23C22/60—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 alkaline aqueous solutions with pH greater than 8

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)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

1,242,435. Modifying surfaces of magnesium and alloys thereof; anodizing; electro-phoresis. DOW CHEMICAL CO. Dec.4, 1968 [Dec.4, 1967], No.57628/68. Headings C7A, C7B, C7E and C7U. A Mg or Mg base alloy (wt.% 3À0 Al, 0À5 Mn, 0À4 Zn balance Mg.) surface is coated by electro-- phoretically depositing a water soluble organic resin, and is pre-treated by cleaning and brightening and then contacting with an alkali metal hydroxide, an acid fluoride or an alkali metal or ammonium chromate. The cleaning process may be in a solution containing (wt.%) 6 sodium hydroxide and 1 trisodium phosphate. The brightening process may be mechanical or chemical using a 50 vol. % acetic acid 12% by weight sodium nitrate solution or 50 vol.% hydroxyacetic acid, 12% by weight sodium nitrate solution. The Mg may also be anodized, during passiration, using the Mg as the anode and a lead or carbon cathode with A. C. or D.C. The fluoride may be HF, NH 4 HF 2 , KHF 2 or NaHF 2 . The chromate may be Na or K dichromate dihydrate or K or NH 4 dichromate. The alkali metal hydroxide solution may contain an oxidizing agent e.g. Na nitrate, nitrite, chromate or phosphate. The resin may be polycarboxylic acid derivatives of alkyd, acrylic, epoxy or polyester resin paints. The resin coating may be subsequently baked.
GB5762868A 1967-12-04 1968-12-04 Method of coating magnesium or magnesium base alloy articles Expired GB1242435A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US68745467A 1967-12-04 1967-12-04

Publications (1)

Publication Number Publication Date
GB1242435A true GB1242435A (en) 1971-08-11

Family

ID=24760508

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5762868A Expired GB1242435A (en) 1967-12-04 1968-12-04 Method of coating magnesium or magnesium base alloy articles

Country Status (3)

Country Link
DE (1) DE1811327A1 (en)
FR (1) FR1592993A (en)
GB (1) GB1242435A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366941A1 (en) * 1988-09-29 1990-05-09 SEP GESELLSCHAFT FÜR TECHNISCHE STUDIEN ENTWICKLUNG PLANUNG mbH Process for the electrophoretic coating of chromizable metal surfaces

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5413453B1 (en) * 1970-03-06 1979-05-31

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366941A1 (en) * 1988-09-29 1990-05-09 SEP GESELLSCHAFT FÜR TECHNISCHE STUDIEN ENTWICKLUNG PLANUNG mbH Process for the electrophoretic coating of chromizable metal surfaces

Also Published As

Publication number Publication date
FR1592993A (en) 1970-05-19
DE1811327A1 (en) 1969-07-10

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