GB584097A - Improvements in or relating to processes for the protection of magnesium and magnesium base alloys against corrosion - Google Patents

Improvements in or relating to processes for the protection of magnesium and magnesium base alloys against corrosion

Info

Publication number
GB584097A
GB584097A GB2463644A GB2463644A GB584097A GB 584097 A GB584097 A GB 584097A GB 2463644 A GB2463644 A GB 2463644A GB 2463644 A GB2463644 A GB 2463644A GB 584097 A GB584097 A GB 584097A
Authority
GB
United Kingdom
Prior art keywords
weight
magnesium
per cent
water
against corrosion
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
GB2463644A
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.)
Magnesium Elektron Ltd
Original Assignee
Magnesium Elektron Ltd
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 Magnesium Elektron Ltd filed Critical Magnesium Elektron Ltd
Priority to GB2463644A priority Critical patent/GB584097A/en
Publication of GB584097A publication Critical patent/GB584097A/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)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Chemically Coating (AREA)

Abstract

In a process for the protection against corrosion of magnesium and magnesium alloys, the metals are immersed in an aqueous solution containing nitric acid, chromic acid ions and .2 to 5 per cent. (by weight of the weight of water) of one or more chlorides. A bath containing 200 c.cs. nitric acid in one litre of water, 15 per cent. by weight of the total solution of sodium or potassium bichromate and 1 per cent. by weight of the weight of water of potassium chloride is stated to produce good results with a magnesium base alloy containing between 2 and 5 per cent. of aluminium. The amount of bichromate may vary between 2 and 25 per cent. by weight of the weight of total solution and the nitric acid between 70 and 300 c.cs. per litre of water. Specifications 287,450, [Class 82 (ii)], and 558,425 are referred to.
GB2463644A 1944-12-08 1944-12-08 Improvements in or relating to processes for the protection of magnesium and magnesium base alloys against corrosion Expired GB584097A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2463644A GB584097A (en) 1944-12-08 1944-12-08 Improvements in or relating to processes for the protection of magnesium and magnesium base alloys against corrosion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2463644A GB584097A (en) 1944-12-08 1944-12-08 Improvements in or relating to processes for the protection of magnesium and magnesium base alloys against corrosion

Publications (1)

Publication Number Publication Date
GB584097A true GB584097A (en) 1947-01-07

Family

ID=10214843

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2463644A Expired GB584097A (en) 1944-12-08 1944-12-08 Improvements in or relating to processes for the protection of magnesium and magnesium base alloys against corrosion

Country Status (1)

Country Link
GB (1) GB584097A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961358A (en) * 1957-03-08 1960-11-22 Amchem Prod Method of forming a chromate conversion coating on magnesium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961358A (en) * 1957-03-08 1960-11-22 Amchem Prod Method of forming a chromate conversion coating on magnesium

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