GB1014094A - Anodic treatment of zinc and zinc-base alloys - Google Patents

Anodic treatment of zinc and zinc-base alloys

Info

Publication number
GB1014094A
GB1014094A GB48764/63A GB4876463A GB1014094A GB 1014094 A GB1014094 A GB 1014094A GB 48764/63 A GB48764/63 A GB 48764/63A GB 4876463 A GB4876463 A GB 4876463A GB 1014094 A GB1014094 A GB 1014094A
Authority
GB
United Kingdom
Prior art keywords
zinc
amps
moles
foot
electrode surface
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
GB48764/63A
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.)
Teck Metals Ltd
Original Assignee
Teck Metals 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 Teck Metals Ltd filed Critical Teck Metals Ltd
Publication of GB1014094A publication Critical patent/GB1014094A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/36—Phosphatising
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/34—Anodisation of metals or alloys not provided for in groups C25D11/04 - C25D11/32

Abstract

An anodizing process for coating Zn and Zn-base alloy surfaces comprises the step of subjecting the surfaces to electrolysis, using alternating current, in an aqueous solution at a pH of 5-11.4 containing 0.3-3 moles/1. of phosphate anions calculated as PO4, a total of 0.1-3 moles/1. of chromate and/or molybdate and/or tungstate and/or vanadate anions calculated as CrO4, MoO4, WO4 and/or VO3, and Na and/or K cations. The solution may be at 25-100 DEG C. and may additionally contain F anion up to 1 mole/1. and also NH4 cation. The A.C. may be at 60 c.p.s. and the current density may be from 100-1000 Amps./ sq. foot of electrode surface until sparking is observed on an electrode surface and thereafter be reduced to 25-250 Amps./sq. foot, continuing electrolysis at constant current until the voltage has risen to a finishing value of 35-113 Volts. Specification 876,127 is referred to.
GB48764/63A 1962-12-18 1963-12-10 Anodic treatment of zinc and zinc-base alloys Expired GB1014094A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA864808 1962-12-18

Publications (1)

Publication Number Publication Date
GB1014094A true GB1014094A (en) 1965-12-22

Family

ID=4141631

Family Applications (1)

Application Number Title Priority Date Filing Date
GB48764/63A Expired GB1014094A (en) 1962-12-18 1963-12-10 Anodic treatment of zinc and zinc-base alloys

Country Status (2)

Country Link
US (1) US3330744A (en)
GB (1) GB1014094A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1116385A (en) * 1964-08-31 1968-06-06 Kansai Paint Co Ltd Anticorrosion treatment of zinc surfaces
US3852172A (en) * 1971-06-09 1974-12-03 Olivetti & Co Spa Zinc oxidation process
US3898139A (en) * 1973-05-11 1975-08-05 Nippon Steel Corp Process for surface treatment of zinc-plated steel plates
US4617095A (en) * 1985-06-24 1986-10-14 Omi International Corporation Electrolytic post treatment of chromium substrates

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB502678A (en) * 1937-06-22 1939-03-22 Robert Walton Buzzard Bath for and method of coating magnesium and its alloys
US2314341A (en) * 1939-02-28 1943-03-23 Robert W Buzzard Method of and bath for coating magnesium
US2723952A (en) * 1952-11-03 1955-11-15 Harry A Evangelides Method of electrolytically coating magnesium and electrolyte therefor
US2778789A (en) * 1954-06-02 1957-01-22 Mcneill William Electrolytic protective coating for magnesium
GB876127A (en) * 1960-04-04 1961-08-30 Cons Mining & Smelting Co Anodic treatment of zinc and zinc-base alloys

Also Published As

Publication number Publication date
US3330744A (en) 1967-07-11

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