EP 0573585 B1 19941214 - TWO-STEP CHEMICAL/ELECTROCHEMICAL PROCESS FOR COATING MAGNESIUM.
Title (en)
TWO-STEP CHEMICAL/ELECTROCHEMICAL PROCESS FOR COATING MAGNESIUM.
Title (de)
ZWEISTUFIGES CHEMISCHES BZW ELEKTROCHEMISCHES VERFAHREN ZUR BESCHICHTUNG VON MAGNESIUM.
Title (fr)
PROCEDE CHIMIQUE/ELECTROCHIMIQUE A DEUX ETAPES D'APPLICATION D'UN REVETEMENT SUR DU MAGNESIUM.
Publication
Application
Priority
- CN 92105170 A 19920626
- US 9201495 W 19920225
- US 66150391 A 19910226
Abstract (en)
[origin: WO9214868A1] A two-step process for coating magnesium and its alloys is disclosed. The first step comprises immersing the magnesium in an aqueous solution comprising about 0.2 to 5 molar ammonium fluoride at a temperature of about 40 to 100 DEG C. The second step is an electrochemical treatment in an aqueous electrolytic solution having a pH of at least about 12.5 and which solution comprises about 2 to 12 g/L of a soluble hydroxide, about 2 to 15 g/L of a fluoride-containing composition, and about 5 to 30 g/L of an alkali metal silicate.
IPC 1-7
IPC 8 full level
C23C 22/57 (2006.01); C25D 9/06 (2006.01); C25D 11/30 (2006.01)
CPC (source: EP)
C25D 11/30 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE
DOCDB simple family (publication)
WO 9214868 A1 19920903; AT E115653 T1 19941215; AU 1535392 A 19920915; BR 9205679 A 19940621; CA 2100168 A1 19920827; CA 2100168 C 20040914; CN 1049701 C 20000223; CN 1080671 A 19940112; DE 69200922 D1 19950126; DE 69200922 T2 19950504; DK 0573585 T3 19950306; EP 0573585 A1 19931215; EP 0573585 B1 19941214; ES 2068710 T3 19950416; GR 3015377 T3 19950630; JP 3183512 B2 20010709; JP H06504815 A 19940602; NO 308907 B1 20001113; NO 933024 D0 19930825; NO 933024 L 19931014
DOCDB simple family (application)
US 9201495 W 19920225; AT 92907909 T 19920225; AU 1535392 A 19920225; BR 9205679 A 19920225; CA 2100168 A 19920225; CN 92105170 A 19920626; DE 69200922 T 19920225; DK 92907909 T 19920225; EP 92907909 A 19920225; ES 92907909 T 19920225; GR 940404119 T 19950313; JP 50738392 A 19920225; NO 933024 A 19930825