EP 0097487 A3 19840912 - METHOD OF PRODUCING CORROSION-RESISTANT COATINGS ON FERROUS-BASE ARTICLES
Title (en)
METHOD OF PRODUCING CORROSION-RESISTANT COATINGS ON FERROUS-BASE ARTICLES
Publication
Application
Priority
US 38930582 A 19820617
Abstract (en)
[origin: EP0097487A2] Hot-dip aluminum-zinc coatings having an aluminum content in excess of about 25% aluminum exhibit a tendency for corrosion flaking, that is, selective corrosion along the interface between the aluminum-zinc overlay and the underlying intermetallic layer. The tendency to such corrosion flaking increases with the aluminum content of the coating. Methods for minimizing this tendency by accelerated cooling of the molten coating as it emerges from the coating bath are ineffective for coatings containing greater than 72% aluminum. It has been found that the addition of 0.04 to 0.32% magnesium in hot-dip aluminum-zinc coating baths will substantially enhance the resistance of the coating to corrosion flaking.
IPC 1-7
IPC 8 full level
CPC (source: EP)
C23C 2/12 (2013.01)
Citation (search report)
- [A] US 3480465 A 19691125 - IMABAYASHI MAMORU, et al
- [A] DE 1771125 A1 19711216 - KERNFORSCHUNG GMBH GES FUER
- [A] FR 1393962 A 19650402 - POMPEY ACIERIES
- [A] EP 0037143 A1 19811007 - CENTRE RECH METALLURGIQUE [BE]
- [A] GB 736224 A 19550907 - REYNOLDS METALS CO
- [A] US 3180716 A 19650427 - DOUGLAS SPROWL JOHN
- [A] US 3055771 A 19620925 - SPROWL JOHN D
- [A] US 3058206 A 19621016 - METS EDWIN J
- [A] FR 1589845 A 19700406
- [A] CHEMICAL ABSTRACTS, vol. 92, 1980, page 280, no. 26628k, Columbus, Ohio, US & IN - A - 146 317 (COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH [INDIA]) 28-04-1979
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0097487 A2 19840104; EP 0097487 A3 19840912; AU 1585983 A 19831222; BR 8303201 A 19840131; JP S5920457 A 19840202
DOCDB simple family (application)
EP 83303464 A 19830615; AU 1585983 A 19830616; BR 8303201 A 19830617; JP 10595983 A 19830615