EP 0419678 A4 19931201 - HIGHLY CORROSION-RESISTANT, DOUBLE-COATED STEEL SHEET EXCELLENT IN COATABILITY AND PREVENTED FROM BLISTERING IN ELECRODEPOSITION COATING AND PROCESS FOR PRODUCING THE SAME
Title (en)
HIGHLY CORROSION-RESISTANT, DOUBLE-COATED STEEL SHEET EXCELLENT IN COATABILITY AND PREVENTED FROM BLISTERING IN ELECRODEPOSITION COATING AND PROCESS FOR PRODUCING THE SAME
Publication
Application
Priority
- JP 8927189 A 19890407
- JP 19252789 A 19890727
Abstract (en)
[origin: WO9012128A1] A double-coated steel sheet having a zinc-base coating containing at least a zinc alloy coating or a zinc composite coating and having a coating weight of 25 g/m?2 or above, formed on a steel sheet, and an iron-base coating containing at least an iron coating or an iron alloy coating of an iron content of 50 % or above and having a coating weight of 1 to 10 g/m?2, formed on the zinc-base coating, wherein the total hydrogen occlusion of the coating and the steel is limited to 300 ml/m?2 or below (per sheet face). This sheet has such an excellent coatability that it is prevented from both cratering and blistering in electrodeposition coating and is especially suitable as a rust-preventive steel sheet for automobiles. This steel sheet is produced by applying the aforementioned double-coating on a steel sheet and heat-treating the coated sheet at 100 to 400C.
IPC 1-7
IPC 8 full level
C23C 2/28 (2006.01); C23C 28/02 (2006.01); C25D 5/10 (2006.01); C25D 5/50 (2006.01)
CPC (source: EP KR US)
C23C 2/261 (2022.08 - EP US); C23C 2/28 (2013.01 - EP KR US); C23C 2/40 (2013.01 - KR); C23C 28/023 (2013.01 - EP KR US); C25D 3/562 (2013.01 - KR); C25D 3/565 (2013.01 - KR); C25D 5/10 (2013.01 - EP KR US); C25D 5/50 (2013.01 - EP KR); C25D 7/0614 (2013.01 - KR)
Citation (search report)
- [X] EP 0293476 A1 19881207 - NISSHIN STEEL CO LTD [JP]
- [X] EP 0047987 A1 19820324 - NIPPON STEEL CORP [JP]
- See also references of WO 9012128A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9012128 A1 19901018; CA 2030812 A1 19901008; EP 0419678 A1 19910403; EP 0419678 A4 19931201; KR 920700310 A 19920219
DOCDB simple family (application)
JP 9000471 W 19900406; CA 2030812 A 19900406; EP 90905670 A 19900406; KR 900702571 A 19901206