EP 0480355 A3 19920902 - IRON-ZINC ALLOY PLATED STEEL SHEET HAVING TWO PLATING LAYERS AND EXCELLENT IN ELECTROPAINTABILITY AND PRESS-FORMABILITY
Title (en)
IRON-ZINC ALLOY PLATED STEEL SHEET HAVING TWO PLATING LAYERS AND EXCELLENT IN ELECTROPAINTABILITY AND PRESS-FORMABILITY
Publication
Application
Priority
JP 27017190 A 19901008
Abstract (en)
[origin: EP0480355A2] An iron-zinc alloy plated steel sheet having two plating layers and excellent in electropaintability and press-formability, which comprises; a steel sheet; an alloying-treated iron-zinc alloy dip-plating layer as a lower layer formed on at least one surface of the steel sheet; and an iron-zinc alloy electroplating layer as an upper layer, formed on the iron-zinc alloy dip-plating layer. The iron content in the iron-zinc alloy dip-plating layer is from 7 to 15 wt.%, and the plating weight of the iron-zinc alloy dip-plating layer is from 30 to 120 g/m<2> per surface of the steel sheet. The iron content in the iron-zinc alloy electroplating layer is at least 60 wt.%. The iron-zinc alloy electroplating layer has a plurality of dots of another iron-zinc alloy; the iron content in each of the plurality of dots of another iron-zinc alloy is under 60 wt.%; the total exposed area per unit area of the plurality of dots of another iron-zinc alloy is from 5 to 50% of the unit area of the iron-zinc alloy electroplating layer; the diameter of each of the plurality of dots of another iron-zinc alloy is from 1 to 100 mu m; and the total plating weight of the iron-zinc alloy electroplating layer and the plurality of dots of another iron-zinc alloy is from 1 to 10 g/m<2> per surface of the steel sheet.
IPC 1-7
IPC 8 full level
C25D 3/28 (2006.01); C23C 2/06 (2006.01); C23C 2/28 (2006.01); C23C 28/02 (2006.01); C25D 3/56 (2006.01); C25D 5/26 (2006.01)
CPC (source: EP KR US)
C23C 2/28 (2013.01 - EP KR US); C23C 28/023 (2013.01 - EP); C25D 3/562 (2013.01 - EP); C25D 5/10 (2013.01 - KR)
Citation (search report)
- [A] US 4329402 A 19820511 - HYNER JACOB, et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 14, no. 390 (C-751)(4333) 23 August 1990 & JP-A-2 145 778 ( KOBE STEEL ) 5 June 1990
- [A] PATENT ABSTRACTS OF JAPAN vol. 009, no. 188 7 September 1983 & JP-A-60 056 090 ( KOBE SEIKOSHO ) 1 April 1985
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0480355 A2 19920415; EP 0480355 A3 19920902; EP 0480355 B1 19950208; CA 2052112 A1 19920409; CA 2052112 C 19970909; DE 69107270 D1 19950323; DE 69107270 T2 19950713; JP 2536271 B2 19960918; JP H04147992 A 19920521; KR 920008223 A 19920527
DOCDB simple family (application)
EP 91117059 A 19911007; CA 2052112 A 19910924; DE 69107270 T 19911007; JP 27017190 A 19901008; KR 910017292 A 19911002