C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 2/26 (2006.01) C23C 2/06 (2006.01) C23C 2/12 (2006.01)
Patent
CA 2749695
The present invention provides a Zn-Al-Mg-Cr alloy--coated steel material with excellent corrosion resistance. A molten Zn-Al-Mg-Si-Cr alloy-coated steel material which is a steel material having a Zn-Al-Mg-Cr alloy coating layer and which has an interfacial alloy layer formed of coating layer components and Fe at the coating layer-steel material interface, wherein the interfacial alloy layer has a multilayer structure consisting of an Al-Fe-based alloy layer and an Al-Fe-Si--based alloy layer and furthermore, the Al-Fe-Si-based alloy layer contains Cr.
L'invention concerne un matériau d'acier revêtu d'un alliage Zn-Al-Mg-Cr en bain fondu ayant une excellente résistance à la corrosion. Le matériau d'acier revêtu est un matériau d'acier ayant un revêtement en alliage Zn-Al-Mg-Cr, qui a une couche d'alliage interfaciale dans l'interface revêtement/acier. La couche d'alliage interfaciale est constituée d'éléments constituants du revêtement et de Fe, et a une structure à plusieurs couches comportant une couche d'alliage à base de Al-Fe et une couche d'alliage à base de Al-Fe-Si. La couche d'alliage à base de Al-Fe-Si contient du Cr.
Morimoto Yasuhide
Shimoda Nobuyuki
Goudreau Gage Dubuc
Nippon Steel Corporation
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