The atmospheric corrosion mechanism of 55%Al-Zn coating on steel

被引：75

作者：

Palma, E

Puente, JM

Morcillo, M

机构：

[1] Ctr Nacl Invest Met, Madrid 28040, Spain

[2] CSI Planos, Aviles 33400, Spain

来源：

CORROSION SCIENCE | 1998年 / 40卷 / 01期

关键词：

55%Al-Zn; galvanized; SEM; weight loss; atmospheric corrosion;

D O I：

10.1016/S0010-938X(97)00112-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper presents the results of a study aimed at understanding the atmospheric corrosion mechanism of the 55%Al-Zn coating (Galvalume) on steel and a comparison with the behaviour of galvanized sheets (Sendzimir). Research has been carried out in different types of atmosphere in Spain, Brazil and Portugal. Unlike the galvanized coating, which suffers a generalized attack of its surface, the 55%Al-Zn coating undergoes a localized type of attack which commences in the interdendritic regions of the material. An analysis is also made of the additional protection which may be provided by a chemical passivating treatment applied on both types of coating. (C) 1997 Elsevier Science Ltd.

引用

页码：61 / 68

页数：8