The effect of Al content on the galvanic corrosion behaviour of coupled Ni/graphite and Ni-Al coatings

被引：46

作者：

Xu, Cunguan ^{[1
,2
]}

Du, Lingzhong ^{[1
]}

Yang, Bin ^{[2
]}

Zhang, Weigang ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China

[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

CORROSION SCIENCE | 2011年 / 53卷 / 06期

关键词：

Metal coatings; Polarization; SEM; XRD; STAINLESS-STEEL; MECHANICAL-PROPERTIES; BOND COATINGS; WEAR BEHAVIOR; PLASMA; MICROSTRUCTURE;

D O I：

10.1016/j.corsci.2011.02.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the corrosion behaviour of 75Ni/25graphite abradable coating and Ni-Al bonding coatings with different Al content were investigated with open circuit potential and polarization tests. The galvanic corrosion of the coupled Ni/graphite and Ni-Al coatings was studied by using a zero-resistance ammeter in 5 wt% NaCl solution. The experimental results showed that the corrosion resistance of the Ni-Al coatings decreased with increasing Al contents. In the galvanic corrosion test, the Ni-Al coatings with high Al contents (80Ni-20Al, 85Ni-15Al, and 90Ni-10Al) were the anodic element of the couples, while, the 95Ni-5Al acted as the cathode element in the couple. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.

引用

页码：2066 / 2074

页数：9

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