Assessment of the corrosion rates and mechanisms of a WC-Co-CrHVOF coating in static and liquid-solid impingement saline environments

被引：64

作者：

Perry, JM

Neville, A ^{[1
]}

Wilson, VA

Hodgkiess, T

机构：

[1] Heriot Watt Univ, Dept Mech & Chem Engn, Edinburgh EH14 4AS, Midlothian, Scotland

[2] Univ Glasgow, Dept Mech Engn, Glasgow G12 8QQ, Lanark, Scotland

来源：

SURFACE & COATINGS TECHNOLOGY | 2001年 / 137卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

cermet; high velocity oxy-fuel (HVOF); electrochemical; corrosion;

D O I：

10.1016/S0257-8972(00)01062-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The corrosion behaviour of a WC-Co-Cr high-velocity oxy-fuel (HVOF)-sprayed coating has been examined in static saline conditions and under the influence of an impinging jet of liquid free from solids and containing solids. The corrosion behaviour in static conditions is neither passive nor active, and its complexity results from the composite ceramic/metal nature of the coating surface. The influence of exposure to the impinging jet free from solids is to slightly increase the corrosion rate, and a further increase in corrosion rate is observed when solid particles are added to the liquid stream. This paper assesses the corrosion behaviour of this cermet system and discusses the factors controlling the electrochemical material loss. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：43 / 51

页数：9

共 15 条

[1]

[Anonymous], 1992, J THERM SPRAY TECHN, DOI DOI 10.1007/BF02659015

[2] ELECTROCHEMICAL AND LONG-TERM CORROSION STUDIES OF SEVERAL ALLOYS IN BARE CONDITION AND PLASMA SPRAYED WITH CR2O3 [J].