A comparison of the corrosion behavior of WC-Co-Cr and WC-CoHVOF thermally sprayed coatings by in situ atomic force microscopy (AFM)

被引：63
作者：
Perry, JM [1 ]
Neville, A
Hodgkiess, T
机构：
[1] Univ Glasgow, Dept Mech Engn, Glasgow G12 8QQ, Lanark, Scotland
[2] Heriot Watt Univ, Dept Mech & Chem Engn, Edinburgh EH14 4AS, Midlothian, Scotland
来源：
JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2002年 / 11卷 / 04期
关键词：
atomic force microscopy (AFM); cermet; corrosion; electrochemical;
D O I：
10.1361/105996302770348673
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The corrosion behavior of WC-Co-Cr and WC-Co high velocity oxygen fuel (HVOF) sprayed coatings were examined in static saline conditions. Direct current (DC) polarization tests were conducted and the electrochemical corrosion behavior was shown, by in situ atomic force microscopy (AFM) and scanning electron microscopy (SEM), to be complex because of the composite ceramic-metal nature of the coating. The addition of chromium to the matrix greatly enhanced the corrosion resistance of the coating.
引用
收藏
页码：536 / 541
页数：6
相关论文
共 18 条
[1]   ELECTROCHEMICAL AND LONG-TERM CORROSION STUDIES OF SEVERAL ALLOYS IN BARE CONDITION AND PLASMA SPRAYED WITH CR2O3 [J].
ASHARY, AA ;
TUCKER, RC .
SURFACE & COATINGS TECHNOLOGY, 1990, 43-4 (1-3) :567-576
[2]   ELECTROCHEMICAL CORROSION STUDIES OF ALLOYS PLASMA SPRAYED WITH CR2O3 [J].
ASHARY, AA ;
TUCKER, RC .
SURFACE & COATINGS TECHNOLOGY, 1989, 39 (1-3) :701-709
[3]   COMBINED EROSION AND CORROSION OF THERMAL SPRAYED WC AND CRC COATINGS [J].
BJORDAL, M ;
BARDAL, E ;
ROGNE, T ;
EGGEN, TG .
SURFACE & COATINGS TECHNOLOGY, 1995, 70 (2-3) :215-220
[4]   EROSION AND CORROSION PROPERTIES OF WC COATINGS AND DUPLEX STAINLESS-STEEL IN SAND-CONTAINING SYNTHETIC SEA-WATER [J].
BJORDAL, M ;
BARDAL, E ;
ROGNE, T .
WEAR, 1995, 186 (02) :508-514
[5]  
DUNCAN RJ, 1991, MAT DES, V11, P71
[6]  
Guilemany J. M., 1998, Surface Engineering, V14, P133
[7]   Electrochemical and mechanical interactions during erosion-corrosion of a high-velocity oxy-fuel coating and a stainless steel [J].
Hodgkiess, T ;
Neville, A ;
Shrestha, S .
WEAR, 1999, 233 :623-634
[8]   Electrochemical methods for characterisation of thermal spray corrosion resistant stainless steel coatings [J].
Hofman, R ;
Vreijling, MPW ;
Ferrari, GM ;
de Wit, JHW .
ELECTROCHEMICAL METHODS IN CORROSION RESEARCH VI, PTS 1 AND 2, 1998, 289-2 :641-653
[9]  
Neville A., 1996, Surface Engineering, V12, P303
[10]   Mechanisms of wear on a Co-base alloy in liquid-solid slurries [J].
Neville, A ;
Reyes, M ;
Hodgkiess, T ;
Gledhill, A .
WEAR, 2000, 238 (02) :138-150
12