Slurry erosion-corrosion resistance and microbial corrosion electrochemical characteristics of HVOF sprayed WC-10Co-4Cr coating for offshore hydraulic machinery

被引：66
作者：
Hong, Sheng [1 ,2 ,3 ]
Wu, Yuping [1 ,3 ]
Gao, Wenwen [1 ]
Zhang, Jianfeng [1 ]
Zheng, Yugui [3 ]
Zheng, Yuan [4 ]
机构：
[1] Hohai Univ, Coll Mech & Mat, 8 Focheng West Rd, Nanjing 211100, Jiangsu, Peoples R China
[2] Mat Corros & Protect Key Lab Sichuan Prov, 180 Xueyuan St, Zigong 643000, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 62 Wencui Rd, Shenyang 110016, Liaoning, Peoples R China
[4] Hohai Univ, Natl Engn Res Ctr Water Resources Efficient Utili, 1 Xikang Rd, Nanjing 210098, Jiangsu, Peoples R China
来源：
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2018年 / 74卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
High-velocity oxygen-fuel; Slurry erosion; Microbial influenced corrosion; Sulfate-reducing bacteria; WC-10Co-4Cr; WC-COCR COATINGS; SULFATE-REDUCING BACTERIA; SLIDING WEAR BEHAVIOR; IMPEDANCE SPECTROSCOPY; MECHANICAL-PROPERTIES; WC/CO HARDMETALS; COATED STEELS; CR; MICROSTRUCTURE; TEMPERATURE;
D O I：
10.1016/j.ijrmhm.2018.02.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The slurry erosion-corrosion and microbial corrosion electrochemical behavior of high-velocity oxygen-fuel (HVOF) sprayed WC-10Co-4Cr cermet coatings and the reference stainless steel 1Cr18Ni9Ti were both investigated. The slurry erosion-corrosion test was performed in a rotating disk rig facility with circulating system using distilled water and 3.5 wt% NaCl slurries. The microbial influenced corrosion behavior in the presence of SRB was evaluated by electrochemical measurement. The results showed that WC-10Co-4Cr coating exhibited higher slurry erosion-corrosion resistance compared to the stainless steel 1Cr18Ni9Ti in both distilled water and 3.5 wt% NaCl slurries. The evolution of the slurry erosion mechanism of the coatings with the augment of NaCl concentration was cracks and microchipping in distilled water slurry, and a combination of detachment of binder phase, microchipping and fragments in 3.5 wt% NaCl slurry. Potentiodynamic polarization and electrochemical impendence spectroscopy (EIS) results showed that the WC-10Co-4Cr coating had a comparable microbial influenced corrosion resistance in seawater with SRB as compared to the stainless steel 1Cr18Ni9Ti.
引用
收藏
页码：7 / 13
页数：7
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