Effect of 3.5 % NaCl solution with different Na2S concentrations on ultrasonic cavitation erosion behaviors of HVOF sprayed WC-Ni coatings

被引：8

作者：

Wei, Ziyu ^{[1
]}

Shi, Xinlu ^{[1
]}

Cui, Dandong ^{[1
]}

Wei, Zheng ^{[1
]}

Hong, Sheng ^{[1
]}

机构：

[1] Hohai Univ, Coll Mat Sci & Engn, 8 Focheng West Rd, Nanjing 211100, Peoples R China

来源：

ULTRASONICS SONOCHEMISTRY | 2023年 / 101卷

基金：

中国国家自然科学基金;

关键词：

Cavitation erosion; HVOF; WC-Ni; Coating; Sulphide; CORROSION BEHAVIOR; RESISTANCE; COCR; WATER; IONS;

D O I：

10.1016/j.ultsonch.2023.106707

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

In this article, the WC-10Ni coatings were fabricated by HVOF spray, then the ultrasonic cavitation erosion performances of the coatings in distilled water and 3.5 wt% NaCl solution with various Na2S concentrations (0, 20 and 200 ppm) were investigated. The results of the cumulative volume loss of the coating in different mediums showed that the coating exhibited enhanced cavitation erosion resistance with the increase of Na2S concentrations in medium. The reason for the improvement on the cavitation erosion performance was the growth of corrosion product films containing sulphide. In comparison with the coating after cavitation erosion in medium without Na2S, no large craters and deep grooves were observed on the eroded coating surface in medium with Na2S. The ultrasonic cavitation damage of the coating manifests as the spall of the metal binder phase (Ni) and exposure of the hard phase (WC).

引用

页数：11

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