Enhanced corrosion and wear resistance of Zn-Ni/Cu-Al2O3 composite coating prepared by cold spray

被引：13

作者：

Liu, Yuwen ^{[1
]}

Tan, Guibin ^{[2
]}

Tang, Jiahao ^{[1
]}

Zhang, Liuyan ^{[1
]}

Shen, Geng Zhe ^{[1
]}

Gu, Zhiwei ^{[1
,3
]}

Jie, Xiaohua ^{[1
]}

机构：

[1] Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Peoples R China

[2] Guangdong Univ Technol, State Key Lab Precis Elect Mfg Technol & Equipmen, Guangzhou 510006, Peoples R China

[3] Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2023年 / 27卷 / 02期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Zn-based coating; Tribological behavior; Corrosion behavior; Electrochemistry; Structure; SMART COATINGS; PROTECTION; ZINC; BEHAVIOR; STEEL; CU;

D O I：

10.1007/s10008-022-05335-3

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In order to improve the cathodic protection and wear resistance of cold spraying Zn-based coatings, Zn-Ni/Cu-Al2O3 composite coating was prepared by co-depositing Zn powders, nickel-coated Cu powders, and Al2O3 powders on the steel substrate using the low-pressure cold spraying method. The structure and composition of Zn-Ni/Cu-Al2O3 coatings were analyzed by scanning electron microscopy, energy dispersive spectrum analysis, and X-ray diffraction, respectively. And their wear and corrosion resistance were tested. The results show that the structure of the Zn-Ni/Cu-Al2O3 composite coating is compact and the nickel powder is evenly distributed in the coating. Compared with the Zn-Al2O3 coating and Zn-Cu-Al2O3 coating, the Zn-Ni/Cu-Al2O3 composite coating has better wear resistance in air and stronger corrosion resistance in the 3.5 wt.% NaCl solutions. The Zn-Ni/Cu-Al2O3 coating has the lowest corrosion rate and maximum impedance after the immersion and scratch tests. Due to the promoting effect of Ni, the Zn-Ni/Cu-Al2O3 coating can quickly form a dense protective layer of corrosion products, which makes the Zn-Ni/Cu-Al2O3 composite coating has better cathodic protection and defect self-repair performance.

引用

页码：439 / 453

页数：15

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