Microstructure and Corrosion Resistance of Ni-Cr-Mo-Si/Cr3C2 Coatings Prepared by Laser Cladding

被引：0

作者：

Fu, Yuming ^{[1
]}

Dong, Hao ^{[1
]}

Ma, Shunxin ^{[1
]}

Zhang, Jiahao ^{[1
]}

Zheng, Lijuan ^{[1
]}

Fu, Chen ^{[1
]}

机构：

[1] Yanshan Univ, Sch Mech Engn, Qinhuangdao, Peoples R China

来源：

MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2025年

关键词：

corrosion resistance; laser cladding; microstructure; Ni-Cr-Mo-Si-Cr3C2; wettability;

D O I：

10.1002/maco.202514914

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure, microhardness, and corrosion resistance of laser cladding Ni-WC coating on the surface of AlSi5Cu1Mg alloy were investigated by scanning electron microscopy, X-ray diffraction, microhardness testing, immersion corrosion testing, and electrochemical measurement. The results show that a smooth coating containing NiAl, Ni3Al, M7C3, M23C6 phases (M=Ni, Al, Cr, W, Fe) and WC particles is prepared by laser cladding. Under a laser scanning speed of 120 mm/min, the microhardness of the cladding coating is 9-11 times that of AlSi5Cu1Mg, due to the synergistic effect of excellent metallurgical bond and newly formed carbides. The Ni-WC coating shows higher corrosion potential (-318.09 mV) and lower corrosion current density (12.33 mu A/cm(2)) compared with the matrix. The crack-free, dense cladding coating obviously inhibits the penetration of Cl- and H+, leading to the remarkedly improved corrosion resistance of cladding coating.

引用

页数：12

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