Influence of Cr Content on the Microstructure and Electrochemical Corrosion in Plasma Cladding Ni-Cr Coatings

被引：10
|
作者：
Zhang, Wenya [1 ]
Wang, Canming [1 ]
Song, Qiang [1 ]
Cui, Hongzhi [1 ]
Feng, Xiaoli [1 ]
Zhang, Chunzhi [1 ]
机构：
[1] Shandong Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266590, Shandong, Peoples R China
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2019年 / 50A卷 / 11期
基金：
中国国家自然科学基金;
关键词：
DUPLEX STAINLESS-STEEL; INTERMETALLIC COMPOUNDS; ALLOY; BEHAVIOR; RESISTANCE; PHASE;
D O I：
10.1007/s11661-019-05440-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ni-xCr (x = 20, 30 and 40 wt pct, respectively) alloy corrosion resistant coatings were manufactured on Q235 substrate by plasma cladding. The effects of the Cr content on the phase composition, microstructure, and corrosion resistance of the Ni-xCr coatings were investigated in detail. The results showed that the main phases of the Ni-xCr coatings were gamma-[Ni, Fe] solid solutions with face-centered cubic (FCC) structure. Electrochemical corrosion tests of different polarization voltages showed that the inhomogeneous distribution of composition and the presence of the multiphase structure led to the occurrence of corrosion. The occurrence of the Cr-rich phase increased the sensitivity of the Cr-poor phase and further accelerated the corrosion process. The Ni-xCr coating with intermediate Cr content (Ni-30Cr) had the best corrosion resistance, which depends on the phase composition of the coating. (C) The Minerals, Metals & Materials Society and ASM International 2019
引用
收藏
页码：5410 / 5420
页数：11
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