文献类型：期刊文献

英文题名：Characterization and corrosion behavior of Ni-Cr coatings by using pulse current electrodeposition

作者：Zhu, Yesen[1,2];Gu, Cheng-Qing[3];Wang, Jinliang[4];Xi, Xiaohui[4];Qin, Zhenbo[5]

机构：[1]PowerChina Huadong Engn Corp Ltd, Hangzhou, Peoples R China;[2]Tianjin Univ, Sch Mat Sci & Engn, Lab Composite & Funct Mat, Tianjin, Peoples R China;[3]State Grid Xinyuan Hydropower Xinanjiang Hydropowe, Hangzhou, Peoples R China;[4]Guangdong Ocean Univ, Sch Mech & Power Engn, Zhanjiang, Peoples R China;[5]Tianjin Univ, Key Lab Adv Ceram & Machining Technol, Minist Educ, Tianjin, Peoples R China

年份：2023

卷号：70

期号：5

起止页码：236

外文期刊名：ANTI-CORROSION METHODS AND MATERIALS

收录：SCI-EXPANDED(收录号：WOS:001016203400001)、、EI(收录号：20232714329799)、Scopus(收录号：2-s2.0-85163577671)、WOS

基金：This work was supported by China Postdoctoral Science Foundation (2022M722955) and the Open Foundation of State Key Laboratory of Structural Analysis for Industrial Equipment (GZ22118).

语种：英文

外文关键词：Corrosion behavior; Electrochemical impedance spectroscopy; Ni-Cr coating; Pulse current electrodeposition

外文摘要：PurposeThe purpose of this paper is to study the effect of chromium content on the microstructure and corrosion resistance of Ni-Cr coating. Design/methodology/approachNi-Cr coating was prepared by pulse current electrodeposition with trivalent chromium. On the basis of studying effect of electroplating parameters on composition and morphology, Ni-Cr alloy coatings with various chromium contents were obtained. The microstructure was characterized by scanning electron microscopy, X-ray diffractometer and transmission electron microscopy. Corrosion behavior was studied by potentiodynamic polarization and electrochemical impedance spectroscopy techniques. FindingsElectrodeposited chromium was solidly dissolved in nickel and refined the grain of the coating. With the increase of Cr content, the corrosion resistance of Ni-Cr coating was enhanced, which is due to the formation of continuous nickel hydroxide and compact chromium oxide passive films. Originality/valueNi-Cr alloy coating without penetration crack was prepared in trivalent chromium electrolyte, and the mechanism of its excellent corrosion resistance was proposed.