Characterization and corrosion behavior of Ni-Cr coatings by using pulse current electrodeposition

IF 2.3 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Anti-corrosion Methods and Materials Pub Date : 2023-06-29 DOI:10.1108/acmm-04-2023-2788

Yesen Zhu, C. Gu, Jinliang Wang, X. Xi, Zhen-bo Qin

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引用次数: 3

Abstract

Purpose The purpose of this paper is to study the effect of chromium content on the microstructure and corrosion resistance of Ni-Cr coating. Design/methodology/approach Ni-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. Findings Electrodeposited 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/value Ni-Cr alloy coating without penetration crack was prepared in trivalent chromium electrolyte, and the mechanism of its excellent corrosion resistance was proposed.

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脉冲电流电沉积镍铬镀层的表征及腐蚀行为

目的研究铬含量对镍铬涂层组织和耐蚀性的影响。设计/方法/方法用三价铬通过脉冲电流电沉积制备Ni-Cr涂层。在研究电镀工艺参数对镀层成分和形貌影响的基础上，获得了不同铬含量的镍铬合金镀层。用扫描电子显微镜、X射线衍射仪和透射电子显微镜对其微观结构进行了表征。采用动电位极化和电化学阻抗谱技术研究了腐蚀行为。发现电沉积的铬牢固地溶解在镍中，并细化了涂层的晶粒。随着Cr含量的增加，Ni-Cr涂层的耐蚀性增强，这是由于形成了连续的氢氧化镍和致密的氧化铬钝化膜。在三价铬电解液中制备了无穿透裂纹的新颖/有价值的镍铬合金涂层，并提出了其优异耐腐蚀性能的机理。

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来源期刊

Anti-corrosion Methods and Materials 工程技术-冶金工程

CiteScore

2.80

自引率

16.70%

发文量

审稿时长

13.5 months

期刊介绍： Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world. Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties. • New methods, materials and software • New developments in research and industry • Stainless steels • Protection of structural steelwork • Industry update, conference news, dates and events • Environmental issues • Health & safety, including EC regulations • Corrosion monitoring and plant health assessment • The latest equipment and processes • Corrosion cost and corrosion risk management.