Electrochemical corrosion and passivation behaviour of laser-melted CoCrxNiMo30-xNb6+2%B4C high-entropy alloy coatings in acidic and chloride environments

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-10-03 DOI:10.1016/j.corsci.2025.113380

Xiaoli Jin , Wendi Yang , Zhongyu Cui , Cheng Man , Yucheng Ji , Hongzhi Cui

引用次数: 0

Abstract

The effects of Cr and Mo content on the microstructural and corrosion behavior of CoCr_xNiMo_30-xNb₆+ 2 at% B₄C high-entropy alloy coatings are ivestigated. The coating consists of an FCC matrix and secondary phases, with the strengthening effect resulting from the synergistic action of secondary phase strengthening and dispersion hardening. The Cr₂₅Mo₅ coating exhibited the best corrosion resistance in 0.1 M H₂SO₄ and 3.5 % NaCl solutions. Regarding the passivation film structure, the outer layer is rich in Cr and Mo hydroxides, while the inner layer mainly consists of Cr oxides. Increasing the Mo content effectively enhances the stability of the passivation film under high-temperature conditions.

查看原文本刊更多论文

CoCrxNiMo30-xNb6+2%B4C高熵合金涂层在酸性和氯化物环境中的电化学腐蚀和钝化行为

研究了Cr和Mo含量对CoCrxNiMo30-xNb6+ 2 在% B4C高熵合金涂层中的组织和腐蚀行为的影响。该涂层由FCC基体和次级相组成，强化效果是次级相强化和分散硬化共同作用的结果。Cr25Mo5涂层在0.1 M H2SO4和3.5 % NaCl溶液中表现出最好的耐蚀性。在钝化膜结构上，外层富含Cr和Mo氢氧化物，内层主要由Cr氧化物组成。增加Mo含量可有效提高钝化膜在高温条件下的稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.