Pore defect and corrosion behavior of HVAF-sprayed Co21Fe14Ni8Cr16Mo16C15B10 high entropy metallic glass coatings

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

Corrosion Science Pub Date : 2024-11-14 DOI:10.1016/j.corsci.2024.112564

Yunyun Ge , Jiangbo Cheng , Lin Xue , Baosen Zhang , Sheng Hong , Xiubing Liang , Shaogang Wang , Xiancheng Zhang

引用次数: 0

Abstract

Pore defect is a primary bottleneck limiting corrosion resistance of the coatings. The relationship between porosity and corrosion behaviors of HVAF-sprayed Co₂₁Fe₁₄Ni₈Cr₁₆Mo₁₆C₁₅B₁₀ high entropy metallic glass (HE-MG) coatings was investigated by 3D XRT, XPS, SKPFM and SVET techniques. The potential difference between pores and surrounding regions expedites corrosion tendency. The corrosion current density of the coating and concentration of defects in passivation film increase as a function of porosity, thereby degrading corrosion resistance. The lowest porosity coating displays exceptional anti-corrosion due to compact films enriched with Cr₂O₃ and Mo⁴⁺ oxides. These findings provide valuable insights for designing corrosion-resistance coatings.

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HVAF 喷射 Co21Fe14Ni8Cr16Mo16C15B10 高熵金属玻璃涂层的孔隙缺陷和腐蚀行为

孔隙缺陷是限制涂层耐腐蚀性的主要瓶颈。通过三维 XRT、XPS、SKPFM 和 SVET 技术研究了 HVAF 喷涂 Co21Fe14Ni8Cr16Mo16C15B10 高熵金属玻璃（HE-MG）涂层的孔隙率与腐蚀行为之间的关系。孔隙和周围区域之间的电位差加速了腐蚀趋势。涂层的腐蚀电流密度和钝化膜中的缺陷浓度随着孔隙率的增加而增加，从而降低了耐腐蚀性。孔隙率最低的涂层由于富含 Cr2O3 和 Mo4+ 氧化物的致密薄膜而显示出卓越的抗腐蚀性。这些发现为设计耐腐蚀涂层提供了宝贵的启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.