Anodic dissolution and passivation mechanisms of 07Cr16Ni6 in K3Cit solution and its electrochemical machining for microstructure

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

Corrosion Science Pub Date : 2025-03-19 DOI:10.1016/j.corsci.2025.112877

Jingtao Wang , Jiabao Zhang , Zhaoyang Zhang , Hao Zhu , Kun Xu , Yang Liu , Wei Xue , Tianlong Li

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引用次数: 0

Abstract

The complexation mechanism, passivation-related behaviors and interface structures of 07Cr16Ni6 in K₃Cit solution were clarified. Cit^3– contend against OH⁻ for cationic, leading to the formation of tetra- or hexa-dentate complexes. The anodic dissolution behaviors revealed passive and transpassive behaviors. Passivation film presented a more capacitive, thicker, stable inner film and a weaker, thinner outer film, and the external and internal films were around 3 nm and 24 nm, respectively. Current efficiency increases gently, then rises steeply, finally stabilizes. The lath-type martensite dispersed on machined surface improved substantially as the current density increased. Finally, the anodic dissolution characteristic models and a high quality round hole were fabricated. The experimental results have proved the feasibility to manufacture high-quality metallic bipolar plates through electrochemical machining on 07Cr16Ni6 alloy in K₃Cit solution.

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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.