电化学电位对316L不锈钢在不同浓度硫酸中摩擦腐蚀行为的影响

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2025-09-01 DOI:10.1016/j.wear.2025.206300

Shoufan Cao , Jinyu Li , Zhanpeng Yang , Shanliang Chen

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引用次数: 0

摘要

316L不锈钢部件的摩擦腐蚀退化严重影响化学反应器和食品加工机械的运行可靠性和使用寿命。虽然316L不锈钢在中性和碱性介质中的摩擦腐蚀行为已经得到了广泛的研究，但在酸性环境中的系统研究，特别是电化学电位和溶液酸度的耦合效应，仍然有限。因此，本研究全面研究了316L不锈钢在不同电化学电位、不同pH值的H2SO4溶液中的摩擦腐蚀行为。采用表面形貌和化学分析方法对磨损进行了评估，了解了摩擦腐蚀机理。结果表明，电化学电位不仅对化学磨损有显著影响，而且对机械磨损也有显著影响。此外，化学磨损和机械磨损随被动电位的变化对溶液ph有很强的依赖性。提出了一种考虑被动膜厚度和氧化铁/氢氧化物选择性溶解的摩擦腐蚀机理。成功地解释了电化学电位和溶液ph的综合影响。这些发现为酸性工业环境中使用的不锈钢的材料选择和摩擦腐蚀保护策略提供了重要的见解。

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Effect of electrochemical potential on the tribocorrosion behavior of 316L stainless steel in sulfuric acid at different concentrations

The tribocorrosion degradation of 316L stainless steel components critically impacts the operational reliability and service longevity of chemical reactors and food processing machinery. While the tribocorrosion behavior of 316L stainless steel in neutral and alkaline media has been extensively studied, systematic investigations in acidic environments, particularly addressing the coupled effects of electrochemical potential and solution acidity, remain limited. Thus, this study comprehensively investigated the tribocorrosion behavior of 316L stainless steel in H₂SO₄ solutions under different electrochemical potentials at varying pH levels. Surface topographical and chemical analyses were adopted to evaluate the wear loss and understand the tribocorrosion mechanism. The results showed that not only chemical wear, but also the mechanical wear was markedly affected by the applied electrochemical potential. In addition, the variation of chemical and mechanical wear with passive potential showed strong dependence on the solution pH. A tribocorrosion mechanism that considers passive film thickness and selective dissolution of Fe oxide/hydroxide was proposed, which successfully explained the comprehensive influence of electrochemical potential and solution pH. These findings provide critical insights for material selection and tribocorrosion protection strategies of stainless steels used in acidic industrial environments.

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来源期刊

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.