等离子体电解抛光——提高奥氏体不锈钢耐腐蚀性的生态方法。

Plasma Electrolytic Polishing-An Ecological Way for Increased Corrosion Resistance in Austenitic Stainless Steels.

作者信息

Zatkalíková Viera, Podhorský Štefan, Štrbák Milan, Liptáková Tatiana, Markovičová Lenka, Kuchariková Lenka

机构信息

Department of Materials Engineering, Faculty of Mechanical Engineering, University of Žilina, Univerzitná 8215/1, 010 26 Žilina, Slovakia.

Institute of Production Technologies, Faculty of Materials Science and Technology, Slovak University of Technology in Bratislava, Jána Bottu č. 2781/25, 917 24 Trnava, Slovakia.

出版信息

Materials (Basel). 2022 Jun 14;15(12):4223. doi: 10.3390/ma15124223.

DOI:10.3390/ma15124223

PMID:35744281

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9231404/

Abstract

Plasma electrolytic polishing (PEP) is an environment-friendly alternative to the conventional electrochemical polishing (EP), giving optimal surface properties and improved corrosion resistance with minimum energy and time consumption, which leads to both economic and environmental benefits. This paper is focused on the corrosion behavior of PEP treated AISI 316L stainless steel widely used as a biomaterial. Corrosion resistance of plasma electrolytic polished surfaces without/with chemical pretreatment (acid cleaning) is evaluated and compared with original non-treated (as received) surfaces by three independent test methods: electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PP), and exposure immersion test. All corrosion tests are carried out in the 0.9 wt.% NaCl solution at a temperature of 37 ± 0.5 °C to simulate the internal environment of a human body. The quality of tested surfaces is also characterized by optical microscopy and by the surface roughness parameters. The results obtained indicated high corrosion resistance of PEP treated surfaces also without chemical pretreatment, which increases the ecological benefits of PEP technology.

摘要

等离子体电解抛光（PEP）是传统电化学抛光（EP）的一种环保替代方法，它能以最少的能源消耗和时间消耗赋予材料最佳的表面性能并提高耐腐蚀性，从而带来经济和环境效益。本文聚焦于广泛用作生物材料的经等离子体电解抛光处理的AISI 316L不锈钢的腐蚀行为。通过三种独立的测试方法：电化学阻抗谱（EIS）、动电位极化（PP）和浸泡试验，对未经化学预处理（酸洗）/经过化学预处理的等离子体电解抛光表面的耐腐蚀性进行评估，并与原始未处理（到货时）表面进行比较。所有腐蚀试验均在温度为37 ± 0.5 °C的0.9 wt.% NaCl溶液中进行，以模拟人体内部环境。还通过光学显微镜和表面粗糙度参数对测试表面的质量进行表征。所得结果表明，即使未经化学预处理，经等离子体电解抛光处理的表面也具有高耐腐蚀性，这增加了等离子体电解抛光技术的生态效益。