Understanding of the interaction between crystallographic orientation and service environment on non-oriented silicon steel corrosion

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Pub Date : 2023-03-27 DOI:10.5006/4237

Yanrui Li, Yinghui Wei, Bao-sheng Liu, L. Hou, Shaohua Zhang, W. Liu

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Abstract

The effect of crystallographic orientation and environment factors on the corrosion behavior of 35TWV1900 non-oriented silicon steel at various temperatures (25, 40 and 60 °C) and Cl− concentrations (0.1, 0.6 and 1 mol/L) was investigated by electrochemical tests and immersion experiments. The results have revealed that the (111) plane exhibits a higher corrosion rate compared with (001) and (101) planes. The increased temperature promotes the anodic dissolution of the substrate, accelerating the formation of corrosion products and the transformation of β/γ-FeOOH to α-FeOOH/Fe3O4. In the immersion environment, the corrosion mechanism is a typical oxygen-absorbing corrosion mechanism. During the electrochemical reaction phase, the corrosion rate shows a trend of first increasing and then decreasing with the increase of Cl− concentration, which can be explained by the catalytic dissolution effect and the protective effect of adsorbed Cl− on the surface. Meanwhile, with the injection of Cl−, the content of dissolved oxygen in the solution decreases and the adsorption competition between Cl− and oxygen increases, leading to the reduction of corrosion rate and inhibiting the formation of oxide film. The two stages of corrosion in an immersion environment are described, and the corrosion mechanism is elucidated.

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晶体取向与使用环境对无取向硅钢腐蚀相互作用的认识

通过电化学测试和浸渍实验，研究了35TWV1900无取向硅钢在不同温度（25、40和60°C）和Cl−浓度（0.1、0.6和1mol/L）下的结晶取向和环境因素对其腐蚀行为的影响。结果表明，与（001）和（101）平面相比，（111）平面表现出更高的腐蚀速率。温度的升高促进了基体的阳极溶解，加速了腐蚀产物的形成，并促进了β/γ-FeOOH向α-FeOOH/Fe3O4的转化。在浸没环境中，腐蚀机理是一种典型的吸氧腐蚀机理。在电化学反应阶段，随着Cl−浓度的增加，腐蚀速率呈现先增大后减小的趋势，这可以用催化溶解作用和表面吸附的Cl−的保护作用来解释。同时，随着Cl−的注入，溶液中溶解氧的含量降低，Cl−与氧之间的吸附竞争加剧，导致腐蚀速率降低，抑制氧化膜的形成。描述了浸没环境中腐蚀的两个阶段，并阐明了腐蚀机理。

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来源期刊

Corrosion MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

2.80

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion. 70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities. Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives: • Contribute awareness of corrosion phenomena, • Advance understanding of fundamental process, and/or • Further the knowledge of techniques and practices used to reduce corrosion.