海水环境中镁离子对低铬合金钢耐蚀性改善的影响

Influence of Magnesium Ions in the Seawater Environment on the Improvement of the Corrosion Resistance of Low-Chromium-Alloy Steel.

作者信息

Song Sol-Ji, Kim Jung-Gu

机构信息

School of Advanced Materials Science and Engineering, Sungkyunkwan University, 300 Chunchun-Dong, Jangan-Gu, Suwon 440-746, Korea.

出版信息

Materials (Basel). 2018 Jan 20;11(1):162. doi: 10.3390/ma11010162.

DOI:10.3390/ma11010162

PMID:29361710

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5793660/

Abstract

This study examined the synergic effect of alloying the element Cr and the environmental element Mg ions on the corrosion property of a low-alloy steel in seawater at 60 °C, by means of electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR) tests and weight-loss tests. The Mg ions in seawater played an important role in lowering the electron transfer of the rust layer in the Cr-containing steel. The corrosion resistance of the Cr-containing steel is superior to that of blank steel in Mg ions containing seawater. XPS and XRD results indicated that the formation of MgFe₂O₄ and a mixed layer (Cr oxide + FeCr₂O₄ + MgCr₂O₄) improved the corrosion resistance of the low-alloy steel in the seawater.

摘要

本研究通过电化学阻抗谱（EIS）、线性极化电阻（LPR）测试和失重测试，研究了元素Cr与环境元素Mg离子合金化对一种低合金钢在60℃海水中腐蚀性能的协同作用。海水中的Mg离子在降低含Cr钢锈层的电子转移方面发挥了重要作用。在含Mg离子的海水中，含Cr钢的耐蚀性优于空白钢。X射线光电子能谱（XPS）和X射线衍射（XRD）结果表明，MgFe₂O₄和混合层（Cr氧化物+FeCr₂O₄+MgCr₂O₄）的形成提高了低合金钢在海水中的耐蚀性。