通过管道内表面磨削处理提高纳米结构AISI 304不锈钢的点蚀抗性。

Enhanced Pitting Corrosion Resistance of Nanostructured AISI 304 Stainless Steel via Pipe Inner Surface Grinding Treatment.

作者信息

Han Xiaolei, Wei Ping, Zhao Yiming, Wang Zuohua, Li Changji, Wu Xinqiang, Zhang Hongwang

机构信息

National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China.

State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China.

出版信息

Nanomaterials (Basel). 2023 Jan 12;13(2):318. doi: 10.3390/nano13020318.

DOI:10.3390/nano13020318

PMID:36678073

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9862195/

Abstract

By means of a pipe's inner surface grinding, a single-phase nanostructured austenite was formed on the surface of an AISI 304 stainless steel. The electrochemical corrosion behavior was compared with a coarse-grained counterpart of identical surface roughness. Experimental results show that the nanostructured austenite shows a higher pitting potential and a wider passivation interval than those of its coarse-grained counterpart. The enhanced corrosion resistance was attributed to the fast diffusion of Cr within the nanostructure and, hence, the formation of a thicker passive film to efficiently protect the surface against the ion attack. This work provides insights into a simple processing method to improve the surface strength and pitting resistance of stainless steel.

摘要

通过对管道内表面进行研磨，在AISI 304不锈钢表面形成了单相纳米结构奥氏体。将其电化学腐蚀行为与具有相同表面粗糙度的粗晶对应物进行了比较。实验结果表明，纳米结构奥氏体比其粗晶对应物具有更高的点蚀电位和更宽的钝化区间。耐蚀性增强归因于Cr在纳米结构内的快速扩散，从而形成更厚的钝化膜以有效保护表面免受离子侵蚀。这项工作为一种提高不锈钢表面强度和耐点蚀性的简单加工方法提供了见解。