Enhancement of pitting corrosion resistance of austenitic stainless steel through deposition of amorphous/nanocrystalline oxy-nitrided phases by active screen plasma treatment

被引：0
作者：
Li Y. [1 ,2 ]
He Y. [2 ]
Qiu J. [1 ]
Zhao J. [2 ]
Ye Q. [1 ]
Zhu Y. [1 ]
Mao J. [2 ]
机构：
[1] Department of Materials Science and Engineering, Yantai University, Yantai
[2] State Key Laboratory of Tribology, Tsinghua University, Beijing
来源：
Li, Yang (metalytu@163.com) | 2018年 / Universidade Federal de Sao Carlos卷 / 21期
基金：
中国国家自然科学基金;
关键词：
Austenitic stainless steel; Oxy-nitrided; Pitting corrosion; XPS;
D O I：
10.1590/1980-5373-mr-2017-0697
中图分类号：
学科分类号：
摘要：
In this research, AISI 304 austenitic stainless steels were efficient treatment using active screen plasma oxy-nitriding technique. The modified layers were characterized by X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopes, and atomic force microscopy. In addition, the pitting corrosion resistances of untreated and oxy-nitrided samples were analyzed by polarization method in 3.5 wt.% NaCl solution. The results showed that a duplex-layer consisting of a deposition layer and a diffusion layer (including CrN+α phase and nitrogen expanded austenite phase) was generated. Special concern has been given to the formation of an amorphous top layer for the deposition of nano sized oxy-nitrides. It believed that the deposition layer of oxy-nitrides formed on steel surface during active screen plasma oxy-nitriding that lead to improved corrosion resistance of AISI 304 austenitic stainless steel, so that the pitting corrosive attack can be avoided. © 2018 Universidade Federal de Sao Carlos. All rights reserved.
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