Effects of pH value on characteristics of oxide films on 316L stainless steel in Zn-injected borated and lithiated high temperature water

被引：56
作者：
Liu, Xiahe
Han, En-Hou [1 ]
Wu, Xinqiang
机构：
[1] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
来源：
CORROSION SCIENCE | 2014年 / 78卷
关键词：
Stainless steel; Zinc; Polarization; XPS; High temperature corrosion; Oxidation; REVISED POURBAIX DIAGRAMS; CORROSION BEHAVIOR; ELECTROCHEMICAL PROPERTIES; ALLOY; 690; 304-STAINLESS-STEEL; ZINC; SOLUBILITY; IMPEDANCE; CONSTANT; HYDROGEN;
D O I：
10.1016/j.corsci.2013.09.017
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of pH values from 6.9 to 7.4 on oxide films for 316L stainless steel in borated and lithiated high temperature water at 573.15 K without and with Zn injection were examined by in situ potentiodynamic polarization curves, electrochemical impedance spectra and ex situ X-ray photoelectron spectroscopy (XPS) analysis. The composition of oxide films appears slightly pH dependent: rich in chromites and ferrites at pH = 6.9 and pH = 7.4, respectively. The corrosion rate decreases significantly in the high pH value solution with Zn injection due to the formation of compact oxide films. The solubilities and structural model of oxides are proposed and discussed. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：200 / 207
页数：8
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