The Effect of PWHT on Electrochemical Behaviour of AISI 316L Weld Metal

被引：0
|
作者：
Kozuh, S. [1 ]
Gojic, M. [1 ]
Rokovic, M. Kraljic [2 ]
机构：
[1] Univ Zagreb, Fac Met, Sisak 44103, Croatia
[2] Univ Zagreb, Fac Chem Engn & Technol, Zagreb 10000, Croatia
来源：
CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY | 2008年 / 22卷 / 04期
关键词：
Austenitic stainless steel; weld metal; microstructure; pitting corrosion; passive film;
D O I：
暂无
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
The subject of investigation was the corrosion behaviour of AISI 316L austenitic stainless steel weld metal as dependent on a protective passive film formed on the steel surface following exposure to w = 3.5 % NaCl. The corrosion properties were examined before PWHT and after it by means of cyclic polarization, electrochemical impedance spectroscopy, and chronoamperometric measurements. Cyclic polarization curves clearly indicated a decrease in the pitting potential following PWHT. Passivity was observed over a broad potential region. Charge transfer resistance associated with the corrosion resistance of the passive film as determined by electrochemical impedance spectroscopy indicated that high temperature PWHT acted by increasing the thickness of the passive film.
引用
收藏
页码：421 / 431
页数：11
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