Microstructure and pitting corrosion of 13CrNiMo weld metals

被引：55
作者：
Bilmes, P. D.
Llorente, C. L.
Huaman, L. Saire
Gassa, L. M.
Gervasi, C. A.
机构：
[1] Natl Univ La Plata, Fac Ciencias Exactas, Inst Invest Fisicoquim Teor & Aplicadas, RA-1900 La Plata, Argentina
[2] Natl Univ La Plata, Fac Ingn, LIMF, Dept Mecan, RA-1900 La Plata, Argentina
[3] Natl Univ La Plata, Fac Ingn, LICTE, Dept Ingn Quim, RA-1900 La Plata, Argentina
来源：
CORROSION SCIENCE | 2006年 / 48卷 / 10期
关键词：
stainless steel; welding; pitting corrosion; potentiodynamic polarization; retained austenite;
D O I：
10.1016/j.corsci.2005.10.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cyclic potentiodynamic measurements and scanning electron microscopy were used to analyze susceptibility to pitting corrosion of 13CrNiMo weld metals. In order to carry out a critical assessment of the influence of microstructural factors on localized corrosion, different heat treatments were applied to the alloys under investigation. Volume fractions of austenite in tempered conditions as well as the amount and size of precipitated carbides strongly affect pitting resistance. Characteristic potentials (pitting potential and repassivation potential) increase according to the retained austenite content. Results can be discussed in terms of a model that describes the structural refinement resulting from a double-tempering procedure. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3261 / 3270
页数：10
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