Corrosion behaviour of sites containing (Cr, Fe)2N particles in thermally aged duplex stainless steel studied using capillary techniques, atomic force microscopy and potentiostatic pulse testing method

被引：32

作者：

Erazmus-Vignal, P. ^{[1
]}

Vignal, V. ^{[1
]}

Saedlou, S. ^{[2
]}

Krajcarz, F. ^{[2
]}

机构：

[1] Univ Bourgogne Franche Comte, CNRS, UMR 6303, ICB, F-21078 Dijon, France

[2] APERAM R&D, F-62330 Isbergues, France

来源：

CORROSION SCIENCE | 2015年 / 99卷

关键词：

Stainless steels; Pitting corrosion; WELD HEAT-TREATMENT; TUBE SHEET WELDS; PITTING CORROSION; MICROSTRUCTURE EVOLUTION; ELECTROCHEMICAL-BEHAVIOR; INTERGRANULAR CORROSION; PASSIVE FILM; RESISTANCE; PHASE; PRECIPITATION;

D O I：

10.1016/j.corsci.2015.07.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure and corrosion behaviour of sites containing (Cr, Fe)(2)N in UNS S32202 duplex stainless steel after heat treatment at 900 degrees C were studied in 2 M NaCl using surface observation techniques at the micro- and nanoscale, the electrochemical microcell technique at the microscale and the potentiostatic pulse testing method. No zone depleted in chromium was detected in the matrix around (Cr, Fe)(2)N. Although there is no depleted zone, pitting corrosion was observed at particles. It is shown that particles first dissolve. A crevice is formed and the bare substrate is exposed to the aggressive solution. Large pits propagate. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：194 / 204

页数：11