Assessment of electrochemical methods used on corrosion of superduplex stainless steel

被引：47
|
作者：
de Assis, Kioshy S. [1 ]
de Sousa, Flavio V. V. [1 ]
Miranda, Marcelo [1 ]
Margarit-Mattos, Isabel C. P. [1 ]
Vivier, Vincent [2 ]
Mattos, Oscar R. [1 ]
机构：
[1] COPPE Univ Fed Rio de Janeiro UFRJ, Lab Ensaios Nao Destrut Corrosao & Soldagem LNDC, BR-21945970 Rio De Janeiro, Brazil
[2] Univ Paris 06, LISE, UPR 15, CNRS, F-75252 Paris 05, France
来源：
CORROSION SCIENCE | 2012年 / 59卷
关键词：
Stainless steel; Cyclic voltammetry; SEM; Polarization; Intergranular corrosion; INTERGRANULAR CORROSION; LOCALIZED CORROSION; REACTIVATION TEST; MICROSCOPY; BEHAVIOR; SECM; SENSITIZATION; SPECTROSCOPY; RESISTANCE; IMPEDANCE;
D O I：
10.1016/j.corsci.2012.02.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper addresses the electrochemical parameters proposed in ISO 12732 standard that are used to quantify undesirable phases in a superduplex stainless steel. The relationship among these electrochemical parameters (listed as the maximum current and overall charges ratio during the activation and reactivation polarization curves) and the quantity of undesirable phases were evaluated. It was shown that ferrite is always preferentially corroded in that steel. For aged conditions, the undesirable phases were satisfactorily detected by Double Loop Electrochemical Potentiokinetic Reactivation. A new experimental protocol developed made possible the characterization of the attack occurring at each polarization range. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：71 / 80
页数：10
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