Assessment of intergranular corrosion (IGC) in 316(N) stainless steel using electrochemical noise (EN) technique

被引:47
|
作者
Pujar, M. G. [1 ]
Parvathavarthini, N. [1 ]
Dayal, R. K. [1 ]
Thirunavukkarasu, S. [2 ]
机构
[1] Indira Gandhi Ctr Atom Res, Met & Mat Grp, Corros Sci & Technol Div, Kalpakkam 603102, Tamil Nadu, India
[2] Indira Gandhi Ctr Atom Res, Met & Mat Grp, NDED, Kalpakkam 603102, Tamil Nadu, India
关键词
Stainless steel; Electrochemical noise; Intergranular corrosion; LOCALIZED CORROSION; CARBON-STEEL; SHOT-NOISE; ALLOYS; PARAMETERS; IRON; FLUCTUATIONS; RESISTANCE; INITIATION; IMPEDANCE;
D O I
10.1016/j.corsci.2009.04.028
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In the present work, an attempt was made to demonstrate the use of electrochemical noise (EN) technique in assessment of intergranular corrosion (IGC) in 316(N) stainless steel (SS). Degree of sensitization (DOS) in the specimens aged at 923 K for 24, 40, 50 and 100 h was determined using double loop electrochemical potentiodynamic reactivation (DLEPR) technique. Immediately after applying a prior preconditioning treatment, current and potential noise measurements were made. The DOS was determined from standard deviation of current noise (sigma(1)) versus time plot and it was found to bear a good correlation with the values obtained by DLEPR. Shot noise analysis of the EN data confirmed the above results. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1707 / 1713
页数:7
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