Establishing a New Solution Based on Hydrochloric Acid/Sodium Thiosulfate for Detecting and Measuring Degree of Sensitization of Stainless Steels Using Double-Loop Electrochemical Potentiodynamic Reactivation Method

被引：3
作者：
Momeni, M. [1 ]
Ale-Yassin, A. [1 ]
Moayed, M. H. [1 ]
机构：
[1] Ferdowsi Univ Mashhad, Dept Met & Mat Engn, Mashhad 917751111, Iran
来源：
CORROSION | 2012年 / 68卷 / 01期
关键词：
corrosion; electrochemical method; intergranular corrosion; passivity; stainless steel; INTERGRANULAR CORROSION; BEHAVIOR; EPR; SUSCEPTIBILITY; H2SO4; FILMS; KSCN;
D O I：
10.5006/1.3674297
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, a new solution based on hydrochloric acid (HCl) and sodium thiosulfate (Na2S2O3) has been developed for detecting and measuring degree of sensitization (DOS) using the double-loop electrochemical potentiodynamic reactivation (DL-EPR) method. Two types of stainless steels including Type 304 (UNS S30400) and 28Cr-33Ni-39Fe were sensitized at 650 degrees C for 10, 60, and 300 min. The results revealed that the new solution can detect sensitization in stainless steels suitably with higher resolution than previously reported solutions. The optimum acid concentrations were 0.1 M and 0.4 M HCl for Type 304 stainless steel and 28Cr-33Ni-39Fe, respectively. For Type 304 stainless steel, the depassivator concentration was 0.002 M Na2S2O3, while it was 0.001 M for 28Cr-33Ni-39Fe.
引用
收藏
页数：11
相关论文
共 35 条
[1]   Development of EPR test technique for alloy 800 [J].
Ahemadabadi, P ;
Kain, V ;
Singh, PR ;
De, PK .
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2003, 12 (05) :529-536
[2]   Double loop electrochemical potentiokinetic reactivation test optimization in checking of duplex stainless steel intergranular corrosion susceptibility [J].
Amadou, T ;
Braham, C ;
Sidhom, H .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2004, 35A (11) :3499-3513
[3]  
[Anonymous], 1994, G10894 ASTM INT
[4]  
[Anonymous], 1990, A26290 ASTM INT
[5]   The electrochemical reactivation test (ERT) to detect the susceptibility to intergranular corrosion [J].
Bühler, HE ;
Gerlach, L ;
Greven, O ;
Bleck, W .
CORROSION SCIENCE, 2003, 45 (10) :2325-2336
[6]   Influence of EDTA concentration on the structure and properties of SnS films prepared by electro-deposition [J].
Cheng, Shuying ;
He, Yingjie ;
Chen, Guonan ;
Cho, Eun-Chel ;
Conibeer, Gavin .
SURFACE & COATINGS TECHNOLOGY, 2008, 202 (24) :6070-6074
[7]  
Cheng X., 1999, CORROS SCI, V41, P662
[8]  
Cihal V, 2007, CHEM BIOCHEM ENG Q, V21, P47
[9]  
Cíhal V, 2004, KEY ENG MATER, V261-263, P855
[10]  
Cíhal V, 2001, ELECTROCHIM ACTA, V46, P3867
1234