Studies on the degree of sensitization of hyper-duplex stainless steel 2707 at 900°C using a modified DL-EPR test

被引：22

作者：

Sun, Li ^{[1
,2
]}

Sun, Yangting ^{[1
]}

Lv, Chenxi ^{[1
]}

Liu, Yuanyuan ^{[1
]}

Dai, Nianwei ^{[1
]}

Jiang, Yiming ^{[1
]}

Li, Jin ^{[1
]}

Macdonald, Digby D. ^{[2
]}

机构：

[1] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China

[2] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA

来源：

CORROSION SCIENCE | 2021年 / 185卷

基金：

中国国家自然科学基金;

关键词：

Corrosion resistance; HDSS; 2707; Degree of sensitization; Precipitates; INTERGRANULAR CORROSION SUSCEPTIBILITY; PHASE-TRANSFORMATION; REACTIVATION TEST; MECHANICAL-PROPERTIES; SELECTIVE CORROSION; PITTING CORROSION; BEHAVIOR; RESISTANCE; MICROSTRUCTURE; PRECIPITATION;

D O I：

10.1016/j.corsci.2021.109432

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of thermal aging of hyper-duplex stainless steel (HDSS) 2707 at 900 degrees C for various aging times up to 26 h on the localized, selective corrosion were investigated by electrochemical methods. The results demonstrate that the optimum test condition is 2 M H2SO4 + 1.25 M HCl + 0 0.001 M KSCN with the scan rate of 1.5 mV.s (-1) at 30 degrees C. The degree of sensitization (DOS) of HDSS 2707 initially increases rapidly, because of particle precipitation (sigma phase/Cr2N), and then decreases as a result of self-healing by back diffusion of Cr and Mo into the depleted areas, peaking at 10h.

引用

页数：12

共 50 条

[1] Akashi M., 1980, CORROSION ENG, V29, P163
[2] Double loop electrochemical potentiokinetic reactivation test optimization in checking of duplex stainless steel intergranular corrosion susceptibility
Amadou, T
Braham, C
Sidhom, H
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2004, 35A (11): : 3499 - 3513
[3] [Anonymous], 2014, A92314 ASTM
[4] Baboian R., 1995, CORROSION TESTS STAN
[5] Phase transformation and mechanical behavior in annealed 2205 duplex stainless steel welds
Badji, Riad
Bouabdallah, Mabrouk
Bacroix, Brigitte
Kahloun, Charlie
Belkessa, Brahim
Maza, Halim
[J]. MATERIALS CHARACTERIZATION, 2008, 59 (04) : 447 - 453
[6] Basseches M, 2010, PSYCHOTHERAPY AS A DEVELOPMENTAL PROCESS, P1
[7] The electrochemical reactivation test (ERT) to detect the susceptibility to intergranular corrosion
Bühler, HE
Gerlach, L
Greven, O
Bleck, W
[J]. CORROSION SCIENCE, 2003, 45 (10) : 2325 - 2336
[8] Evaluation of selective corrosion in UNSS31803 duplex stainless steel with electrochemical impedance spectroscopy
Chaves, R
Costa, I
de Melo, HG
Wolynec, S
[J]. ELECTROCHIMICA ACTA, 2006, 51 (8-9) : 1842 - 1846
[9] Cihal V, 2007, CHEM BIOCHEM ENG Q, V21, P47
[10] Cíhal V, 2004, KEY ENG MATER, V261-263, P855

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