Local electrochemical properties of fusion boundary region in SA508-309L/308L overlay welded joint

被引：35

作者：

Lai, Zhaogui ^{[1
]}

Bi, Peng ^{[1
]}

Wen, Lei ^{[1
]}

Xue, Yanpeng ^{[1
]}

Jin, Ying ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China

来源：

CORROSION SCIENCE | 2019年 / 155卷

关键词：

Fusion boundary; Dissimilar weldment; Local electrochemical properties; SKPFM; LOW-ALLOY STEEL; STRESS-CORROSION CRACKING; HEAT-AFFECTED ZONE; DISSIMILAR METAL; STAINLESS-STEEL; INITIATION;

D O I：

10.1016/j.corsci.2019.04.021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The 309 L-SA508 fusion boundary (FB) in a SA508 - 309 L/308 L overlay cladding weldment was characterized by multi-analytical approaches. Local electrochemical properties around the FB region were investigated in 3.5 wt% NaCl solution by utilizing a self-developed microcell setup combining lithography and capillary techniques. The corrosion resistances follow the order: P1 (little austenite + martensite) > P2 (martensite + little coarse ferrite) > P3 (martensite + numerous coarse ferrite) > P4 (coarse ferrite). A better corrosion resistance of P1 is attributed to its higher Cr, Ni content and larger proportion of Sigma 3 boundaries. The controversy between results of scanning Kelvin probe force microscopy and local electrochemical measurements was demonstrated.

引用

页码：75 / 85

页数：11

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