Pit initiation on sensitized Type 304 stainless steel under applied stress: Correlation of stress, Cr-depletion, and inclusion dissolution

被引：64

作者：

Tokuda, Shimpei ^{[1
]}

Muto, Izumi ^{[1
]}

Sugawara, Yu ^{[1
]}

Hara, Nobuyoshi ^{[1
]}

机构：

[1] Tohoku Univ, Dept Mat Sci, Aoba Ku, 6-6-02 Aramaki Aza Aoba, Sendai, Miyagi 9808579, Japan

来源：

CORROSION SCIENCE | 2020年 / 167卷

关键词：

Stainless steel; Sensitization; Sulfide inclusion; Pitting corrosion; Applied stress; AUSTENITIC STAINLESS-STEEL; CORROSION CRACKING; MNS INCLUSIONS; MICROELECTROCHEMICAL MEASUREMENTS; INTERGRANULAR CORROSION; SULFIDE INCLUSIONS; MECHANICAL-STRESS; ELECTROCHEMISTRY; MICROSCOPY; MORPHOLOGY;

D O I：

10.1016/j.corsci.2020.108506

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of applied stress on the pitting of sensitized Type 304 stainless steel were investigated in 4 M MgCl2 immersion test. Regardless of whether stress was applied, pitting was initiated at inclusions at sensitized grain boundaries. In the absence of applied stress, the occurrence of pitting decreased when the area exposed to the solution decreased, and not all the inclusions acted as initiation sites. However, pitting was observed independent of the exposed area under applied stress. The dissolution rates of MnS inclusions and sensitized grain boundaries were accelerated by applied stress.

引用

页数：12

共 39 条

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