Research on Intergranular Corrosion Behavior of Welded Joints of Nuclear Grade Stainless Steel

Meng Yu Chai; Can Liang; Dong Dong Wang; Quan Duan; Zao Xiao Zhang

doi:10.4028/www.scientific.net/MSF.809-810.390

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HomeMaterials Science ForumMaterials Science Forum Vols. 809-810Research on Intergranular Corrosion Behavior of...

Research on Intergranular Corrosion Behavior of Welded Joints of Nuclear Grade Stainless Steel

Abstract:

The intergranular corrosion (IGC) behaviors of welded joints of 316LN stainless steel with different welding heat input were investigated in this study. The boiling nitric acid method was chosen to provide the IGC environment. The corrosion rates of different specimens were studied and the micro-structures of each zone (base material, heat affected zone and weld zone) were analyzed in detail. The results show that welding heat input affects IGC resistance remarkably and low welding heat input can reduce the IGC tendency. The IGC test can be divided into three stages, i.e. the initial corrosion stage, stable corrosion stage and rapid corrosion stage. The IGC resistance of WZ for 316LN stainless steel is better than that of BM and HAZ due to the beneficial role of delta ferrite.

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2014 China Functional Materials Technology and Industry Forum

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Periodical:

Materials Science Forum (Volumes 809-810)

Pages:

390-394

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.809-810.390

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Online since:

December 2014

Authors:

Meng Yu Chai*, Can Liang, Dong Dong Wang, Quan Duan, Zao Xiao Zhang

Keywords:

316LN, Austenitic Stainless Steel, Intergranular Corrosion, Nuclear Power, Welded Joint

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