Analysis of SCC sensitive areas for X65 pipeline structure in marine environment

2017 International Conference on Material Engineering and Manufacturing

Bai, L.Y.^1 ; Zhou, H.^2 ; Gao, L.^1 ; Yin, Q.^1 ; Jiang, K.B.^1

Field Engineering Institute of PLA University of Science and Technology, Nanjing Jiangsu

210007, China^1

Wuhan Ship Development Design Institute, Wuhan Hubei

430000, China^2

关键词: Combined effect;    Corrosion damage;    Corrosion morphology;    Magnetic field distribution;    Marine environment;    Parent materials;    Pipeline structure;    Preventive measures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/265/1/012034/pdf
DOI  :  10.1088/1757-899X/265/1/012034

来源: IOP

【 摘 要 】

SCC sensitive areas of welded specimens in the marine environment was investigated by means of magnetic field distribution detection, residual stress measurement and corrosion morphology observation. The study found that both HAZ and parent material surfaces of welded specimens could generate high-level stress concentration areas under the action of marine environment, thereby becoming sensitive areas of SCC. The combined effect of residual stress and corrosion damage results in the formation of SCC sensitive areas. Meanwhile, SCC sensibility on HAZ and parent material surfaces are determined by residual stress level and corrosion damage degree on the structure surface, respectively. Appropriate preventive measures should be taken according to the determinant of HAZ and parent material surfaces' SCC sensibility when SCC preventive measures of X65 pipeline structure servicing in the marine environment are designed.