Abstract: Hydrogen permeation behavior and stress corrosion sensitivity of 1 000 MPa grade high strength steel (HSS) weldment in sea water were studied by hydrogen permeation test and slow strain rate test (SSRT). The fracture characteristics were observed by SEM. Electrochemical test and microstructure observation were also applied to research the hydrogen embrittlement (HE) of the weldment. The results showed that heat affected zone (HAZ) compared with the weld material (WM) and the base metal(BM) had the most negative open circuit potential(OCP) and most positive hydrogen evolution potential, which meant hydrogen evolution and corrosion would be easier to take place in the HAZ. The HAZ of high strength steel weldment had a maximum hydrogen diffusion coefficient and strong tendency to absorb hydrogen. The effect of dynamic electrochemical hydrogen charging on the weldment of high strength steel mainly reflected in the reduction of its plasticity. The strength of the high strength steel weldment showed slight differences under various polarization potentials. While with polarization potential negative shifted, the shrinkage and the elongation decreased and the fracture mode gradually changed from ductile to cleavage. The hydrogen embrittlement coefficient of high strength steel weldment reached the threshold of 25% while the cathodic potential was about -930 mV (vs SCE). The fracture locations of the specimen were mostly in the HAZ under different cathodic potentials.
1 Billingham J, Sharp J V, Spurrier J. Review of the performance of high strength steel used offshore[M].London:Health and Safety Executive,2003. 2 Fernandez J. Stress corrosion cracking of high strength stainless st-eels for use as strand in prestressed marine environment concrete construction[J]. Mater Corros,2015,66(11):1269. 3 Gajek A, Wolarek Z, Zakroczymski T. Behaviour of hydrogen in gas nitrided iron studied by electrochenucal permeation and desorption techniques[J]. Corros Sci,2012,58:260. 4 Hardie D, Charles E A, Lopez A H. Hydrogen embrittlement of high strength pipeline steels[J]. Corros Sci,2006,48(12):4378. 5 Liu Q, Atrens A D, Shi Z, et al. Determination of the hydrogen fugacity during electrolytic charging of steel [J]. Corros Sci,2014,87(5):239. 6 Tan Yanyan, Ma Chunwei. Microstructure and mechanical properties of multrpass welded joint for high strength steel[J].Mater Rev:Res,2015,29(4):114(in Chinese). 谭艳艳, 马春伟. 高强钢多道焊接头显微组织及力学性能[J].材料导报:研究篇,2015,29(4):114. 7 Liu Yu, Li Yan, Li Qiang. Effect of cathodic polarization on hydrogen embrittlement susceptibility of X80 pipeline steel in simulated deep sea environment[J]. Acta Metall Sin,2013,49(9):1089(in Chinese). 刘玉,李焰,李强.阴极极化对X80管线钢在模拟深海条件下氢脆敏感性的影响[J].金属学报,2013,49(9):1089. 8 Zhang Timing, Zhao Weimin, Guo Wang, et al. Susceptibility to hydrogen embrittlement of X65 steel under cathodic protection in artificial sea water[J]. J Chin Soc Corros Protection,2014,34(4):315(in Chinese). 张体明, 赵卫民, 郭望, 等. 阴极保护下X65钢在模拟海水中的氢脆敏感性研究[J]. 中国腐蚀与防护学报,2014,34(4):315. 9 Ma Jiankai, Wang Youhong, Yang Yutan, et al. Microstructure and property of Cu-Cr-Zr alloys with high strength and high conductivity[J]. Mater Rev:Res,2015,29(11):96(in Chinese). 马健凯, 王宥宏, 杨雨潭, 等. 高强高导Cu-Cr-Zr合金的微观组织与性能[J]. 材料导报:研究篇,2015,29(11):96. 10 Shi Lin, Zheng Zhijun, Gao Yan. Mechanism and research methods of pitting corrosion of stainless steels[J].Mater Rev:Rev,2015,29(12):79(in Chinese). 石林, 郑志军, 高岩. 不锈钢的点蚀机理及研究方法[J]. 材料导报:综述篇,2015,29(12):79. 11 Zhang Yingrui, Dong Chaofang, Li Xiaogang, et al. Hydrogen induce dcracking behaviors of X70 Pipeline steel and its welds under electrochemical charging[J]. Acta Metall Sin,2006,42(5):521(in Chinese). 张颖瑞, 董超芳, 李晓刚, 等. 电化学充氢条件下X70管线钢及其焊缝的氢致开裂行为[J]. 金属学报,2006,42(5):521. 12 Zhang T M, Zhao W M, Guo W, et al. Hydrogen permeation behavior through HSLA steels and its implications on hydrogen embrittlement susceptibility[J]. Appl Mechan Mater,2013,302:310. 13 Sun Yongwei, Chen Jizhi, Liu Jun. Study on hydrogen embrittlement susceptibility of 1 000MPa grade 0Cr16Ni5Mo steel [J]. Acta Metall Sin,2015,51(11):1315(in Chinese). 孙永伟, 陈继志, 刘军. 1 000 MPa级0Cr16Ni5Mo钢的氢脆敏感性研究[J].金属学报,2015,51(11):1315. 14 ISO 17081. Method of measurement of hydrogen permeation and determination of hydrogen uptake and transport in metals by an electrochemical technique [S]. 2004. 15 崔忠圻,谭耀春.金属学与热处理(第2版) [M].哈尔滨:机械工业出版社,1989:246. 16 Mo Zhihao, Ding Jian, Miu Luhai. Experimental study on hydrogen induced cracking in welded joint of 16MnR (HIC) steel [J].Metal Processing: Hot Working,2008(4):57(in Chinese). 莫志豪, 丁键, 廖禄海. 16MnR(HIC)钢焊接件抗氢致裂纹的试验研究[J]. 金属加工:热加工,2008(4):57. 17 Li Yongfeng. Research on hydrogen permeation characteristic in steels and hydrogen permeation resistance mechanism of plating[D]: Shanghai: East China University of Science and Technology,2012(in Chinese). 李勇峰. 氢在钢中的渗透特性及镀层阻氢渗透机理的研究[D]: 上海: 华东理工大学,2012. 18 Maier H J, Popp W, Kaesche H. Effects of hydrogen on ductile fracture of a spheroidized low alloy steel[J]. Mater Sci Eng A,1995,191(1):17. 19 Tan Wenzhi, Du Yuanlong, Fu Chao. Environmental embrittlement of ZC-120 steel in sea water induced by cathodic protection[J].Mater Protection,1998,21(3):10(in Chinese). 谭文志, 杜元龙, 傅超. 阴极保护导致ZC-120钢在海水中环境氢脆[J].材料保护,1988,21(3):10. 20 高荣杰, 杜敏. 海洋腐蚀与防护技术[M]. 北京: 化学工业出版社,2011:136.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2017, Vol. 31 
