阴极保护条件下X80钢在新疆农田土壤和模拟溶液中的氢脆敏感性差异研究
Difference of Hydrogen Embrittlement Susceptibility of X80 Steel with Cathodic Protection in Xinjiang Farmland Soil and Its Simulation Solution
摘 要
选择西部管道用大管径X80钢,通过外加阴极保护电位下的慢应变拉伸试验结合阴极极化曲线对比分析了其在新疆农田水饱和土壤及其模拟溶液中氢脆敏感性的变化规律.结果表明,随阴极保护电位的负移,X80钢的断面收缩率和延伸率逐渐降低,氢脆敏感性增加;农田土壤和模拟溶液中阴极保护电位分别达到-1.15 V(CSE,下同)和-1.10 V时,X80钢发生明显脆断;X80钢在模拟溶液中的氢脆敏感性高于在土壤中.因此利用土壤模拟溶液对X80钢进行氢脆敏感性研究更偏保守,是适宜的.
X80管线钢
可扩散氢
氢脆
cathodic polarization
X80 pipeline steel
diffusible hydrogen
hydrogen embrittlement
Abstract
The hydrogen embrittlement sensitivity of large diameter X80 pipeline steel in farmland water-saturated soil and its simulation solution was studied by slow strain rate testing and cathodic polarization curves.The results showed that,with negative shifting of cathodic protection potential,the area reduction and elongation of X80 steel decreased,hydrogen embrittlement sensitivity increased.Cathodic protection potential in the soil and simulation solution respectively reached -1.15 V (CSE) and -1.10 V (CSE),X80 steel exhibited obvious brittle fracture.The hydrogen embrittlement sensitivity of X80 steel in simulated soil solution was more sensitive than that in the soil,indicating that the use of soil simulation solution in X80 steel embrittlement sensitivity study is conservative and suitable.
中图分类号 TG172.6 DOI 10.11973/fsyfh-201506010
所属栏目 试验研究
基金项目
收稿日期 2015/2/3
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备注孙冰冰(1988-),助理工程师,学士,从事阴极保护相关研究.
引用该论文: SUN Bing-bing. Difference of Hydrogen Embrittlement Susceptibility of X80 Steel with Cathodic Protection in Xinjiang Farmland Soil and Its Simulation Solution[J]. Corrosion & Protection, 2015, 36(6): 551
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参考文献
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【2】COUDREUSE L,RENAUDIN C,BOCQUET P,et al.Evaluation of hydrogen assisted cracking resistance of high strength jack-up steel[J].Marine Structures,1997,10:85-106.
【3】ONI A.Effects of cathodic overprotection on some mechanical properties of a dual-phaselow-alloy steel in sea water[J].Construction and Building Materials,1996,10(6):481-484.
【4】WANG J,XU L N,ZHANG L,et al.Effect of temperature to crevice corrosion of austenitic and duplex stainless steel in deepwater[C]//The 67th NACE Annual Conference,Houston:NACE,2012.
【5】郏义征,李辉,胡楠楠,等.外加阴极电位对X100管线钢近中性pH应力腐蚀开裂行为的影响[J].四川大学学报:工程科学版,2013,45(4):186-191.
【6】王炳英,霍立兴,王东坡,等.X80管线钢在近中性pH溶液中的应力腐蚀开裂[J].天津大学学报,2007,40(6):757-760.
【7】PING L,XIAO G L,CUI W D,et al.Stress corrosion cracking of X80 pipeline steel in simulated alkaline soil solution[J].Materials and Design,2009,30:1712-1717.
【8】刘智勇,王长朋,杜翠薇,等.外加电位对X80管线钢在鹰潭土壤模拟溶液中应力腐蚀行为的影响[J].金属学报,2011,47(11):1434-1439.
【9】谭志文,杜元龙,傅超,等.阴极保护导致ZC-120钢在海水环境中氢脆[J].材料保护,1988,21(3):10-13.
【10】KIM J S,JANG K S,JIM I J.Electrochemical study of hydrogen embrittlement and optimum cathodic protection potential of welded high strength steel[J].Met Mater Int,2005,11:63-69.
【11】王洪仁,曾庆福.阴极保护电位对921钢海水中应力腐蚀性能影响研究[C]//2004年腐蚀电化学及测试方法学术交流会,武汉:[s.n],2004:164-169.
【12】褚武扬,乔立杰,李金许,等.氢脆和应力腐蚀[M].北京:化学工业出版社,2013.
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