3Cr钢电阻焊小油管的性能
Performance of ERW Small Tubing of 3Cr Steel
摘 要
通过理化性能检测、电化学测试、高温高压CO2腐蚀试验和氢致开裂试验对3Cr钢电阻焊（ERW）小油管的理化性能、电化学性能、耐高温高压CO2腐蚀性能、耐H2S腐蚀性能等进行了研究。结果表明：其理化性能完全满足API SPEC 5CT-2018标准要求；3Cr钢的自腐蚀电位、阻抗均也高于N80钢的；在高温高压CO2腐蚀环境中，3Cr钢的腐蚀速率为0.93 mm/a，N80钢的腐蚀速率为1.29 mm/a；3Cr钢ERW小油管母材对氢致开裂不敏感，而焊缝对氢致开裂敏感，焊缝处硬度超标是其对氢致开裂敏感的主要原因。
CO2腐蚀
H2S腐蚀
氢致开裂
电阻焊(ERW)油管
3Cr steel
CO2 corrosion
H2S corrosion
hydrogen-induced cracking
electrical resistance weld (ERW) tubing
Abstract
The physicochemical properties, electrochemical properties, high-temperature and high-pressure CO2 corrosion resistance and H2S corrosion resistance for electrical resistance weld (ERW) small tubing of 3Cr steel were studied by physical and chemical property tests, electrochemical tests, high-temperature and high-pressure CO2 corrosion test and hydrogen-induced cracking test. The results show that the physicochemical properties fully met the requirements of API SPEC 5CT-2018. The free corrosion potential and impedance value of 3Cr steel were higher than those of N80 steel. In high-temperature and high-pressure CO2 corrosion environment, the corrosion rate was 0.93 mm/a for 3Cr steel and it was 1.29 mm/a for N80 steel. The base material of 3Cr steel ERW small tubing was not sensitive to hydrogen-induced cracking, while the welded seam was sensitive to hydrogen-induced cracking. Excessive hardness of the welded seam was the main reason for its sensitivity to hydrogen-induced cracking.
中图分类号 TG172.8 DOI 10.11973/fsyfh-202108006
所属栏目 试验研究
基金项目 中国石油天然气集团有限公司科学研究与技术开发项目（2019BC-4013）
收稿日期 2019/12/11
修改稿日期
网络出版日期
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引用该论文: REN Yongfeng,LI Hongbin,HE Shilei,SONG Haihui,WANG Tao,TIAN Xiaojiang,SHI Yijun. Performance of ERW Small Tubing of 3Cr Steel[J]. Corrosion & Protection, 2021, 42(8): 34
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参考文献
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【3】贾志军,杜翠薇,刘智勇,等. 3Cr低合金钢在含饱和CO2的NaCl溶液中的腐蚀电化学行为[J]. 材料研究学报,2011,25(1):39-44.
【4】胡丽华,张雷,许立宁,等. 3Cr低合金管线钢及焊接接头的CO2腐蚀行为[J]. 北京科技大学学报,2010,32(3):345-350.
【5】张雷,胡丽华,孙建波,等. 抗CO2腐蚀低Cr管线钢组织和性能研究[J]. 材料工程,2009,37(5):6-10.
【6】曹勇,穆东,韩会全. 焊接油套管的生产工艺及其发展[J]. 钢管,2011,40(6):20-25.
【7】温宏伟,周勇. HFW焊管无缝化及实现[J]. 焊管,2011,34(3):51-53.
【8】FAZZINI P G,CISILINO A P,OTEGUI J L. Experimental validation of the influence of lamination defects in electrical resistance seam welded pipelines[J]. International Journal of Pressure Vessels and Piping,2005,82(12):896-904.
【9】刘云旭. 金属热处理原理[M]. 北京:机械工业出版社,1981:140-141.
【10】陈长风,赵国仙,严密林,等. 含Cr油套管钢CO2腐蚀产物膜特征[J]. 中国腐蚀与防护学报,2002,22(6):335-38.
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