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高温高压环境下不同浓度KBr溶液对13Cr不锈钢的腐蚀行为影响

朱金阳 郑子易 许立宁 路民旭

朱金阳, 郑子易, 许立宁, 路民旭. 高温高压环境下不同浓度KBr溶液对13Cr不锈钢的腐蚀行为影响[J]. 工程科学学报, 2019, 41(5): 625-632. doi: 10.13374/j.issn2095-9389.2019.05.009
引用本文: 朱金阳, 郑子易, 许立宁, 路民旭. 高温高压环境下不同浓度KBr溶液对13Cr不锈钢的腐蚀行为影响[J]. 工程科学学报, 2019, 41(5): 625-632. doi: 10.13374/j.issn2095-9389.2019.05.009
ZHU Jin-yang, ZHENG Zi-yi, XU Li-ning, LU Min-xu. Influence of KBr concentration on corrosion behaviors of 13Cr stainless steels under high temperature and high pressure[J]. Chinese Journal of Engineering, 2019, 41(5): 625-632. doi: 10.13374/j.issn2095-9389.2019.05.009
Citation: ZHU Jin-yang, ZHENG Zi-yi, XU Li-ning, LU Min-xu. Influence of KBr concentration on corrosion behaviors of 13Cr stainless steels under high temperature and high pressure[J]. Chinese Journal of Engineering, 2019, 41(5): 625-632. doi: 10.13374/j.issn2095-9389.2019.05.009

高温高压环境下不同浓度KBr溶液对13Cr不锈钢的腐蚀行为影响

doi: 10.13374/j.issn2095-9389.2019.05.009
基金项目: 

国家自然科学基金资助项目(51871025)

详细信息
  • 中图分类号: TG174.2

Influence of KBr concentration on corrosion behaviors of 13Cr stainless steels under high temperature and high pressure

  • 摘要: 油气工业中溴盐完井液的使用极易导致油套管腐蚀失效的发生,尤其是局部腐蚀风险.针对这一问题,采用高温高压腐蚀模拟试验、扫描电镜观察与分析、电化学测试等试验研究方法,研究了高温高压环境下不同浓度溴盐溶液对普通13Cr和超级13Cr两种典型油套管材腐蚀行为的影响.结果表明:从平均腐蚀速率来看,两种13Cr管材在三种浓度溴盐溶液中均表现出较好的耐蚀性能,属于轻度或中度腐蚀,但从局部腐蚀速率来看,两种材料均达到严重或极严重腐蚀;随着溴盐浓度的提高,普通13Cr的自腐蚀电位和点蚀电位均明显负移,对应材料的平均腐蚀速率和局部腐蚀速率均明显上升,而超级13Cr仅点蚀电位明显负移,自腐蚀电位则相对稳定,对应其平均腐蚀速率变化幅度较小,局部腐蚀速率则明显上升,这说明相比普通13Cr,超级13Cr对溴盐溶液具有更强的整体耐受能力,但局部腐蚀敏感性仍然较高;激光共聚焦(LSCM)三维表征结果表明,在高质量浓度溴盐溶液(1.40 g·cm-3)中,不论是普通13Cr还是超级13Cr都有明显的点蚀倾向,这主要与溶液中高浓度的侵蚀性阴离子Br-有关,相比于普通13Cr,超级13Cr的点蚀敏感性相对较低,但其点蚀风险仍不可忽视.
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出版历程
  • 收稿日期:  2018-12-24

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