海洋学研究 ›› 2016, Vol. 34 ›› Issue (3): 19-24.DOI: 10.3969/j.issn.1001-909X.2016.03.004

• 研究论文 • 上一篇    下一篇

X80钢在含有SRB的海水溶液中阴极保护准则适用性

丁清苗1, 范玥铭1, 张迎芳2   

  1. 1.中国民航大学 机场学院,天津 300300;
    2.中国石油集团工程设计有限责任公司 华北分公司,河北 任丘 062552
  • 收稿日期:2015-08-04 修回日期:2015-12-18 出版日期:2016-09-15 发布日期:2022-11-24
  • 作者简介:丁清苗(1984-),女,山东德州市人,博士,讲师,主要从事材料腐蚀与防护方面的研究。E-mail:qmding@cauc.edu.cn
  • 基金资助:
    国家自然科学青年基金项目资助(51206179);中央高校基金项目资助(3122014D027);中国民航大学实验技术创新基金项目资助(01-14-01)

Study on the cathodic protection criteria applicability of X80 steel in seawater solution containing SRB

DING Qing-miao1, FAN Yue-ming1, ZHANG Ying-fang2   

  1. 1. Airport College, Civil Aviation University of China, Tianjin 300300, China;
    2. China Petroleum Engineering Co., Ltd., North China Company, Renqiu 062552, China
  • Received:2015-08-04 Revised:2015-12-18 Online:2016-09-15 Published:2022-11-24

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摘要： 通过表面观察及电化学方法研究X80钢在含有SRB的海水溶液中阴极保护准则的适用性,测试结果表明:腐蚀控制因素为阳极控制,对金属施加阴极极化第5天降低金属腐蚀速度主要通过增大金属表面SRB的附着电阻和电荷转移电阻实现;而施加阴极极化第10天,阴极保护主要通过改变金属表面电荷转移电阻控制腐蚀速度,且阴极极化电位越大控制效果越好。无阴级保护的金属试样腐蚀产物较多且附着力差,施加阴极保护的金属试样腐蚀产物较少且附着力较强。阴极保护的确能对存在SRB的海水溶液环境中X80钢起到阴极极化作用,但极化5 d时传统的阴极保护准则中-850 mVCSE(即-770 mVSCE)电位未达到85%的保护要求,-950 mVCSE(即-870 mVSCE)电位刚刚能满足保护要求;而极化10 d时2种极化电位下保护度都有所下降且都不能满足保护要求,因此还需要进一步实验确定其合适的阴极保护电位。

关键词: SRB, 表面观察, 电化学方法, 阴极保护准则, 保护度

Abstract: The applicability of cathodic protection criteria was studied by surface observation and electrochemical method while the X80 steel was immersed into seawater solution containing SRB. The results revealed:The corrosion was anode control. The corrosion rate was reduced by increasing the SRB adhesion resistance and the charge transfer resistance on the metal surface in the fifth day. While the metal was protected mainly through changing the charge transfer resistance on the metal surface in the tenth day, and the cathodic polarization potential was more negative, the effect was better. The corrosion products were more and poor adhesion on the metal with no-cathodic polarization, and the corrosion products were less and strong adhesion on the metal surface with cathodic protecting. The cathodic polarization could indeed protect the X80 steel in the presence of SRB. In the fifth day, the protection degree was not up to 85% when the metal was polarized to -850 mVCSE, and it just could meet the protection requirement while polarized to -950 mVCSE. And in the tenth day the protection degree was declined, it did not meet the requirement while polarized to -850 mVCSE and -950 mVCSE. So it was needed to continue to determine the appropriate cathodic protection potential in the presence of SRB.

Key words: SRB, surface observation, electrochemical method, cathodic protection criteria, protective degree

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