石油化工设备技术 ›› 2024, Vol. 45 ›› Issue (3): 31-35.doi: 10.3969/j.issn.1006-8805.2024.03.007

• 腐蚀与防护 • 上一篇    

某气田复合板压力容器腐蚀原因分析

王 健   

  1. 中海石油技术检测有限公司,天津 300450
  • 收稿日期:2024-03-11 接受日期:2024-04-30 出版日期:2024-05-15 发布日期:2024-07-12
  • 作者简介:王健,男,2015年毕业于大连理工大学材料加工工程专业,硕士,主要从事石油化工设备腐蚀与防护相关工作,高级工程师。

Analysis on Corrosion Causes of Composite Plate Pressure Vessels in a Gas FieldRevamp of Compressor & Pump Equipment Transmission Mode Based on Safety Requirements

Wang Jian   

  1. Zhonghai Petroleum Technology Inspection & Testing Co., Ltd., Tianjin, 300450
  • Received:2024-03-11 Accepted:2024-04-30 Online:2024-05-15 Published:2024-07-12

摘要: 为了确定复合板(Q345R+316L)压力容器的腐蚀原因并制定应对措施,对复合板腐蚀部位进行了宏观形貌分析和理化检验,并采用循环极化法和恒电位法对复合板复层不锈钢在氯离子环境下的耐点蚀性能和钝化能力进行验证。结果表明:复合板在氯化物环境下存在明显的点蚀倾向,且无法进行再钝化,不满足当前环境下的服役工况,需要对压力容器采取一定应对措施来控制氯离子腐蚀的发生。

关键词: 压力容器, 复合板, 316L, 点蚀

Abstract: In order to determine the corrosion reasons of the composite plate (Q345R+316L) pressure vessel and formulate countermeasures, macro-morphological analysis and physical and chemical inspectionwere carried out for the corroded parts of the composite plate. The corrosion resistance and passivation ability of the composite plate laminated stainless steel in chloride environment were verified by cyclic polarization method and constant-potential method. The results indicate that the composite plate has obvious tendency to pitting in chloride environment, and cannot be re-passivated. The composite plate cannot meet the service conditions under current environment and it is necessary to take some measures to control the occurrence of chloride ion corrosion in pressure vessels.

Key words: pressure vessel, composite board, 316L, pitting corrosion