滨海电厂冷却水系统钢管的腐蚀机理与防护

The corrosion mechanism and protection of CS pipes of cooling water system in coastal power plant

滨海电厂冷却水系统钢管在流动的海水环境中,主要受冲击腐蚀、电偶腐蚀和缝隙腐蚀的作用,海水的流速、紊流程度及含沙量对钢管的腐蚀有着重要的影响。针对冷却水系统钢管腐蚀的主要因素,合理布置管线,采用内衬胶或阴极保护等防护措施,能够有效防止钢管的腐蚀,保证电厂的安全运行,降低事故隐患和运行费用。

The CS pipes of cooling water system of coastal power plant are installed in flowing sea water and mainly suffer the impingement corrosion,the galvanic corrosion and the crevice corrosion.The corrosion of CS pipes is affected by the velocity of flow,the degree of turbulence and the sediment concentration of the sea water.Aiming at the major factors of the pipe corrosion,some protection measures,such as the rational arrangement of the pipeline,the inside rubber coat and cathode protection,would effectively prevent corrosion of the pipes,ensure the safety operation of the power plant,eliminate the accident potential and reduce the operation cost.