Do you think cathodic protection is effective? What are the ways that cathodic protection can fail

Corrosion has always been a headache for enterprises. Once the corrosion of enterprise equipment occurs, it will affect the production of enterprises to a large extent. In serious cases, enterprises even need to update equipment. So do you think cathodic protection is effective, and what are the ways of cathodic protection failure? This chapter will give you a detailed analysis of the above issues, to help you to better understand the effect of cathodic protection! If you need to buy sacrificial anode, to learn more about this knowledge, jiaozuo Libo light alloy welcome your call consultation!

Cathodic protection technology is a kind of electrochemical protection technology, by sacrificing the anode to apply an impressed current to the surface of the corroded metal structure, so that the protected structure becomes the cathode to inhibit the occurrence of metal corrosion.

So does cathodic protection work? Jiaozuocity Ladbrokes light alloy that this mainly depends on the anode potential test, if the test pipeline polarization potential or depolarization potential, cathodic protection will play a role. However, when the electrolyte potential of the pipeline applied with cathodic protection is only -0.85V, the protection of the pipeline by cathodic protection will fail.

We divide the failure of cathodic protection into macro failure and micro failure. The macro failures of cathodic protection mainly include: poor electrical continuity or local short circuit fault of CP system, poor environment of pipeline, high IR drop in electrolyte potential of test pipeline, serious overall aging of coating and so on; The micro failures mainly include coating peeling, cathode peeling, environmental shielding and local coating failure.