Why might using ICCP be potentially harmful?

Using impressed current cathodic protection (ICCP) can be potentially harmful because it may cause coating damage on the protected structures. This occurs because ICCP systems apply a higher electrical current density compared to other cathodic protection methods such as galvanic anodes. If the current is not correctly controlled, it can lead to excessive polarisation, which may result in the breakdown of protective coatings or corrosion products on the surfaces. Such damage can compromise the integrity of the coatings that are initially protecting the structure, leading to accelerated corrosion rather than its prevention.

Understanding the potential risk of coating damage is crucial for effective cathodic protection implementation, as it highlights the necessity for careful monitoring and control of the ICCP parameters to prevent unwanted effects.