Effect of Hydrogen Absorbent Material in Conductive Coating ICCP System

Abstract

Although cathodic protection is widely used for corrosion mitigation, it faces limitations, particularly in protecting parts intermittently exposed to water or shielded from anodes. In complex structures like marine vessels or steel frameworks, traditional systems often fail to protect submerged, buried, or elevated areas effectively. Conductive Coating ICCP (Impressed Current Cathodic Protection) systems address these issues by applying an anode directly onto the substrate surface, reducing power demands, minimizing stray current corrosion, and lowering installation costs. However, overprotection in such systems can cause hydrogen gas evolution at the cathode, leading to blistering and filiform corrosion. This research aims to mitigate hydrogen-related damage by identifying a suitable hydrogen absorbent material and compatible catalyst, optimizing their proportions, and incorporating them into the coating. Performance is evaluated through controlled hydrogen absorption tests, with the ultimate goal of enhancing the long-term durability and effectiveness of Conductive Coating ICCP systems.