Polyurethane protective coating at atmospheric corrosion

Abstract

Most of the metals exposed at atmospheric condition can be easily corroded. Especially the presence of humidity, salinity and high temperature accelerates this type of corrosion. Such type of environment is common in most part of the Saudi Arabia. The open exposed metal and their structures such as pipelines, storage tanks, pillars of solar energy, and infrastructures corroded shortly in Kingdom. Different organic coatings usually used to protect this metal and metal structures. The protection worked properly at early stage. The coating failed before the expected duration. It has been found that the UV-degradation of coating hugely affect this failure. In this study polyurethane (PU) formulations with dual function as corrosion and UV-degradation protection-based coating developed. Oil fly ash, a local industry biproduct, also used in formulation to improve the corrosion and UV-degradation resistance.