AbstractCorrosion, erosion, and abrasion damage arefrequently found in equipment used in service in the oil and gas industries. This represents a challenge to materials engineers because of the deterioration of equipment and increased maintenance costs. Much work is being done on the evolution of corrosion of different types of coatings. The aim of the present work is to study the corrosion behaviour of two different coatings sprayed using high velocity oxyfuel technology. A commercial steel was coated with a CDS 1927 (WC–12Co) or TiC/Ni–Ti powder using a Plasma-Technik CDS–100 thermal spray gun. The powder was sprayed on to a cylindrical specimen 25·4 mm in diameter and 25·4 mm high. The corrosion potential v. time and potentiodynamic polarisation were studied inan ASTM standard cell with three electrodes. Air saturated seawater was used as the electrolyte.