Hydrophobic Surface of HVOF Sprayed Tungsten Carbide Based Coating
摘要
Tungsten carbide coating deposited by High Velocity Oxy-Fuel (HVOF) spray process possesses high microhardness and dense coating structure. It has very good wear and corrosion resistant properties which are used on components in various industries such as aerospace, marine, offshore, oil and gas. Beside these known properties, there is one interesting surface property—the coating surface has potential to reach near superhydrophobic state which enable a durable antistick surface. This experimental study revealed that the HVOF sprayed WC-CoCr coating transiting from hydrophilicity during as-sprayed to hydrophobicity after 15 days of exposure to atmospheric condition.