At MBI, we apply HVOF coatings using a unique system that has even faster material particle velocities, resulting in what is called “Impact Fusion”. For starters, the particles are practically forge welded (heated and then hammered together) onto the surface and onto each other to form the coating. In fact, higher particle velocities and Impact Fusion result in denser, better bonded coatings. Because of this, compressive stresses within the coating ensure very high adhesion (even at thicker coatings). Conventional or competitive HVOF coatings have higher residual stresses which are in tension. As a result, this condition can cause cracking or dis-bonding. However, MBI’s HVOF coatings will not dis-bond because they are in compression. In the end, better coating integrity, enhanced corrosion properties, and improved thermal fatigue properties are the final products.
Without a doubt, MBI’s HVOF process provides carbide & metal coatings unsurpassed quality and wear life. Essentially, the HVOF gun is a liquid fueled rocket running at high pressure. It imparts extremely high velocity molten coating particles. This velocity is much higher than other application methods. Higher velocity means higher quality coatings in terms of bond, wear, and corrosion.