Paper Title
The Influence Of Inconel 625 Powder Cladding On Stainless Steel: Electrochemical And Surface Study

Abstract
Passivity behavior of materials could impact their corrosion performance especially in the case of localized attacks. Potentiodynamic polarization test was carried out on wrought alloy 625 to evaluate its anodic behavior. A comparison with laser cladded stainless steel with Inconel 625 powder coating (1.5mm thickness) was established. Microstructural analysis shows that the surface of laser cladded and wrought alloy is different. The top surface of clad material has some inhomogeneity. The electrochemical results show similar anodic behavior for wrought and clad alloys. No pitting was observed in both and the increase in current density after breakdown potential was due to transpassivity. Therefore, the cladding, although requires further improvement to reduce fusion related defects, could change the passivity behaviour of stainless steel and makes it more similar to wrought alloy 625. Keywords - Laser Clad Coatings; Cladding; Crevice Corrosion; Inconel 625; Passivity behavior; Polarization.