Study on Corrosion and Wear Resistance of Titanizing Coating on Steel Surface

摘要

Titanizing coating was prepared by infiltration of titanium compoundparticles on Cr12MoV (ASTM: D2) steel surface using thermaldiffusion (TD) process in salt bath. Self-corrosion current of the coatedspecimen in 3.5% NaCl solution was smaller by two orders ofmagnitude than that of uncoated specimen. The wear weight loss ofuncoated specimen was eleven times more than that of coated withinthe same testing period. The morphology, structure and mechanicalproperties of the titanizing coating were further investigated. Theresults indicate that the titanizing coating was composed of densifiedTiC crystals. The hardness reaches 3000HV0.1 when the thickness ofcoating is greater than 10μm.