Electrophoretic Deposition and Corrosion Resistance of TiB2-Chitosan Coating on 6Cr13 Martensitic Stainless Steel

Abstract

In this paper, TiB2-Chitosan coating was successfully fabricated on the surface of 6Cr13 martensitic stainless steel by electrophoretic deposition. The effects of different deposition voltage and deposition time on the coating morphology were investigated. The adhesion strength of the coating was characterized by Rockwell indentation, and it was proved that the adhesion strength of the coating was within HF1 degree. The corrosion resistance of coatings with different immersion time was studied by electrochemical test. The result shows that the 40 V/60 s sample has optimal comprehensive performance, and the TiB2-Chitosan coating can significantly improve the corrosion resistance of the substrate. The corrosion resistance of the coating decreases with the prolongation of the immersion time.