The preparation of corrosion resistant palladium films on 316L stainless steel by brush plating

Palladium films with good adhesive strength were deposited on 316L stainless steel by brush plating. The palladium plated stainless steel samples showed excellent corrosion resistance in reducing mediums such as boiling 20% H2SO4. The brush-plating parameters have obvious influences on electrochemical properties of the palladium films. As the brush-plating voltage and the brushing speed increase, the open circuit potential and the impedance of the plated samples decrease, and the anodic current density increases. The effects of brush-plating parameters on corrosion behaviors of the films are mainly attributed to the effect of co-deposited hydrogen in the films. When hydrogen is removed from the Pd films by heat treatment, corrosion resistance of the films turns better.