Study on the Anticorrosion Property of Electroless Plating Ni-P Complex Layer

Directing against the high requirement of corrosion resistance to seawater, three electroless composite plating layers were investigated in this paper. They are: plating layer + chromate sealing, plating layer + organic sealing and double Ni plating layer. The thickness ratio of high and medium phosphorus layers in double Ni plating layer was optimized. The results showed that all these plating layers can reduce effectively the porosity and improve corrosion resistance.