Study on Corrosion Resistance of Electroless Plating Ni-P Complex Coating

摘要

For components in equipment that are used in the littoral with a high requirement for corrosion resistance, the design project of electroless plated nickel-phosphorus complex deposit was put forward in the paper. The treating process of chromate sealing and organic porosity sealing for the surface of the deposit was optimized. By applying two different types of electroless plating solution, a double layer electroless plating deposit with 120mV of stable potential difference was prepared. The design of complex deposit can efficiently reduce porosity and improve the corrosion resistance of the deposit. Through X-ray diffractometer (XRD) and scanning electron microscope (SEM), the phase structure, constituent and chemical form were analyzed, which settled the foundation for the application of amorphous state Ni-P alloy on equipment.