Composite plating Ni - P - SiC in high phosphor, and preparation method

Abstract

This invention relates to a process for preparing wear- and corrosion-resistant high-phosphorus Ni-P-SiC composite plating layer. The addition of SiC particles into the Ni-P-SiC composite plating layer can improve the hardness and wear resistance of the plating layer, thus can improve the wear resistance of mechanical parts and prolong their service life. The plating solution has such advantages as high stability, high bath plating temperature, high deposition speed and easy control. The obtained high-phosphorus Ni-P-SiC composite plating layer has a high bonding strength with the matrix, and has excellent wear and corrosion resistance.

Description

1. Technical field

[0001] The invention relates to a high-phosphorus Ni-P-SiC composite coating and a preparation process thereof, and is particularly suitable for preparing a high-hardness and wear-resistant coating. 2. Background technology

[0002] Electroless composite plating is a surface treatment technology developed on the basis of electroless plating. Solid particles such as SiC are added to the plating solution, and the solid particles are suspended in the solution by stirring to realize the co-deposition of the dispersed particles and the base metal. Preparation of functional coatings with high hardness, wear resistance, self-lubrication, corrosion resistance and other characteristics.

[0003] During Ni-P electroless plating, when the phosphorus content in the coating is controlled above 8.7%, the electroless Ni-P alloy coating is deposited in the form of an amorphous structure. Good corrosion resistance, but its wear resistance is poor. The Ni-P-SiC composite ...