Method for preparing Ni-P-UFD composite coating by chemical plating or electroplating process

Abstract

The invention discloses a method for preparing a nickel-phosphorus-ultrafine diamond (Ni-P-UFD) composite coating by a chemical plating or electroplating process. The method comprises the following steps of: performing a surface activation treatment before plating; selecting a proper chemical plating or electroplating solution formula; adding a special amphoteric surfactant; uniformly dispersing the ultrafine diamond grains (UFD) into the Ni-P chemical plating and electroplating solution by using radio frequency ultrasonic dispersion technology; and continuously introducing argon gas (Ar) into the bottom of a plating solution container during the chemical plating or electroplating process and continuously and mechanically stirring the solution to prepare the Ni-P-UFD composite coating with higher hardness, wear resistance and high-temperature performance than those of the conventional Ni-P coating while ensuring that the plating solution is not decomposed or precipitated and the chemical and physical properties are stable and reliable. The method solves the problem of homodisperse of second-phase grains of the ultrafine diamond in the plating solution and the film layer.

Description

technical field [0001] The present invention relates to electroless plating or electroplating process technology, nano particle uniform dispersion technology, material surface treatment technology, especially prepare Ni-P-UFD (nickel-phosphorus-ultramicrodiamond ) method of composite coating. Background technique [0002] In the past 20 years, the material surface engineering technology has developed rapidly, and various functional multi-component special composite coatings have been widely used in production. The application fields involve aerospace engineering, electronics industry, machinery manufacturing, instrumentation manufacturing, energy transportation engineering, In technical departments and fields such as information and military engineering, the technology of preparing special composite coatings on the surface of materials and workpieces has become a special means of surface modification of materials. With the development and progress of related technologies in...

AI Technical Summary

Problems solved by technology

The prior art has the following problems: Under the influence of factors such as high temperature of electroless plating or electroplating, strong acid-base bath conditions, and strong agglomeration of UFD nanoparticles in the bath, it is easy to cause The UFD nanoparticles in the plating solution are agglomerated and precipitated. At the same time, the large number of dangling bonds on the surface of the UFD particles themselves can easily cause changes in the chemical and physical properties of the plating solution, resulting in unstable Ni-P composite coating process. UFD nanoparticles in Ni-P -Uneven distribution of UFD composite coating

[0006] In order to solve the problems existing in the existing technology, new methods and processes must be developed to solve the preparation problems of Ni-P-UFD composite coatings in the electroless plating or electroplating process, and to expand the application field of Ni-P-UFD composite coatings

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