Pulse-electrodeposited Ni-Co-P/HBN composite plating and preparation method thereof

Abstract

A pulse-electrodeposited Ni-Co-P / HBN composite plating and a preparation method thereof. The preparation method adopts a metal material as a substrate, and comprises the following steps: firstly pretreating the substrate surface, preparing a composite plating solution with nickel sulfate, cobalt chloride, sodium hypophosphite, citric acid, trisodium citrate, boric acid, and polyvinyl alcohol as main components and hexagonal boron nitride HBN powder as a dispersed phase, performing surface modification and dispersion treatment of the HBN particles by using a surfactant through ultrasonic vibration, allowing the HBN particles to disperse uniformly in the plating solution through reasonable setting of pulse electrodeposition parameters and full stirring, performing codeposition and heat treatment of the HBN particles and the substrate metal nickel cobalt phosphor in a state of applying pulsed current so as to obtain a corrosion-resistant, wear-resistant and antifriction pulse-electrodeposited Ni-Co-P / HBN composite plating. The invention overcomes defects of single component of current composite plating, coarse plating crystal grain, low interface bonding strength with the substrate, non-ideal comprehensive properties of corrosion resistance, wear resistance, and antifriction, and the like; the pulse-electrodeposited Ni-Co-P / HBN composite plating of the invention is applicable to wear-resistant, antifriction and corrosion-resistant surface plating of friction kinematic pair parts in industries of machinery, metallurgy, chemical engineering, and the like.

Description

technical field [0001] The invention relates to a pulse electrodeposited Ni-Co-P / HBN composite coating and a preparation method thereof. Background technique [0002] The high hardness, high wear resistance and high corrosion resistance of the Ni-P alloy coating make it widely used in the fields of machinery, petroleum, chemical industry, etc., especially adding insoluble solid particles to the nickel phosphorus plating solution to make the matrix metal Co-deposited with solid particles to form a better nickel-phosphorus composite coating, this type of nickel-phosphorus composite coating can further improve the structure and performance of the coating, such as the structure of the composite coating is denser, their physical and chemical properties, thermal stability, resistance The antifriction performance of grinding has been further improved, and the multifunctional composite coating has become a new development direction for composite material preparation and material sur...

AI Technical Summary

Problems solved by technology

Even in the same plating solution system, due to the different surface structures and charging properties of different dispersed particles, their deposition amount in the matrix metal is very different, that is, some particles are easier to deposit in a certain plating solution, and some particles are easier to deposit in a certain plating solution. The amount of particle deposition is little or almost no deposition, so the surface modification of dispersed particles is very critical for the successful preparation of composite coatings; the stability of the plating solution of electroless Ni-P composite coatings is poor, and dispersed particles are more likely to aggravate the decomposition of the plating solution. The service life of the plating solution is short, and secondly, the temperature of the plating solution required for electroless Ni-P composite coating is high, the deposition speed is slow, the energy consumption is high, and the processing cost is high; , dense coating, and fine grains, which have attracted widespread attention at home and abroad

Images