Preparation method of Ni-B/B4C nano composite plating through pulse electrodeposition

Abstract

The invention discloses a preparation method of Ni-B / B4C nano composite plating through pulse electrodeposition. The preparation method comprises the steps that S1, a steel sheet base body is pretreated; S2, an electroplating solution is prepared, wherein the electroplating solution comprises the following components according to the concentration: 240 g / L of nickel sulfate, 45 g / L of nickel chloride, 30 g / L of boric acid, 0.5 g / L of saccharin, 3 g / L of dimethylamine borane, 0.1 g / L of a surfactant and 1-5 g / L of B4C nano particles; S3, an electrodeposition process is conducted, specifically, the pretreated base body is put into the prepared electroplating solution to be subjected to electrodeposition; the technological parameters in the pulse electroplating process are as follows: the pulse frequency is 1000 Hz, the duty ratio is 40%, the time is 30 min, and the magnetic stirring rate is 400 rmp; and S4, after electrodeposition is finished, the surface of a plated part is subjected to ultrasonic cleaning through ethyl alcohol and pure water in sequence. The Ni-B / B4C nano composite plating prepared by the method has excellent corrosion resistance, higher microhardness and lower friction coefficient, and the comprehensive performance of the Ni-B / B4C nano-composite plating is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a kind of Ni-B / B prepared by pulse electrodeposition 4 C nanocomposite coating method. Background technique [0002] Ni-B coating has excellent properties such as high hardness, high wear resistance, uniform thickness, high density, low porosity and good ductility. These properties make them strong candidates for different applications. Compared with Ni-P coating, Ni-B coating has certain limitations and weaknesses, such as low corrosion resistance. In a real industrial environment, corrosion and wear can occur simultaneously. Therefore, it is crucial to enhance the properties of the binary Ni-B coating so that it can be used under harsher conditions while providing protection against corrosion and wear. In this regard, those skilled in the art have used different methods and fillers to make different attempts. [0003] It is a simple and effective way to solve the ab...

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Problems solved by technology

[0004] However, the wear resistance of existing nanocomposite coatings is general. After adding nanomaterials, the friction coefficient of the coating tends to increase. Therefore, the existing nanocomposite coatings have high wear resistance, high hardness and high corrosion resistance. incompatible problem

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