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

A technology of pulse electrodeposition and composite coating, applied in coatings, electrolytic coatings, etc., can solve the problems of short service life of the plating solution, aggravated the decomposition of the plating solution, poor stability of the plating solution, etc. Eliminate the effect of agglomeration and foaming

Inactive Publication Date: 2012-07-04
HUNAN UNIV OF SCI & TECH
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  • Abstract
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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 coati

Method used

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

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Embodiment approach

[0051] Form description:

[0052] Table 1 is the chemical composition table of 45 steel used in the present invention, red copper T2, aluminum-silicon alloy ZL109 and stainless steel 1Cr13 matrix material.

[0053] Table 2 is the main composition and process parameters of the plating solution in Examples 1-16 of the pulse electrodeposited Ni-Co-P / HBN composite coating of the present invention.

[0054] Combined with the figures and tables, a pulse electrodeposited Ni-Co-P / HBN composite coating of the present invention and its preparation method, it uses metal materials as the substrate, the surface of the substrate is pretreated first, and then nickel sulfate, cobalt chloride , sodium hypophosphite, citric acid, trisodium citrate, boric acid, and polyvinyl alcohol as the main components, and the composite plating solution with hexagonal boron nitride HBN powder as the dispersed phase. In the plating solution, through reasonable setting of pulse electrodeposition process param...

Embodiment 1

[0059] The base material is 45 steel, the chemical composition is shown in the figure (table), the sample size is: 50mm×12mm×2mm, the preparation operation steps of Ni-Co-P / HBN composite coating on the surface of 45 steel:

[0060] ① 45 steel surface degreasing treatment, the formula is mass fraction: sodium hydroxide 20g / L, sodium carbonate 30g / L, sodium phosphate 8g / L, OP-10 emulsifier 2ml / L volume fraction; temperature 80°C;

[0061] ② Rust removal treatment on the surface of 45 steel, the formula is: sulfuric acid 100ml / L volume fraction, hexamethylenetetramine 12g / L mass fraction, temperature 50°C;

[0062] ③ Use 180#, 360#, 600# sandpaper to polish the 45 steel after degreasing and derusting treatment in sequence, then use acetone to ultrasonically clean the surface of the substrate, and dry it for later use;

[0063] ④ Surface modification treatment of HBN particles: HBN powder was treated with 20% HCl solution to remove iron and impurities, soaked for 24 hours, and the...

Embodiment 2

[0069] The base material is 45 steel, the chemical composition is shown in the figure (table), the sample size is: 50mm×12mm×2mm, the preparation operation steps of Ni-Co-P / HBN composite coating on the surface of 45 steel:

[0070] ① 45 steel surface degreasing treatment, the formula is mass fraction: sodium hydroxide 20g / L, sodium carbonate 30g / L, sodium phosphate 8g / L, OP-10 emulsifier 2ml / L volume fraction, temperature 80°C;

[0071] ② Rust removal treatment on the surface of 45 steel, the formula is: sulfuric acid 100ml / L volume fraction, hexamethylenetetramine 12g / L mass fraction, temperature 50°C;

[0072] ③ Use 180#, 360#, 600# sandpaper to polish the 45 steel after degreasing and derusting treatment in sequence, then use acetone to ultrasonically clean the surface of the substrate, and dry it for later use;

[0073] ④ Surface modification treatment of HBN particles: HBN powder was treated with 20% HCl solution to remove iron and impurity, soaked for 24 hours, and then ...

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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...

Claims

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Application Information

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IPC IPC(8): C25D15/00C25D3/56C25D5/18
Inventor 彭成章胡斌梁朱玲玲唐思文
Owner HUNAN UNIV OF SCI & TECH
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