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

A preparation process, chemical composite plating technology, applied in the direction of metal material coating process, coating, liquid chemical plating, etc., can solve the problems that the plating process is difficult to achieve, and achieve stable solution, fast deposition speed, good resistance The effect of corrosion

Inactive Publication Date: 2007-10-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the presence of SiC particles in the composite plating solution, the plating solution is easy to decompose, and the conventional plating process for preparing Ni-P-SiC composite coatings is difficult to achieve.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: On a Q235 steel sample of 20mm*25mm*5mm, a Ni-P-SiC chemical composite coating with a thickness of about 15 μm was prepared. Specific preparation steps:

[0025] Pretreatment of SiC particles (W3.5): Before composite plating, the SiC powder was immersed with a 1:1 hydrochloric acid solution for 24 hours to remove metal impurities, then washed with distilled water until neutral, and dried for later use.

[0026] Dispersion method: The dispersion method of ultrasonic dispersion + magnetic stirring + surfactant is adopted. That is to say, add a small amount of distilled water and surfactant to the treated SiC, first disperse it with ultrasonic waves for 0.5h, and then add it to the plating solution and stir it with an electric stirrer for 1-2h, so that the SiC can be fully infiltrated with water, and the composite plating is carried out. Stir with a magnetic stirrer.

[0027] Main salt NiSO 4 ·6H 2 O 26g / L

[0028] reducing agent NaH 2 PO 2 ·H 2 O 30g / L ...

Embodiment 2

[0045] Example 2: On a Q235 steel sample of 20mm*25mm*5mm, a Ni-P-SiC chemical composite coating with a thickness of about 25 μm was prepared. Specific preparation steps:

[0046] Pretreatment of SiC particles (W3.5): Before composite plating, the SiC powder was immersed with a 1:1 hydrochloric acid solution for 24 hours to remove metal impurities, then washed with distilled water until neutral, and dried for later use.

[0047] Dispersion method: The dispersion method of ultrasonic dispersion + magnetic stirring + surfactant is adopted. That is to say, add a small amount of distilled water and surfactant to the treated SiC, first disperse it with ultrasonic waves for 0.5h, and then add it to the plating solution and stir it with an electric stirrer for 1-2h, so that the SiC can be fully infiltrated with water, and the composite plating is carried out. Stir with a magnetic stirrer.

[0048] Main salt NiSO 4 ·6H 2 O 26g / L

[0049] reducing agent NaH 2 PO 2 ·H 2 O 30g / L

...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/50
Inventor 张树生程林韩克江
Owner SHANDONG UNIV
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