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Magnesium alloy direct chemical plating NI-P-SiC plating solution formula and plating process

A ni-p-sic and electroless plating technology, which is applied in the direction of liquid chemical plating, metal material coating process, coating, etc., can solve the problem of poor corrosion resistance and wear resistance of magnesium alloy electroless nickel plating layer, high cost, Solving problems such as difficulty in preparation of electroless nickel plating solution for magnesium alloys, to achieve the effect of good combination, stable plating solution and simplified plating solution preparation process

Inactive Publication Date: 2012-07-04
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems in the prior art that it is difficult to prepare electroless nickel plating solution for magnesium alloys, the cost is high, and the corrosion resistance and wear resistance of the electroless nickel plating layer of magnesium alloys are poor, the purpose of the present invention is to provide a magnesium alloy electroless composite plating Ni-P-SiC Plating Solution Formula and Plating Process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A plating process and method for electroless Ni-P-SiC plating on a magnesium alloy, comprising the steps of:

[0035] 1. Prepare the electroless Ni-P plating solution, and weigh the medicine according to the above formula 1: first dissolve the above medicine with a small amount of distilled water, then dilute the mixed water to 1L, and adjust the pH value to 4.8 with concentrated ammonia water.

[0036] 2. Pretreatment of SiC particles: Before composite plating, SiC powder is dipped in 1:1 hydrochloric acid solution for 24 hours to remove impurities, then finely neutralized with distilled water, dehydrated with ethanol, and dried for later use.

[0037] 3. Prepare SiC dispersion liquid and composite plating liquid: weigh the medicine according to the above formula and mix them as the dispersion liquid. Mix 2 g of the treated SiC particles with a small amount of distilled water and the above-mentioned surfactant, first ultrasonically disperse for 30 minutes, then add a s...

Embodiment 2

[0042] A kind of electroless Ni-P-SiC plating process and method for magnesium alloy, concrete steps are as follows:

[0043] 1. Prepare the electroless Ni-P plating solution, and weigh the medicine according to the above formula 2: first dissolve the above medicine with a small amount of distilled water, then mix and dilute to 1L, and adjust the pH value to 5.2 with concentrated ammonia water.

[0044] 2. Pretreatment of SiC particles: Before composite plating, SiC powder is dipped in 1:1 hydrochloric acid solution for 24 hours to remove impurities, then finely neutralized with distilled water, dehydrated with ethanol, and dried for later use.

[0045] 3. Preparation of SiC dispersion liquid and composite plating liquid: Weigh 40 mg of sodium dodecylbenzene sulfonate and 20 mg of polyethylene glycol as dispersion liquid, mix 6 g of treated SiC particles with a small amount of distilled water and surfactant, and ultrasonically Disperse for 30 minutes, then add a small amount o...

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Abstract

The invention provides a magnesium alloy direct chemical plating NI-P-SiC plating solution formula and a plating process. The formula consists of chemical plating Ni-P plating solution and SiC dispersing solution, wherein the chemical plating Ni-P plating solution comprises 20-30g / l of nickel sulfate, 20-30g / l of sodium hypophosphite, 15-30g / l of complexing agent, 15-25g / l of sodium acefate, 10-20g / l of fluoride, 1-2mg / l of stablizer, appropriate amount of pH value modifier and the balance of water; the SiC dispersing solution is formed by stirring 10-80mg / l of surface active agent and 1-8g / lof micron SiC by magnetic force; and after pretreatment of the magnesium alloy, a Ni-P-SiC composite plating layer with thickness being 20-50Mum is obtained under the process conditions that the temperature is 80-90 DEG C, the pH value is 4.8-5.6, and the plating time is 60-120 minutes. In the invention, basic nickel carbonate is replaced by nickel sulfate which is introduced as main salt; and the micron SiC is added to conduct plating directly; on the base of keeping the excellent performance of magnesium alloy chemical plating Ni-P alloy, the rigidity and abrasive resistance of the magnesium alloy chemical plating layer are greatly improved; the problem of lower abrasive resistance of magnesium alloy nickel-plating layer is solved; and the preparation of the plating solution is convenient, the cost is low, the plating solution is stable and the deposition rate is quick.

Description

technical field [0001] The invention relates to a chemical composite plating solution formula and a plating process, in particular to a magnesium alloy direct chemical plating Ni-P-SiC plating solution formula and a plating process method, belonging to the technical field of magnesium alloy surface treatment. Background technique [0002] Magnesium alloys have broad application prospects in aerospace, electronic communications, automobile manufacturing, national defense and military industries due to their low density, high specific strength, high specific stiffness, and good casting and cutting properties. However, poor corrosion resistance and wear resistance are the main factors restricting the wide application of magnesium alloys. Therefore, it is of great significance to enhance the corrosion resistance and wear resistance of magnesium alloys. [0003] According to the results of scientific and technological novelty searches and patent searches, the traditional electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/36
Inventor 沟引宁黄伟九
Owner CHONGQING UNIV OF TECH
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