Metallized plating solution and method for metallizing surface of magnesium alloy product

A surface metal and magnesium alloy technology, applied in the field of materials, can solve the problems of poor surface adhesion of the plated metal, easy peeling off of the plated metal, active chemical properties, etc., and achieve bright surface color, high surface quality, and high surface adhesion. Effect

Inactive Publication Date: 2014-09-10
董武祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the low standard electrode potential of magnesium and its active chemical properties, it will suffer severe electrochemical corrosion in humid air, sulfur-containing atmosphere and marine atmosphere. Therefore, surface protection measures are generally taken to improve its corrosion resistance. For example, on the surface of the metal layer, because the method of metal coating on the surface of magnesium alloy products still has certain technical difficulties, so there is a problem that the surface adhesion of the coated metal is poor, especially the problem that the coated metal is easy to fall off after impact

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Put the pre-plated product in the degreasing agent, soak for 5-10 minutes, remove the oil on the surface, then wash off the degreasing agent with clean water, wash 5-10s each time, and rinse 3 times.

[0022] 2. Pickle the pre-plated product in acidic lotion (water as solvent) at 18°C ​​for 3 minutes. Each liter of acidic lotion contains: 150mL of phosphoric acid and 80g of ammonium bifluoride. -10s, wash off the acidic lotion.

[0023] 3. Place the pre-plated product in an acidic activation solution (solvent is water) at 40°C and let it stand for 1-3 minutes to remove the black film on the surface of the product. Each liter of the acidic activation solution contains: reagent grade hydrochloric acid 30mL, 40% (v %) hydrofluoric acid 80mL, and then rinsed with water 3 times, each time for 5-10s, to wash away the acidic activation solution.

[0024] 4. Place the pre-plated product in an alkaline activation solution (water as the solvent) at 50°C and let it stand for 1...

Embodiment 2

[0029] 1. Put the pre-plated product in the degreasing agent, soak for 5-10 minutes, remove the oil on the surface, then wash off the degreasing agent with clean water, wash 5-10s each time, and rinse 3 times.

[0030] 2. Pickling the pre-plated product in acidic lotion (water as solvent) at 30°C for 3 minutes. Each liter of acidic lotion contains: 100mL of phosphoric acid and 50g of ammonium bifluoride. -10s, wash off the acidic lotion.

[0031] 3. Place the pre-plated product in an acidic activation solution (solvent is water) at 60°C and let it stand for 1-3 minutes to remove the black film on the surface of the product. Each liter of the acidic activation solution contains: reagent grade hydrochloric acid 30mL, 40% (v %) hydrofluoric acid 80mL, and then rinsed with water 3 times, each time for 5-10s, to wash away the acidic activation solution.

[0032] 4. Put the pre-plated product in the alkaline activation solution (solvent is water) at 70°C and let it stand for 1-2 mi...

Embodiment 3

[0037] 1. Put the pre-plated product in the degreasing agent, soak for 5-10 minutes, remove the oil on the surface, then wash off the degreasing agent with clean water, wash 5-10s each time, and rinse 3 times.

[0038] 2. Pickle the pre-plated product in acidic lotion (water as the solvent) at 25°C for 3 minutes. Each liter of acidic lotion contains: 125mL of phosphoric acid and 65g of ammonium bifluoride. -10s, wash off the acidic lotion.

[0039] 3. Place the pre-plated product in an acidic activation solution (solvent is water) at 50°C and let it stand for 1-3 minutes to remove the black film on the surface of the product. Each liter of the acidic activation solution contains: reagent grade hydrochloric acid 30mL, 40% (v %) hydrofluoric acid 80mL, and then rinsed with water 3 times, each time for 5-10s, to wash away the acidic activation solution.

[0040] 4. Place the pre-plated product in an alkaline activation solution (water as the solvent) at 60°C and let it stand for...

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PUM

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Abstract

The invention discloses a metallized plating solution and a method for metallizing the surface of a magnesium alloy product. Every one littler of metallized plating solution comprises 15g of nickel sulfate, 25g of sodium hypophosphite, 20mL of 20% sodium hydroxide and 3g of lithium fluoride, wherein the solvent is water. The method for metallizing the surface of the magnesium alloy product comprises the following steps: degreasing; acid washing; acid activating; alkaline activating; chemical nickel-plating; electrolyzing and activating; and copper plating and chrome brightening. The metallized plating solution disclosed by the invention has the beneficial effects that the coating made from the metallized plating solution has high wear resistant and corrosion resistant performances and particularly has an extremely strong adhesive to a matrix; if even the product is broken, falling of the plating layer is further avoided; the plated part obtained by the method provided by the invention has the advantages of bright surface luster and color, very high surface quality and excellent wear resistant and corrosion resistant performances; the plated part still can maintain a very high adhesive force under a high impact.

Description

technical field [0001] The invention relates to a metallization bath and a method for metallization of the surface of a magnesium alloy product, which belongs to the field of material technology. Background technique [0002] Magnesium alloy is currently the lightest metal structural material in industrial applications. Because of its low density, high specific strength and specific stiffness, good damping performance, easy cutting, easy recycling, etc., it is different from other engineering structural materials such as steel and aluminum alloys. It has obvious comparative advantages, so it has been widely used in aerospace, automobile, 3C and many other fields. [0003] However, due to the low standard electrode potential of magnesium and its active chemical properties, it will suffer severe electrochemical corrosion in humid air, sulfur-containing atmosphere and marine atmosphere. Therefore, surface protection measures are generally taken to improve its corrosion resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/36C23C28/02
Inventor 董武祥权高峰苏鑫鑫董光川
Owner 董武祥
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