Activated solution of magnesium alloy surface micro-arc oxidation ceramic coating surface and activation method

A technology of micro-arc oxidation and surface activation, applied in the field of micro-arc oxidation on the surface of magnesium alloy ceramic layer surface direct activation solution, the field of direct activation solution on the surface of ceramic layer, can solve the problems of efficiency reduction, heating, cost increase, etc., to improve efficiency, cost reduction effect

Inactive Publication Date: 2010-04-14
HOHAI UNIV CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patents 200510031184 and 200410033613 describe a formulation of silver activation and palladium activation solutions for ceramic surfaces respect

Method used

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  • Activated solution of magnesium alloy surface micro-arc oxidation ceramic coating surface and activation method
  • Activated solution of magnesium alloy surface micro-arc oxidation ceramic coating surface and activation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] First, take 2 / 3 of distilled water in a 10L tank, dissolve 1000g sodium fluoride and 800g nitric acid (70%) in turn, after all the reagents in the tank are dissolved, pour 100mL triethanolamine into the tank under rapid stirring until Mix completely and evenly, and finally add water to 10L to obtain an activation solution, immerse the magnesium alloy sample for preparing the micro-arc oxidation ceramic layer in it for 20 seconds, take it out and wash it with water, and immediately immerse it in the electroless copper plating solution. Electroless copper plating on the surface of the activated ceramic layer has strong adhesion and good uniformity. figure 1 It is a scanning electron microscope photo of copper plating on the surface of the micro-arc oxidation ceramic layer on the surface of magnesium alloy. It can be seen from the figure that the copper plating layer and the micro-arc oxidation ceramic layer are bonded together through meshing. The surface of the copper pla...

Embodiment 2

[0014] First, take 2 / 3 of deionized water in a 10L tank, successively dissolve 800g of ammonium bifluoride and 1000g of phosphoric acid (85%), after all the reagents in the tank are dissolved, pour 200mL of glycerol into the tank under rapid stirring Mix until it is completely uniform, and finally add water to 10L to obtain an activation solution, immerse the magnesium alloy sample for preparing the micro-arc oxidation ceramic layer in it for 40 seconds, take it out and wash it with water, and then immediately immerse it in the electroless nickel plating solution. Electroless nickel plating on the surface of the activated ceramic layer has strong adhesion and good uniformity.

Embodiment 3

[0016] First, get 2 / 3 distilled water in a 10L tank, successively dissolve 1000g ammonium bifluoride and 600g nitric acid (70%), after all the reagents in the tank are dissolved, pour 300mL glycerol into the tank solution under rapid stirring, Until it is completely mixed and uniform, finally add water to 10L to obtain an activation solution, immerse the magnesium alloy sample for the preparation of the micro-arc oxidation ceramic layer for 30 seconds, take it out and wash it with water, and immediately immerse it in the electroless copper plating solution. Electroless copper plating on the surface of the activated ceramic layer has strong adhesion and good uniformity.

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Abstract

The invention relates to activated solution of a magnesium alloy surface micro-arc oxidation ceramic coating surface and an activation method, which belong to the technical field of magnesium alloy surface processing. The activated solution comprises components by weight percentage: fluoride salts: 5-10%, inorganic acid: 3-10%, organic matter: 1-5%, and water: 80-85%. The activation method includes immersing magnesium alloy samples for preparing micro-arc oxidation ceramic coatings into the prepared magnesium alloy surface micro-arc oxidation ceramic coating activated solution for 10-60 seconds, and immediately immersing the magnesium alloy samples into electroless plating copper solution or electroless plating nickel solution after being taken out and washed by water. The invention increases efficiency, and formed ceramic coating activated surfaces can enable copper and nickel deposition to be uniform and fine in adhesion force.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy surface treatment, and relates to a solution for directly activating the surface of a ceramic layer, in particular to a solution for directly activating the surface of a ceramic layer by micro-arc oxidation on the surface of a magnesium alloy. Background technique [0002] Magnesium alloys are easily corroded in various corrosive media. The micro-arc oxidation ceramic layer on the surface of magnesium alloy can improve its corrosion resistance, but the corrosion protection and decoration are still poor because magnesium oxide is loose and porous. In order to ensure the performance of the product, the magnesium alloy micro-arc oxidation ceramic layer is usually post-treated, among which copper plating, nickel plating, etc. are one of them. Activation treatment is usually required before copper and nickel plating on the ceramic surface. The principle of activation treatment is to form a fr...

Claims

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Application Information

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IPC IPC(8): C25D11/30C25D5/42
Inventor 蒋永锋包晔峰
Owner HOHAI UNIV CHANGZHOU
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