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Preparation method of aluminum alloy and rare earth nickel base electromagnetic shielding layer

An electromagnetic shielding layer, aluminum alloy technology, applied in metal material coating process, coating, liquid chemical plating and other directions, can solve the problems of inability to meet the electromagnetic shielding requirements of products, high cost, large surface resistance, etc. Shielding and anti-corrosion, low cost, excellent shielding performance

Active Publication Date: 2012-03-21
晋宁理工恒达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the conventional anodic oxide anodized film has good protection and wear resistance, it cannot meet the electromagnetic shielding requirements of the product due to its high surface resistance.
Traditional metal shielding materials mostly use iron, silicon steel sheets, stainless steel, permalloy, etc. to process them into thin sheets, thin strips and other single materials, and the cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Put the electronic components made of aluminum alloy into the electroless plating solution for 10-15 minutes and then take them out to air dry. The surface of the aluminum alloy substrate is modified, and a layer of rare earth with a thickness of 0.01mm and a plating hardness of 600Hv is obtained on the surface of the aluminum alloy substrate. Nickel based electromagnetic shielding layer. The electroless plating solution contains 0.10~0.13mol / L NIC1 2 ·6H 2 O, 0.02~0.03mol / LFeSO 4 ·7H 2 O, 0.03~0.04mol / L dimethylaminoborane, 0.07~0.09mol / L Na 2 C 4 h 4 o 6 2H 2 O, 0.07~0.075 mol / L glycine, 0.035~0.05mol / L H 3 BO 3 , 1×10 -3 mol / L stabilizer, micro-nano molybdenum disulfide particles 3g / L, use KOH to adjust the pH value of the electroless plating solution to 7~8, and then put the aluminum alloy substrate into it. The reducing agent is formulated from hypophosphite, borohydride, and dimethylaminoborane (DMAB), and the ratio is 1:3:2. Stabilizer is Ce salt nam...

Embodiment 2

[0014] Put the product made of aluminum alloy into the chemical plating solution for 10 to 15 minutes and then take it out, and obtain a rare earth nickel-based electromagnetic shielding layer with a thickness of 0.05mm and a plating hardness of 650Hv on the surface of the aluminum alloy substrate; the chemical plating solution Contains 0.10~0.13mol / L NIC1 2 ·6H 2 O, 0.02~0.03mol / LFeSO 4 ·7H 2 O, 0.03~0.04mol / L dimethylaminoborane, 0.07~0.09mol / L Na 2 C 4 h 4 o 6 2H 2 O, 0.07~0.075 mol / L glycine, 0.035~0.05mol / L H 3 BO 3 , 2×10 -3 mol / L stabilizer LaC1 3 , Molybdenum disulfide particles of micro-nano scale 4g / L, adjust the pH value of the electroless plating solution to 7~8 with KOH or / and NaOH, and then put the aluminum alloy substrate into it. The reducing agent is formulated from hypophosphite, borohydride, and dimethylaminoborane (DMAB), the ratio is: 1:3:2, and the stabilizer is La salt, namely LaC1 3 .

Embodiment 3

[0016] Put the product made of cast aluminum into the chemical plating solution for 10~15 minutes and then take it out. The surface of the aluminum alloy substrate is modified to obtain a layer of rare earth nickel with a thickness of 0.1mm and a hardness of 550Hv on the surface of the aluminum alloy substrate. base electromagnetic shielding layer; the chemical plating solution contains 0.10~0.13mol / L NIC1 2 ·6H 2 O, 0.02~0.03mol / LFeSO 4 ·7H 2 O, 0.03~0.04mol / L dimethylaminoborane, 0.07~0.09mol / L Na 2 C 4 h 4 o 6 2H 2 O, 0.07~0.075 mol / L glycine, 0.035~0.05mol / L H 3 BO 3 , 1.5×10 -3 mol / L stabilizer, micro-nano molybdenum disulfide particles 5g / L, use KOH or / and NaOH to adjust the pH value of the electroless plating solution to 7~8, and then put the aluminum alloy substrate into it. The original agent is prepared from hypophosphite, borohydride, dimethylaminoborane (DMAB), the ratio is: 1:3:2, and the stabilizer is Ce C1 2 and LaC1 3 mixture.

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Abstract

The invention discloses a preparation method of an aluminum alloy and rare earth nickel base electromagnetic shielding layer. The method comprises the steps of placing the aluminum alloy base material into chemical plating solution for 10-15 minutes and taking out, so that a rare earth nickel base electromagnetic shielding layer with the thickness of 0.01-0.1mm and the plated state hardness of 550-650Hv is obtained on the surface of the aluminum alloy base material, wherein the chemical plating solution comprises 0.10-0.13mol / L NiC12.6H2O, 0.02-0.03mol / L FeSO4.7H2O, 0.03-0.04mol / L reducing agent, 0.07-0.09mol / L Na2C4H4O6.2H2O, 0.07-0.075mol / L aminoacetic acid, 0.035-0.05mol / L H3BO3, (1-2)*10<-3>mol / L stabilizing agent and 3-5g / L micro nano molybdenum disulfide particles; and the PH value of the chemical plating solution is adjusted to 7-8 by KOH and / or NaOH, and the aluminum alloy base material is placed into the solution. The preparation method can perform modification treatment for the aluminum alloy surface, so that the wear resistance, corrosion resistance, conductivity and hardness of the aluminum alloy surface layer are greatly improved.

Description

technical field [0001] The invention relates to a new material, in particular to a method for preparing an electromagnetic shielding layer on the surface of an aluminum alloy. Background technique [0002] Aluminum and aluminum alloys have excellent properties such as light weight, easy processing, and good decoration. However, bare aluminum without protective treatment has poor corrosion resistance and low surface hardness, and a layer of black ash is formed on the surface after wear, so anodic oxidation is usually used for protective treatment of aluminum. Although the conventional anodic oxide anodized film has good protection and wear resistance, it cannot meet the electromagnetic shielding requirements of the product due to its high surface resistance. Traditional metal shielding materials are mostly made of iron, silicon steel sheet, stainless steel, permalloy, etc., which are processed into thin sheets, thin strips and other single materials, and the cost is relative...

Claims

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Application Information

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IPC IPC(8): C23C18/34C23C18/36
Inventor 黄惠张广立
Owner 晋宁理工恒达科技有限公司
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