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Chemical nickel plating solution with high corrosion resistance and stability on surface of aluminum alloy and preparation method and application thereof

A technology of aluminum alloy surface and electroless nickel plating solution, which is applied in the direction of liquid chemical plating, metal material coating process, coating, etc., can solve the problems of complex pretreatment process, poor stability of plating solution, high porosity of plating layer, etc., and achieve Increase the stability of the plating solution, high corrosion resistance of the coating, and good stability of the plating solution

Active Publication Date: 2020-04-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, electroless nickel plating on the surface of aluminum alloys has disadvantages such as complex pretreatment process, poor stability of plating solution, high porosity of the plating layer resulting in poor corrosion resistance, and the need for organic sealing agent treatment after plating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The electroless nickel plating solution of the present invention is composed of deionized water, main salt, reducing agent, complexing agent, buffering agent, stabilizer and brightener. The main salt is nickel sulfate (NiSO 4 ·6H 2 O) content 25g / L; reducing agent is sodium hypophosphite (NaH 2 PO 2 ·H 2 O) content 27g / L; Complexing agent is made up of glycine and lactic acid, and wherein glycine 10g / L, lactic acid 5ml / L; Buffering agent is made of sodium tetraborate (Na 2 B 4 o 7 10H 2 O) and succinic acid, wherein sodium tetraborate 1.0g / L, succinic acid 18g / L; stabilizer consists of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) and potassium iodide, wherein potassium iodide 5mg / L, cobalt nitrate 10mg / L; brightener is polyethylene glycol, content 0.1g / L. The pH value of the electroless nickel plating solution is 4.8, the plating temperature is 80°C, and the plating time is 3h.

[0032]The steps of preparing the electroless nickel plating solution are as follows: add...

Embodiment 2

[0035] The electroless nickel plating solution of the present invention is composed of deionized water, main salt, reducing agent, complexing agent, buffering agent, stabilizer and brightener. The main salt is nickel sulfate (NiSO 4 ·6H 2 O) content 30g / L; reducing agent is sodium hypophosphite (NaH 2 PO 2 ·H 2 O) content 32g / L; Complexing agent is made up of glycine and lactic acid, and wherein glycine 6g / L, lactic acid 10ml / L; Buffering agent is made of sodium tetraborate (Na 2 B 4 o 7 10H 2 O) and succinic acid, wherein sodium tetraborate 2.0g / L, succinic acid 15g / L; stabilizer consists of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) and potassium iodide, wherein potassium iodide 15mg / L, cobalt nitrate 5mg / L; brightener is polyethylene glycol, content 0.2g / L. The pH value of the electroless nickel plating solution is 5.2, the plating temperature is 85°C, and the plating time is 1h.

[0036] The steps of preparing the electroless nickel plating solution are as follows: ad...

Embodiment 3

[0039] The electroless nickel plating solution of the present invention is composed of deionized water, main salt, reducing agent, complexing agent, buffering agent, stabilizer and brightener. The main salt is nickel sulfate (NiSO 4 ·6H 2 O) content 28g / L; reducing agent is sodium hypophosphite (NaH 2 PO 2 ·H 2 O) content 30g / L; Complexing agent is made up of glycine and lactic acid, wherein glycine 8g / L, lactic acid 7.5ml / L; Buffering agent is made of sodium tetraborate (Na 2 B 4 o 7 10H 2 O) and succinic acid, wherein sodium tetraborate 1.5g / L, succinic acid 12g / L; stabilizer is made of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) and potassium iodide, wherein potassium iodide 10mg / L, cobalt nitrate 7.5mg / L; brightener is polyethylene glycol, content 0.15g / L. The pH value of the electroless nickel plating solution is 5, the plating temperature is 83°C, and the plating time is 2h.

[0040] The steps of preparing the electroless nickel plating solution are as follows: addin...

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PUM

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Abstract

The invention discloses a chemical nickel plating solution with high corrosion resistance and stability on the surface of an aluminum alloy and a preparation method and application of the chemical nickel plating solution. The chemical nickel plating solution is composed of deionized water, main salt, a reducing agent, a complexing agent, a buffering agent, a stabilizer and a brightener. The main salt is nickel sulfate, the reducing agent is sodium hypophosphite, the complexing agent is composed of glycine and lactic acid, the buffering agent is composed of sodium tetraborate and succinic acid,the stabilizer is composed of cobalt nitrate and potassium iodide, and the brightener is polyethylene glycol. An environmental-friendly chemical nickel plating system with high corrosion resistance and high stability and a simple and efficient pretreatment process are developed, so that the process flow is simplified, the production cost is reduced, and the corrosion resistance of the aluminum alloy is greatly improved.

Description

technical field [0001] The invention relates to the field of material corrosion and protection, in particular to an electroless nickel plating solution with high corrosion resistance and stability on the surface of an aluminum alloy, a preparation method and application thereof. Background technique [0002] Aluminum and its alloys have low density, high specific strength, and good electrical and thermal conductivity, and are widely used in aerospace, transportation, electronic 3C and other fields. However, the poor corrosion resistance of aluminum alloys, prone to pitting corrosion and intergranular corrosion seriously restrict its application and development. Electroless nickel plating on the surface of aluminum alloy can effectively improve its corrosion resistance. At present, the pretreatment process of electroless nickel plating on the surface of aluminum alloy includes "secondary zinc immersion method", "pre-nickel plating method", "secondary nickel immersion method"...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/36C23C18/18
CPCC23C18/1844C23C18/36
Inventor 周根树刘冰洋曹雅心邱倩
Owner XI AN JIAOTONG UNIV
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