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Combined nickel-plating liquid for electroplating nickel on magnesium alloy and method for electroplating nickel on surface of magnesium alloy

A magnesium alloy and electroplating nickel technology, which is applied in the field of magnesium alloy electroplating nickel, can solve the problems of easy burning of electroplating nickel and difficult electroplating nickel, etc., and achieves strong corrosion resistance, strong matrix bonding force, and the effect of overcoming matrix corrosion

Active Publication Date: 2016-12-21
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In order to solve the problems of electroplating nickel in the prior art that is easy to burn and difficult to obtain electroplating nickel, the invention provides a combined plating solution for electroplating nickel on magnesium alloys

Method used

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  • Combined nickel-plating liquid for electroplating nickel on magnesium alloy and method for electroplating nickel on surface of magnesium alloy
  • Combined nickel-plating liquid for electroplating nickel on magnesium alloy and method for electroplating nickel on surface of magnesium alloy
  • Combined nickel-plating liquid for electroplating nickel on magnesium alloy and method for electroplating nickel on surface of magnesium alloy

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Embodiment Construction

[0095] Below in conjunction with example the present invention will be further described.

[0096] The material is AZ91D magnesium alloy, and the specific implementation steps are as follows:

[0097] 1. Preprocessing part 1

[0098] Step (1): Mechanical polishing Polish the base body sequentially with 240#, 400#, 600#, 800#, 1000#, 1200# sandpaper. Remove the burrs and oxide scales of the samples to reduce the surface roughness, and wash the surface residues with water.

[0099] Step (2): Ultrasonic degreasing, soaking in absolute ethanol, ultrasonic oscillation temperature: room temperature time: 30min.

[0100] Step (3): Alkaline washing

[0101] The solution configuration and operating conditions are as follows: Na 2 CO 3 40g / L Na 3 PO 4 10g / L Na 2 SiO 3 20g / L OP emulsifier 3mL / L Temperature 65℃ Time: 30min.

[0102] Step (4): pickling

[0103] The solution configuration and operating conditions are as follows: H 3 PO 4 242mL / L HNO 3 12mL / L Thiourea 0.25...

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Abstract

The invention discloses combined nickel-plating liquid for electroplating nickel on magnesium alloy. The combined nickel-plating liquid is aqueous solution with the following components of nickel sulfate, water-soluble fluoride, ammonium citrate, sodium saccharin, sodium benzene sulphinate, 1,4-butynediol, lauryl sodium sulfate and a pH regulating agent. In addition, the invention also provides a method for electroplating the nickel on the surface of the magnesium alloy. The method comprises the following steps: mechanically polishing the magnesium alloy, removing oil on the surface of the magnesium alloy, carrying out alkaline washing and acid washing as well as activating treatment, chemically plating zinc for one time or multiple times, and electroplating nickel in the combined nickel-plating liquid to obtain the magnesium alloy with the nickel electroplated on the surface. The combined nickel-plating liquid and the nickel plating method disclosed by the invention are applicable to various magnesium-alloy substrates, and the plated part prepared is higher in bonding force between a matrix thereof and a plated layer, better in corrosion resistance, and flat and attractive in surface.

Description

technical field [0001] The invention relates to the technical field of nickel electroplating on magnesium alloys activated by chromium-free pickling, in particular to a combined plating solution for nickel electroplating on magnesium alloys, and a method for performing nickel plating on the surface of magnesium alloys by using the combined plating solution. Background technique [0002] Magnesium is one of the most abundant light metal elements on the earth, and the specific gravity of magnesium is 1.74g / cm 3 , only 2 / 3 of aluminum and 2 / 5 of titanium; magnesium alloy is 36% lighter than aluminum alloy, 73% lighter than zinc alloy, and 77% lighter than steel. Magnesium has high specific strength and specific stiffness, good thermal and electrical conductivity, good electromagnetic shielding, damping, vibration reduction, machinability and low processing cost, processing energy is only 70% of aluminum alloy and easy to recycle, etc. advantage. The specific strength of magne...

Claims

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Application Information

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IPC IPC(8): C25D3/16C23C18/52C23C18/18C23G1/22C23G1/12C23C28/02
CPCC23C18/1806C23C18/1837C23C18/52C23C28/025C23G1/12C23G1/22C25D3/16
Inventor 林建国房文静张德闯马蓦
Owner XIANGTAN UNIV
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