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Composition solution for electric nickel-plating on surface of magnesium alloy

A technology of electroplating nickel and magnesium alloys, applied in the field of electroplating, can solve problems such as complex process, poor repeatability, and environmental pollution, and achieve the effects of high corrosion resistance, beautiful appearance, and high bonding force

Inactive Publication Date: 2014-07-02
无锡市锡山区鹅湖镇荡口青荡金属制品厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process is complicated, the repeatability is poor, cyanide is used, the plating solution is poisonous, pollutes the environment, the brightness of the coating and the stability of the plating solution need to be further improved
[0004] In order to overcome the shortcoming of complex process, researchers have developed a direct electroless nickel plating method, such as JP2003073843, which uses chromic anhydride to etch magnesium alloys, performs electroless nickel plating after fluoride activation, and adjusts the electroless nickel plating solution with ammonia water to make it appear Weakly alkaline, once obtained the chemical nickel plating layer with good bonding force and high corrosion resistance, Li Degao et al. used deflocculation → chemical degreasinglight emissionneutralization → activation → pre-treatment in the patent CN1699634A magnesium alloy electroplating method The galvanizing process has obtained a relatively good pre-galvanized layer, and the pre-galvanized solution is cyanide-free, non-toxic and harmless. In the patent CN1737205A, people such as Yang Sheng pickled the magnesium alloy with concentrated hydrofluoric acid (11%) Afterwards, directly electroplate aluminum to obtain a relatively good aluminum coating. Chinese patent CN1641075A has described in detail the surface or activation treatment methods and surface plating methods of magnesium and magnesium alloys. Although these processes are all separated from cyanide electroplating, the treatment before electroplating The process is mostly based on the improvement of the DOW process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A combined solution for electroplating nickel on the surface of magnesium alloy. The combined solution includes a zinc immersion bath, an electrogalvanizing bath and an electroplating nickel bath. The composition of the zinc immersion bath is 32 g / L zinc sulfate, 210 g / L potassium pyrophosphate, and carbonic acid. Sodium 8g / L, potassium fluoride 5g / L; ammonium bifluoride 2g / L, the balance is water; the composition of the electrogalvanizing bath: ZnSO 4 ·7H 2 O32g / L, K 4 P 2 O 7 ·3H 2 O168g / L, KF18g / L, C 6 H 17 O 7 N 3 32g / L, phytic acid 0.6g / L, H 2 CSNH 2 :4g / L, the balance is water; the composition of the nickel electroplating bath is: nickel sulfate 250g / L, nickel chloride 35g / L, boric acid 52g / L, potassium sulfate 26g / L, sodium lauryl sulfonate 0.5g / L, anhydrous sodium acetate 40g / L, ethoxylated butynediol 30mg / L, propionic acid 4g / L, the balance is water.

Embodiment 2

[0014] A combined solution for electroplating nickel on the surface of magnesium alloy. The combined solution includes a zinc dipping solution, an electro-galvanizing solution and an electro-nickel plating solution. The composition of the zinc dipping solution is 36 g / L zinc sulfate, 200 g / L potassium pyrophosphate, and carbonic acid. Sodium 10g / L, potassium fluoride 3g / L; ammonium bifluoride 3g / L, the balance is water; the composition of the electro-galvanizing bath: ZnSO 4 ·7H 2 O36g / L, K 4 P 2 O 7 ·3H 2 O164g / L, KF20g / L, C 6 H 17 O 7 N 3 32g / L, phytic acid 0.6g / L, H 2 CSNH 2 :4g / L, the balance is water; the composition of the electroplating nickel plating solution is: nickel sulfate 270g / L, nickel chloride 25g / L, boric acid 56g / L, potassium sulfate 20g / L, sodium lauryl sulfonate 1.5g / L, anhydrous sodium acetate 36g / L, ethoxylated butynediol 40mg / L, propionic acid 3g / L, the balance is water.

Embodiment 3

[0016] A combined solution for electroplating nickel on the surface of magnesium alloy. The combined solution includes a zinc dipping solution, an electro-galvanizing solution and an electro-nickel plating solution. The zinc dipping solution consists of 34 g / L zinc sulfate, 205 g / L potassium pyrophosphate, and carbonic acid. Sodium 9g / L, potassium fluoride 4g / L; ammonium bifluoride 2.5g / L, the balance is water; the composition of the electrogalvanizing bath: ZnSO 4 ·7H 2 O34g / L, K 4 P 2 O 7 ·3H 2 O166g / L, KF19g / L, C 6 H 17 O 7 N 3 33g / L, phytic acid 0.5g / L, H 2 CSNH 2 :5g / L, the balance is water; the composition of the nickel electroplating bath is: nickel sulfate 260g / L, nickel chloride 30g / L, boric acid 54g / L, potassium sulfate 23g / L, sodium lauryl sulfonate 1.0g / L, anhydrous sodium acetate 38g / L, ethoxylated butynediol 35mg / L, propionic acid 3.5g / L, the balance is water.

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PUM

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Abstract

The invention discloses a composition solution for electric nickel-plating on the surface of a magnesium alloy. The composition solution comprises a zinc immersion liquid, an electric zinc plating liquid and a nickel-electroplating liquid. By adjusting the components of the zinc immersion liquid, the zinc electroplating liquid and the nickel electroplating liquid, a plating process is environmental friendly and safe, and a prepared plated layer is high in corrosion resistance, attractive in appearance and high in binding force with a substrate.

Description

Technical field [0001] The invention relates to the field of electroplating technology, and in particular to a combined solution for electroplating nickel on the surface of a magnesium alloy. Background technique [0002] As a kind of lightweight engineering structural material, magnesium alloy has high specific strength, high specific stiffness and superior shock absorption performance, and has a wide range of applications in the fields of transportation, communications, aviation, and aerospace. However, magnesium alloy has high chemical activity, low electrode potential, and loose surface oxide film, resulting in low protection performance, which restricts the application and development of magnesium alloy. This has aroused people's attention to the corrosion and protection of magnesium alloy parts. A lot of research has been carried out in the areas of magnesium alloy surface anodic oxidation, chemical conversion film, organic coating, surface plating, etc., especially the use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/16C25D3/22C23C2/06
Inventor 钱永清
Owner 无锡市锡山区鹅湖镇荡口青荡金属制品厂
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