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Electrodeposit nickel plating solution for deformation zinc alloy and electrodeposit nickel plating method thereof

A technology of electrodeposition and zinc alloy, which is applied in the field of electrodeposition nickel plating solution of deformed zinc alloy, can solve the problems of poor stability of the plating solution, difficulty in maintenance, affecting the performance of the plating layer and subsequent plating types, etc., and achieves long service life and stability Good results

Active Publication Date: 2010-09-01
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current neutral nickel plating process on the surface of zinc alloys is mainly applied to cast zinc alloys formed by die casting. In addition, the composition and process conditions of the neutral nickel plating solution are not suitable for deformed zinc alloys, and there are cracks in the coating, which will It will affect the performance of its own coating and subsequent plating, as well as poor stability of the plating solution and difficult maintenance.

Method used

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  • Electrodeposit nickel plating solution for deformation zinc alloy and electrodeposit nickel plating method thereof
  • Electrodeposit nickel plating solution for deformation zinc alloy and electrodeposit nickel plating method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Each component and content thereof of the electrodeposition nickel-plating solution of a kind of wrought zinc alloy are as follows:

[0052] Nickel sulfate hexahydrate 110g / L;

[0053] Sodium chloride 12g / L;

[0054] Boric acid 30g / L;

[0055] Sodium citrate 80g / L.

[0056] The above components are prepared according to the aforementioned preparation process to prepare an electrodeposition nickel plating solution; use 10mol / L sodium hydroxide solution to adjust the pH value of the electrodeposition nickel plating solution to 6.9; keep the temperature of the electrodeposition nickel plating solution at 30°C ; Immerse the deformed zinc alloy through degreasing in the electro-deposited nickel plating solution, and set the cathode current density as 0.8 ampere / decimeter 2 , Electrodeposited nickel plating. The surface of the obtained coating has no streaks, no cracks observed under a metallographic microscope, no blistering and peeling phenomenon under thermal shock at ...

Embodiment 2

[0058] Each component and content thereof of the electrodeposition nickel-plating solution of a kind of wrought zinc alloy are as follows:

[0059] Nickel sulfate hexahydrate 120g / L;

[0060] Sodium chloride 10g / L;

[0061] Boric acid 30g / L;

[0062] Sodium citrate 120g / L.

[0063] The above components are prepared according to the aforementioned preparation process to prepare an electrodeposition nickel plating solution; use 10mol / L sodium hydroxide solution to adjust the pH value of the electrodeposition nickel plating solution to 6.0; keep the temperature of the electrodeposition nickel plating solution at 25°C ; Immerse the deformed zinc alloy through degreasing in the electrolytic nickel plating solution, and set the cathode current density as 1.0 ampere / decimeter 2 , Electrodeposited nickel plating. The surface of the obtained coating has no streaks, no cracks observed under a metallographic microscope, no blistering and peeling phenomenon under thermal shock at 150°...

Embodiment 3

[0065] Each component and content thereof of the electrodeposition nickel-plating solution of a kind of wrought zinc alloy are as follows:

[0066] Nickel sulfate hexahydrate 130g / L;

[0067] Sodium chloride 15g / L;

[0068] Boric acid 35g / L;

[0069] Sodium citrate 170g / L.

[0070] The above components are prepared according to the aforementioned preparation process for electro-deposition nickel plating solution; use 10mol / L sodium hydroxide solution to adjust the pH value of the electrodeposition nickel-plating solution to 4.8; keep the temperature of the electrodeposition nickel-plating solution at 20°C ; Immerse the deformed zinc alloy through degreasing in the electro-deposited nickel plating solution, and set the cathode current density as 1.5 ampere / decimeter 2 , Electrodeposited nickel plating. The surface of the obtained coating has no streaks, no cracks observed under a metallographic microscope, no blistering and peeling phenomenon under thermal shock at 150° C., a...

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Abstract

The invention discloses electrodeposit nickel plating solution for a deformation zinc alloy and an electrodeposit nickel plating method thereof. The solvent of the electrodeposit nickel plating solution is deionized water, and a solute comprises nickel sulfate hexahydrate (110-130g / L), sodium chloride (10-15g / L), boric acid (30-35g / L) and sodium citrate (80-170g / L). In the electrodeposit nickel plating method, before electrodepositing, the pH value of the electrodeposit nickel plating solution is regulated to 4.8-6.9, the temperature of the electrodeposit nickel plating solution is kept at 20-30 DEG C, and the cathode current density is 0.8-1.5 amperes / dm<2>. The electrodeposit nickel plating solution does not contain prussiates and has the advantages of no pollution and good stability. The cladding surface made by the electrodeposit nickel plating method has no fringes, no cracks when being observed by a metalloscope, and no bubbling or stripping in case of thermal shock at 150 DEG C; and the discolored area on the paste surface does not exceed 10%.

Description

technical field [0001] The invention relates to the field of surface treatment of deformed zinc alloys, in particular to an electrodeposition nickel plating solution and an electrodeposition nickel plating method for deformed zinc alloys. Background technique [0002] Zinc alloy is an alloy composed of zinc as the base and other elements. The main additive elements of zinc alloy are aluminum, copper and magnesium. According to the manufacturing process, zinc alloy can be divided into cast zinc alloy and deformed zinc alloy. Compared with traditional cast zinc alloys, wrought zinc alloys have higher creep strength and low-temperature plasticity, and are mainly used to produce zinc materials of various shapes. , sanitary ware and other industries are widely used. [0003] Generally, surface treatment of zinc alloys can enhance the corrosion resistance and decorative properties of zinc alloys. For wrought zinc alloys, due to the high aluminum content and the high chemical a...

Claims

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Application Information

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IPC IPC(8): C25D3/12
Inventor 宋振纶柯知勤吴浩杰孙文声
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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