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Nickel base alloy pre-planting electroplating method for aluminum or aluminum alloy

A technology of aluminum alloy and base alloy, which is applied in the field of surface treatment of metal materials, can solve problems such as poor coating adhesion, poor corrosion resistance, and environmental pollution, and achieve the effects of prolonging service life, good bonding, and simplifying the process

Inactive Publication Date: 2013-02-20
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of discrete particles with catalytic activity directly deposited on the surface of the aluminum or aluminum alloy substrate after being treated with the pre-planting solution at room temperature. These pre-planted catalytically active particles are induced in the electroplating solution. Electrodeposition of nickel-based alloy coatings with good bonding properties to the substrate solves the problems of complex processes, environmental pollution, energy consumption, poor corrosion resistance and poor coating adhesion in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Process pure aluminum according to the following steps:

[0029] 1) Rinse and degrease the aluminum with distilled water at room temperature;

[0030] 2) After cleaning and degreasing, place the aluminum in an acid etching solution consisting of 18% nitric acid by volume, 1% HF (hydrofluoric acid) and deionized water, and the acid etching time is 60s at room temperature ;

[0031] 3) Rinse with distilled water at room temperature after acid etching;

[0032] 4) After rinsing, place the aluminum in the pre-planting solution containing nickel chloride at a concentration of 15g / L and sodium acetate at a concentration of 80g / L for pre-planting treatment. The pH value of the pre-planting solution is 9 and the ambient temperature is 25°C , the pre-planting time is 60s;

[0033] 5) After the pre-planting treatment, place the aluminum in the electroplating solution and electroplate the Ni-P alloy;

[0034] 6) Stop electroplating, wash and dry the sample.

Embodiment 2

[0036] The LY12 aluminum alloy is processed according to the following steps:

[0037] 1) Rinse and degrease the aluminum alloy with distilled water at room temperature;

[0038] 2) After cleaning and degreasing, place the aluminum alloy in an acid etching solution consisting of 30% nitric acid by volume, 0.5% HF (hydrofluoric acid) and deionized water. The etching time at room temperature is 35s;

[0039] 3) Rinse with distilled water at room temperature after acid etching;

[0040] 4) After rinsing, place the aluminum alloy in the pre-planting solution containing nickel nitrate at a concentration of 11g / L and lactic acid at a concentration of 70g / L for pre-planting treatment. The pH value of the pre-planting solution is 13.5, and the ambient temperature is 30°C. The pre-planting time is 15s;

[0041] 5) After the pre-planting treatment, the aluminum alloy is placed in the electroplating solution to electroplate Ni-W alloy;

[0042] 6) Stop electroplating, wash and dry th...

Embodiment 3

[0044] The 6063 aluminum alloy is processed according to the following steps:

[0045] 1) Rinse and degrease the aluminum alloy with distilled water at room temperature;

[0046] 2) After cleaning and degreasing, place the aluminum alloy in an acid etching solution consisting of 50% nitric acid by volume, 0.5% HF (hydrofluoric acid) and deionized water. The etching time at room temperature is 15s;

[0047] 3) Rinse with distilled water at room temperature after acid etching;

[0048] 4) After rinsing, place the aluminum alloy in a pre-planting solution containing 35g / L nickel carbonate, 65g / L sodium citrate and 15g / L boric acid for pre-planting treatment. The pH value of the pre-planting solution is 13.0, the ambient temperature is 20°C, and the pre-planting time is 25s;

[0049] 5) After the pre-planting treatment, the aluminum alloy is placed in the electroplating solution to electroplate the Ni-Co alloy;

[0050] 6) Stop electroplating, wash and dry the sample.

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Abstract

The present invention discloses a nickel base alloy pre-planting electroplating method for aluminum or an aluminum alloy, wherein the method comprises surface degreasing, water washing, etching, water washing, a pre-planting treatment, electroplating and other steps. According to the method, zinc dipping and other pre-treatment methods are not required, and the material is only subjected to a pre-planting treatment and directly placed into an electroplating solution to electroplate to obtain the nickel base alloy plating layer having a good combination performance with a substrate; the traditional process for nickel base alloy electroplating for the aluminum or the aluminum alloy is simplified, the obtained nickel base alloy plating layer is uniform and compact, and has a good combination performance with aluminum or an aluminum alloy substrate; and the method has characteristics of simple operation, reduced cost and high yield, and has a good application prospect.

Description

technical field [0001] The invention relates to a metal material surface treatment technology, in particular to a method for pre-planting and electroplating nickel-based alloys on aluminum or aluminum alloys. Background technique [0002] Electroplating or electrodeposition refers to the process of reducing metal ions in solution to metal atoms by providing electrons from an external power source. Electroplating metals and alloys can impart surface brightness, magnetic properties, wear resistance and corrosion resistance to the base metal material as a surface treatment method. Electroplating nickel-based alloy coatings have excellent surface finish, magnetic properties, corrosion resistance, With the characteristics of high wear resistance and hardness, it has been widely used in aviation, aerospace, electronics industry, petrochemical industry, precision instrument, machinery, textile and automobile and other industries. [0003] Aluminum and aluminum alloys are character...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/44C25D3/56
Inventor 郑辉庭胡永俊李昔强甄余炳成晓玲胡光辉李风何志泉陈建明刘瑞强陈铁文庞建业梁振标林涌黄晓争徐志隆钟彬强何健楠骆志捷黄春檑何远川刘毅然
Owner GUANGDONG UNIV OF TECH