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A kind of beryllium material electroless nickel plating pretreatment method

A technology for electroless nickel and beryllium plating, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve problems such as difficulty in obtaining a film layer, and achieve the advantages of short galvanizing time, pollution reduction and remarkable effect. Effect

Active Publication Date: 2016-03-02
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when performing electroless nickel plating on beryllium parts containing a beryllium oxide film, in addition to the conventional process, one or more pretreatment processes must be added to ensure that the oxide film is removed and no longer formed before the electroless nickel plating, otherwise it will be Difficulty obtaining well-bonded layers

Method used

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  • A kind of beryllium material electroless nickel plating pretreatment method
  • A kind of beryllium material electroless nickel plating pretreatment method
  • A kind of beryllium material electroless nickel plating pretreatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Wipe the beryllium parts with acetone, then dry the surface with a hair dryer at a temperature of 55 ° C, and then immerse the beryllium parts in 50% alcohol solution for ultrasonic cleaning for 15 minutes. The working power of the ultrasonic cleaning machine is 25KHz. Rinse the beryllium parts after ultrasonic cleaning with deionized water, and then carry out anodic pickling to remove oil. The oil removal solution is 500mL / L sulfuric acid solution, the solution temperature is 25°C, and the applied current density is 4A / dm 2 , anodic pickling degreasing time 2min. The beryllium parts after anodic pickling and degreasing are rinsed with deionized water again, and then the beryllium parts are immersed in 30% nitric acid solution for etching for 20s, and the temperature of the etching solution is 60°C. Rinse the etched beryllium parts with deionized water, and then immerse in a zinc immersion solution prepared by dissolving 20g of zinc sulfate, 5g of ferric chloride and 20...

Embodiment 2

[0031] Change the ultrasonic cleaning time of the alcohol solution in Example 1 to 20min, the working power of the ultrasonic cleaner to 40KHz, and the rest of the conditions are the same as in Example 1.

[0032] The electroless nickel plating layer obtained by this method is uniform and continuous, and has a compact surface. With reference to the standard "QJ479-90 Test Method for Bonding Strength of Metal Plating Layers", the thermal shock method is used for testing. Heat the part to 220°C and keep it warm for 30 minutes. After taking it out, put it into cold water immediately. The chemical nickel plating layer has no peeling or peeling phenomenon, and the bonding strength is good.

Embodiment 3

[0034] Change the etching time in the nitric acid solution of Example 2 to 30 s, and the temperature of the etching solution to 50° C., and the other conditions are the same as in Example 2.

[0035] The electroless nickel plating layer obtained by this method is uniform and continuous, and has a compact surface. With reference to the standard "QJ479-90 Test Method for Bonding Strength of Metal Plating Layers", the thermal shock method is used for testing. Heat the part to 220°C and keep it warm for 30 minutes. After taking it out, put it into cold water immediately. The chemical nickel plating layer has no peeling or peeling phenomenon, and the bonding strength is good.

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Abstract

The invention relates to a chemical nickel-plating pretreatment method for a beryllium product, and belongs to the technical field of surface treatment of the beryllium product. The method comprises the following steps: 1) wiping the surface of the machined beryllium product by using an organic solvent; 2) blowing the beryllium product wiped by the organic solvent in the step 1) by using a blower to dry the organic solvent on the surface; 3) carrying out ultrasonic cleaning on the beryllium product obtained in the step 2) by using an alcoholic liquid; 4) carrying out anodic pickling to remove oil; 5) etching by a nitric acid; 6) carrying out zinc immersion treatment; and 7) carrying out chemical nickel-plating treatment on the beryllium product part subjected to zinc immersion treatment on the surface. The method disclosed by the invention is simple and feasible in process, small in pollution, simple to operate, and applicable to large-scale nickel-plating production of the beryllium product part.

Description

technical field [0001] The invention relates to a pretreatment method for beryllium material electroless nickel plating, which belongs to the technical field of beryllium material surface treatment. Background technique [0002] The success or failure of electroless nickel plating on beryllium materials largely depends on pre-plating pretreatment, because it directly affects the bonding strength between the coating and the substrate, which is also the biggest problem encountered in electroless nickel plating on beryllium materials. [0003] First of all, after the beryllium parts are machined, various dirt will remain on the surface of the parts, such as dust, turning fluid, oil stains, etc. A clean and lively beryllium substrate surface is also a prerequisite for ensuring uniform, continuous, and good bonding of the electroless nickel plating layer. [0004] Secondly, beryllium material is a material prepared by hot isostatic pressing of powder metallurgy. It is a porous m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/18
Inventor 朱志刚王长青王长峰崔砚薛凤举班建钢钟声黄德董国君刘昀
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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