Process for pretreating part to be plated in electroplating process

A technology for pretreatment and plating, applied in the field of pretreatment of plated parts, can solve problems such as peeling off of the coating and unguaranteed quality, and achieve the effects of good wettability, good cleanliness, and long service time.

Inactive Publication Date: 2016-05-18
苏州市华婷特种电镀有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the first step of the electroplating process is to treat the electroplated parts, but the existi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0010] Embodiment one:

[0011] The invention provides a pretreatment process of a piece to be plated in the electroplating process, comprising the steps of: degreasing and etching the piece to be plated. The chemical degreasing liquid used in the degreasing process includes sodium hydroxide, trisodium phosphate dodecahydrate, sodium carbonate and sodium metasilicate. The composition of the chemical degreasing liquid is: sodium hydroxide 50g / L, trisodium phosphate dodecahydrate 10g / L, sodium carbonate 40g / L, sodium metasilicate 5g / L. The temperature of the chemical degreasing liquid in the degreasing process is 80°C.

[0012] The chemical etching solution used in the etching process includes sulfuric acid, rhodin and sodium chloride with a mass fraction of 98%. The components of the chemical etching solution are: sulfuric acid 170g / L, rhodin 0.8g / L, sodium chloride 80g / L. The temperature of the chemical etching solution in the etching process is 50°C.

Example Embodiment

[0013] Embodiment two:

[0014] The invention provides a pretreatment process of a piece to be plated in the electroplating process, comprising the steps of: degreasing and etching the piece to be plated. The chemical degreasing liquid used in the degreasing process includes sodium hydroxide, trisodium phosphate dodecahydrate, sodium carbonate and sodium metasilicate. The composition of the chemical degreasing liquid is: 60 g / L of sodium hydroxide, 15 g / L of trisodium phosphate dodecahydrate, 30 g / L of sodium carbonate, and 1 g / L of sodium metasilicate. The temperature of the chemical degreasing liquid in the degreasing process is 75°C.

[0015] The chemical etching solution used in the etching process includes sulfuric acid, rhodin and sodium chloride with a mass fraction of 98%. The components of the chemical etching solution are: sulfuric acid 150g / L, rhodin 0.9g / L, sodium chloride 100g / L. The temperature of the chemical etching solution in the etching process is 45°C. ...

Example Embodiment

[0016] Embodiment three:

[0017] The invention provides a pretreatment process of a piece to be plated in the electroplating process, comprising the steps of: degreasing and etching the piece to be plated. The chemical degreasing liquid used in the degreasing process includes sodium hydroxide, trisodium phosphate dodecahydrate, sodium carbonate and sodium metasilicate. The composition of the chemical degreasing liquid is: sodium hydroxide 55g / L, trisodium phosphate dodecahydrate 13g / L, sodium carbonate 36g / L, sodium metasilicate 3g / L. The temperature of the chemical degreasing liquid in the degreasing process is 78°C.

[0018] The chemical etching solution used in the etching process includes sulfuric acid, rhodin and sodium chloride with a mass fraction of 98%. The components of the chemical etching solution are: sulfuric acid 200g / L, rhodin 0.6g / L, sodium chloride 50g / L. The temperature of the chemical etching solution in the etching process is 55°C.

[0019] The benefi...

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PUM

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Abstract

The invention discloses a process for pretreating a part to be plated in the electroplating process. The process comprises the steps that degreasing and etching procedures are carried out on the part to be plated, a chemical degreasing solution adopted in the degreasing procedure is prepared from sodium hydroxide, sodium phosphate tribasic dodecahydrate, sodium carbonate and sodium metasilicate, and a chemical etching solution adopted in the etching procedure is prepared from 150 g/L to 200 g/ of 98% sulfuric acid, 0.6 g/L to 0.9/L of rodine and 50 g/L to 100 g/L of sodium chloride. In this manner, according to the process, grease and a passive film on the surface of the plated part can be removed, so that the surface of the plated part and a plating solution have good wetability, the surface of the plated part which is not electroplated is very good in state and high in clean degree, the obtained plated part is long in service time, and the plating peeling off phenomenon is avoided.

Description

technical field [0001] The invention relates to the field of electroplating products and processes, in particular to a pretreatment process for a piece to be plated during the electroplating process. Background technique [0002] Electroplating is to deposit a layer of metal coating on the surface of plated parts through chemical displacement reaction or electrochemical reaction, and form an oxide film on the surface of metal products through oxidation reaction, thereby changing the performance state of the surface of plated parts or metal products to meet User requirements for product performance. Generally, the first step of the electroplating process is to treat the electroplated parts, but the existing treated electroplated parts tend to peel off after electroplating, and the quality cannot be guaranteed. Contents of the invention [0003] The technical problem mainly solved by the present invention is to provide a pretreatment process for the parts to be plated durin...

Claims

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Application Information

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IPC IPC(8): C25D5/34C23G1/14C23F1/16
CPCC25D5/34C23F1/16C23G1/14
Inventor 陆文华
Owner 苏州市华婷特种电镀有限公司
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