Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for pretreatment in electroplating process

A pretreatment, electrochemical technology, applied in the field of pretreatment in the electroplating process, can solve the problem of long use time, and achieve the effect of long service life and easy electroplating reaction

Inactive Publication Date: 2016-05-11
苏州市华婷特种电镀有限公司
View PDF10 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention is to provide a method for pretreatment in the electroplating process, so that the plated parts can be used for a long time after electroplating

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Provided is a method for pretreatment in the electroplating process, comprising the steps of: degreasing and etching processes for the parts to be plated. The electrochemical degreasing liquid used in the degreasing process includes sodium hydroxide and sodium metasilicate. The components of the electrochemical degreasing liquid are: sodium hydroxide 5g / L, sodium metasilicate 55g / L. The time of the degreasing process is 4 minutes.

[0012] The bright etching solution used in the etching process includes sulfuric acid with a mass fraction of 98%, concentrated nitric acid and hydrochloric acid with a mass fraction of 37%. The components of the bright etching solution are: sulfuric acid 720g / L, concentrated nitric acid 500g / L, hydrochloric acid 5g / L. The etching time in the etching step is 8 minutes.

Embodiment 2

[0014] Provided is a method for pretreatment in the electroplating process, comprising the steps of: degreasing and etching processes for the parts to be plated. The electrochemical degreasing liquid used in the degreasing process includes sodium hydroxide and sodium metasilicate. The components of the electrochemical degreasing liquid are: sodium hydroxide 15g / L, sodium metasilicate 40g / L. The time of the degreasing process is 2 minutes.

[0015] The bright etching solution used in the etching process includes sulfuric acid with a mass fraction of 98%, concentrated nitric acid and hydrochloric acid with a mass fraction of 37%. The components of the bright etching solution are: sulfuric acid 700g / L, concentrated nitric acid 550g / L, hydrochloric acid 3g / L. The time for etching in the etching step is 13 minutes.

Embodiment 3

[0017] Provided is a method for pretreatment in the electroplating process, comprising the steps of: degreasing and etching processes for the parts to be plated. The electrochemical degreasing liquid used in the degreasing process includes sodium hydroxide and sodium metasilicate. The components of the electrochemical degreasing liquid are: sodium hydroxide 10g / L, sodium metasilicate 50g / L. The time of the degreasing process is 3 minutes.

[0018] The bright etching solution used in the etching process includes sulfuric acid with a mass fraction of 98%, concentrated nitric acid and hydrochloric acid with a mass fraction of 37%. The components of the bright etching solution are: sulfuric acid 750g / L, concentrated nitric acid 450g / L, hydrochloric acid 8g / L. The etching time in the etching step is 5 minutes.

[0019] The beneficial effects of the present invention are:

[0020] 1. This method can degrease the surface of the plated parts, remove scale and passivation film, and...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for pretreatment in an electroplating process. The method includes the steps that a part to be plated is subjected to oil removing and etching procedures, electrochemical oil removing liquid adopted in the oil removing procedure comprises 5-15g / L of sodium hydroxide and 40-55 g / L of sodium metasilicate, and polishing etching liquid adopted in the etching procedure comprises 98% by mass of sulfuric acid, concentrated nitric acid and 37% by mass of hydrochloric acid. In this way, the method can be used for conducting oil removing treatment, oxide skin removing and passive film removing on the surface of the plated part, the surface of the plated part is activated, the pretreated plated part is provided with the smooth and bright surface, an electroplating reaction is performed more easily, the obtained plated part is long in service life, and the phenomena of blistering and mottling of a plating layer cannot occur.

Description

technical field [0001] The invention relates to the field of electroplating products and techniques, in particular to a method for pretreatment in the electroplating process. Background technique [0002] Electroplating is a metal coating process that electrochemically deposits a desired shape on the surface of a plated part. Metal electrodeposition refers to the process of reducing metal ions in the electrolyte under the action of direct current and depositing them on the surface of parts to form a metal coating with qualitative properties. Generally, the electroplating process will firstly treat the electroplated parts, but the existing treated electroplated parts are prone to blistering and mottled phenomenon 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 method for pretreatment in the electroplating process, so that the plated parts can be used ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/34
CPCC25D5/34
Inventor 陆文华
Owner 苏州市华婷特种电镀有限公司