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Pre-plating treatment agent and pre-plating treatment process

A technology for electroplating pretreatment and treatment process, applied in the field of metal surface treatment, can solve the problems of oxide residue, poor adhesion of electroplating layer, affecting electroplating effect, etc., to ensure environmental protection, avoid strong acid pollution, ensure appearance yield and The effect of electroplating adhesion

Inactive Publication Date: 2018-09-25
YANGZHOU HY TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, common hydrochloric acid, sulfuric acid or nitric acid are usually used to pretreat metal substrates, especially iron substrates, but there will still be some oxide residues on the surface of metal substrates in this way, and the plating layer will have poor adhesion during electroplating. Affect the plating effect

Method used

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  • Pre-plating treatment agent and pre-plating treatment process
  • Pre-plating treatment agent and pre-plating treatment process
  • Pre-plating treatment agent and pre-plating treatment process

Examples

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Effect test

Embodiment 1

[0046] The substrate to be treated in this embodiment is an iron substrate.

[0047] A kind of electroplating pretreatment process, described treatment process comprises the following steps:

[0048] S100: Use the first treatment agent to soak the substrate to be treated; the specific formula of the first treatment agent is to contain 10g of ammonium fluoride, 60g of oxalic acid and 5g of hydrogen peroxide per liter of water; the soaking time is 20S;

[0049] S200: Use the second treatment agent to perform a second soaking treatment on the substrate treated in step S100; the second treatment agent is a dilute hydrochloric acid solution with a mass concentration of 10%; wherein the second treatment agent is treated with 30% dilute hydrochloric acid. configure. The soaking time in step S200 is 20S.

[0050] S300: Perform cleaning treatment on the base material after the treatment in step S200.

[0051] The substrate processed in step S300 of this embodiment can be subjected t...

Embodiment 2

[0054] The substrate to be treated in this embodiment is an iron substrate.

[0055] A kind of electroplating pretreatment process, described treatment process comprises the following steps:

[0056] S001: Soak the substrate to be treated in an aqueous sodium hydroxide solution with a mass concentration of 30 g / L for 10 seconds;

[0057] S002: cleaning the substrate after step S001 to remove the sodium hydroxide solution on the surface of the substrate;

[0058] S100: Use the first treatment agent to soak the substrate treated in step S002; wherein the specific formula of the first treatment agent contains 20g of ammonium fluoride, 40g of oxalic acid and 20.26g of hydrogen peroxide per liter of water; the soaking time is 30S ;

[0059] S200: Use the second treatment agent to soak the substrate treated in step S100 for a second time; the second treatment agent is a dilute hydrochloric acid solution with a mass concentration of 7%; wherein the second treatment agent is treated...

Embodiment 3

[0091] The substrate to be treated in this embodiment is an iron substrate.

[0092] A kind of electroplating pretreatment process, described treatment process comprises the following steps:

[0093] S001: Soak the base material to be treated with an aqueous solution of sodium hydroxide having a mass concentration of 40 g / L, and the soaking time is 10 seconds;

[0094] S002: cleaning the substrate after step S001 to remove the sodium hydroxide solution on the surface of the substrate;

[0095] S100: Use the first treatment agent to soak the substrate treated in step S002; wherein the specific formula of the first treatment agent contains 40g of ammonium fluoride, 20g of oxalic acid and 30g of hydrogen peroxide per liter of water; the soaking time is 40S;

[0096] S200: Use the second treatment agent to perform a second soaking treatment on the substrate treated in step S100; the second treatment agent is a dilute hydrochloric acid solution with a mass concentration of 15%; wh...

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Abstract

The invention provides a pre-plating treatment agent, which is prepared from a first treatment agent and a second treatment agent; the first treatment agent and the second treatment agent are separately used; the first treatment agent is prepared from ammonium fluoride, oxalic acid and hydrogen peroxide, and the ratio of the parts by weight of ammonium fluoride to oxalic acid to hydrogen peroxideis (10 to 40) to (20 to 60) to (5 to 30); and the second treatment agent is diluted hydrochloric acid, the pH of which is 3 to 5. The invention further provides a pre-plating treatment process. The pre-plating treatment agent disclosed by the invention is prepared from the first treatment agent for removing oxide and organic pollutants and the second treatment agent for removing trivalent iron ions; the two types of agents can sequentially remove greasy dirt, oxide, organic pollutants and trivalent iron ions on the surface of a metal base material, consequently, oxide and other pollutants on the surface of the metal base material can be effectively and thoroughly removed, a good foundation is laid for the subsequent plating process for the metal base material, and good appearance and plating layer adhesion are ensured.

Description

technical field [0001] The invention relates to the field of metal surface treatment, in particular to a treatment agent and a treatment process before metal electroplating. Background technique [0002] Metal substrates play a pivotal role in almost all national economic sectors, but the poor corrosion resistance of metal substrates, especially iron substrates, seriously restricts the wide application of steel materials, so proper surface treatment must be carried out. Surface treatment is very important to improve the corrosion resistance of metal substrates, expand the application field, and improve its various properties. The most common treatment method for metal substrates, especially iron substrates, is electroplating. [0003] Electroplating is the process of plating a layer of other metals or alloys on the metal surface by using the principle of electrolysis. It is a process of attaching a layer of metal film to the surface of metal parts by electrolysis, so as to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/34C25D5/36C23G1/10C23G1/08C23G1/19C23G1/20
CPCC23G1/08C23G1/088C23G1/103C23G1/19C23G1/20C25D5/34C25D5/36
Inventor 薛明峰
Owner YANGZHOU HY TECH DEV
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