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Chemical immersion plating liquid and method for plating tin on surface of high-silicon aluminum alloy

A high-silicon aluminum alloy, chemical immersion plating technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve the problems of dull color and rough surface of tin plating layer

Active Publication Date: 2015-03-25
CHINA HANGFA SOUTH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a chemical immersion plating solution and a method for plating tin on the surface of high-silicon aluminum alloys to solve the problems of dull color and rough surface of the tin-plated layer of high-silicon aluminum alloys in the prior art

Method used

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  • Chemical immersion plating liquid and method for plating tin on surface of high-silicon aluminum alloy
  • Chemical immersion plating liquid and method for plating tin on surface of high-silicon aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment is a piston (high-silicon aluminum alloy material, ZL108, full name ZAlSn2Cu2Mg1) in a motorcycle engine, which contains 11% to 13% of silicon, 1% to 2% of copper, 0.45% to 1% of magnesium, and 0.45% to 1% of magnesium. Manganese 0.3% ~ 0.9%, aluminum is the balance) the surface is coated with a metal tin layer, the purpose of which is to lubricate during the running-in period of the piston to prevent the cylinder from being strained.

[0034] The formula of the chemical immersion plating solution except water is as follows:

[0035] components

Na 2 SnO 3 ·3H 2 o

CH 3 COONa

Acetic acid (based on 60% acetic acid aqueous solution)

content

100g / L

70g / L

2ml / L

[0036] The immersion plating process is as follows:

[0037] Place the piston in the above chemical immersion plating solution for immersion plating, wherein the immersion plating temperature is 65°C, the immersion plating time is 5min, and the f...

Embodiment 2

[0039] This embodiment is a piston (high-silicon aluminum alloy material, ZL108, full name ZAlSn2Cu2Mg1) in a motorcycle engine, which contains 11% to 13% of silicon, 1% to 2% of copper, 0.45% to 1% of magnesium, and 0.45% to 1% of magnesium. Manganese 0.3% ~ 0.9%, aluminum is the balance) the surface is coated with a metal tin layer, the purpose of which is to lubricate during the running-in period of the piston to prevent the cylinder from being strained.

[0040] The formula of the chemical immersion plating solution except water is as follows:

[0041] components

Na 2 SnO 3 ·3H 2 o

CH 3 COONa

Acetic acid (based on 60% acetic acid aqueous solution)

content

170g / L

30g / L

12ml / L

[0042] The immersion plating process is as follows:

[0043] Place the piston in the above chemical immersion plating solution for immersion plating, wherein the immersion plating temperature is 70°C, the immersion plating time is 1min, and the ...

Embodiment 3

[0046] This embodiment is a piston (high-silicon aluminum alloy material, ZL108, full name ZAlSn2Cu2Mg1) in a motorcycle engine, which contains 11% to 13% of silicon, 1% to 2% of copper, 0.45% to 1% of magnesium, and 0.45% to 1% of magnesium. Manganese 0.3% ~ 0.9%, aluminum is the balance) the surface is coated with a metal tin layer, the purpose of which is to lubricate during the running-in period of the piston to prevent the cylinder from being strained.

[0047] The formula of the chemical immersion plating solution except water is as follows:

[0048] components

Na 2 SnO 3 ·3H 2 o

CH 3 COONa

Acetic acid (based on 60% acetic acid aqueous solution)

content

120g / L

60g / L

10ml / L

[0049] The immersion plating process is as follows:

[0050] After degreasing the piston surface with gasoline, wash it with water for 15 seconds; etch the piston surface with a mixture of nitric acid with a density of 1.42g / ml and hydrofluoric ...

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Abstract

The invention discloses chemical immersion plating liquid and a method for plating tin on the surface of high-silicon aluminum alloy. The chemical immersion plating liquid comprises alkali metal stannate, alkali metal acetate, acetic acid and water. The chemical immersion plating liquid contains the acetic acid. The acetic acid is added in the chemical immersion plating liquid, so that effects of preventing dark color and a coarse surface of a tinned layer caused by excessively high content of silicon in the high-silicon aluminum alloy and improving the brightness of the tinned layer can be realized. Meanwhile, after the high-silicon aluminum alloy is immersed in the chemical immersion plating liquid, the metal tin is ensured to substitute aluminum atoms on the surface of the aluminum alloy to form a metallic tin layer by adopting the aluminum atoms in a high-silicon aluminum alloy body as an electron source by directly utilizing the chemical reaction. The binding force between the metallic tin layer formed by the method and the aluminum alloy is relatively good.

Description

technical field [0001] The invention relates to the field of chemical tin plating, in particular to a chemical immersion plating solution and a method for plating tin on the surface of a high-silicon aluminum alloy. Background technique [0002] In recent years, with the global resource consumption increasing year by year, how to slow down the consumption rate of metal products and prolong the service life of metal products has become a hot spot of attention. At present, surface treatment of metal products is a common method to reduce the wear rate of metal products, especially after electroplating on the surface of metal products, it can improve the properties of metal products such as wear resistance and corrosion resistance. Electroplating is actually a process of using the principle of electrolysis, using the plated metal as the anode, and using the workpiece to be plated as the cathode to coat a layer of other metals on the surface of the metal product. For example, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/54
CPCC23C18/54
Inventor 陈青王乐中
Owner CHINA HANGFA SOUTH IND CO LTD