Tin plating method for metal surface

A metal surface, tin-plating technology, applied in metal material coating process, liquid chemical plating, coating and other directions, can solve the problems of coating scratches and damage, inconvenient modulation, low efficiency, etc., to achieve smooth light quantity and uniform film , the effect of good electrical conductivity

Inactive Publication Date: 2020-01-31
BEIJING SHUGUANG AERO ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, during the installation process of some tin-plated parts, it is found that the coating on the outer surface is scratched and damaged, and local repairs are required. However, the current formulation of the repair solution for local damage to the tin-plated film is complex and inconvenient to prepare, and the repair method is costly and inefficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Shell material T2, after the overall tin plating, the tin plating film on the surface of the inner cavity is removed by machine addition (forming a non-coating part), and the non-film part is chemically tinned.

[0029] The solute of repair liquid is tin sulfate, thiourea and sodium chloride, and the solvent of described repair liquid is water; The mass of tin sulfate and the volume ratio of water are 35:1, and the unit is gram / liter; The quality of thiourea and water The volume ratio of sodium chloride is 40:1, and the unit is g / L; the volume ratio of the mass of sodium chloride to water is 2:1, and the unit is g / L.

[0030] The time for the tin-free part to react with the repair solution is 40 seconds.

[0031] The contact of the tin-free part with the repair solution is carried out by coating.

[0032] The heating temperature for the reaction between the non-tin-plated part and the repair solution is 30° C., and the reaction time is 40 seconds.

Embodiment 2

[0034] For end cap material T2, after the overall tinning, the tin coating on the surface of the mouth of the inner cavity is removed by machine addition (forming a non-coating part), and the non-coating part is chemically tinned.

[0035] The solute of repair liquid is tin sulfate, thiourea and sodium chloride, and the solvent of described repair liquid is water; The mass of tin sulfate and the volume ratio of water are 38:1, and the unit is gram / liter; The quality of thiourea and water The volume ratio of sodium chloride is 45:1, and the unit is g / L; the volume ratio of the mass of sodium chloride to water is 4:1, and the unit is g / L.

[0036] The time for the tin-free part to react with the repair solution is 35 seconds.

[0037] The contact of the tin-free part with the repair solution is carried out by coating.

[0038] The heating temperature of the tin-free part reacting with the repair solution is 35° C., and the reaction time is 35 seconds.

Embodiment 3

[0040] For the lug material T2, after the overall tin plating, the tin plating film on the surface of the contact point is removed by machine addition (forming a non-coating part), and the non-film part is chemically tinned.

[0041] The solute of repair liquid is tin sulfate, thiourea and sodium chloride, and the solvent of described repair liquid is water; The mass of tin sulfate and the volume ratio of water are 40:1, and the unit is gram / liter; The quality of thiourea and water The volume ratio of sodium chloride is 50:1, and the unit is g / L; the volume ratio of the mass of sodium chloride to water is 6:1, and the unit is g / L.

[0042] The time for the tin-free part to react with the repair solution is 30 seconds.

[0043] The contact of the tin-free part with the repair solution is carried out by coating.

[0044] The heating temperature for the reaction between the tin-free part and the repair solution is 30° C., and the reaction time is 30 seconds.

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PUM

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Abstract

The invention relates to a tin plating method for a metal surface. The method comprises the following steps: enabling a tin-free part to be in contact with a repairing solution for chemical reaction,wherein the heating temperature during chemical reaction is 30-40 DEG C; and washing and drying after the tin-free part is reacted with the repairing solution, wherein the solute of the repairing solution is tin sulfate, thiourea and sodium chloride, and the solvent of the repairing solution is water. The novel method for realizing rapid tin plating is uniform in film formation, smooth in light quantity and good in conductivity.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a method for tinning a metal surface, and more specifically to a method for repairing a tinned surface. Background technique [0002] At present, during the installation process of some tin-plated parts, it is found that the coating on the outer surface is scratched and damaged, and local repairs are required. However, the current formulation of the repair solution for local damage to the tin-plated film is complex and inconvenient to prepare, and the repair method is costly and inefficient. Contents of the invention [0003] The purpose of the invention is to provide a tinning repair solution and simplify the tinning repairing process. [0004] Technical scheme of the present invention is: [0005] Technical solution: provide a tinning method for a metal surface, the tinning method includes a first tinning process and a second tinning process, the first tinnin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/31C23C18/16
CPCC23C18/1603C23C18/31
Inventor 李忠山石磊赵仲严
Owner BEIJING SHUGUANG AERO ELECTRICAL
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