Continuous electroplating process for weldable aluminum coiled material

An electroplating process and solderability technology, which is applied in the field of continuous electroplating process of weldable aluminum coils for heat sinks, can solve the problems of time-consuming, labor-intensive, high cost, etc., and achieve the effect of good bonding force, low cost and less pollution

Inactive Publication Date: 2011-05-25
WUXI XINDAZHONG STEEL SHEET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the problem of time-consuming and labor-intensive, and the cost is also high.
As a weldable aluminum pla

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: A continuous electroplating process for weldable aluminum coils, comprising the following process steps:

[0031] (1) Prepare alkali solution, acid solution, zinc alloy solution, zinc stripping solution, nickel plating solution and tin plating solution for use;

[0032] The preparation of described lye: sodium hydroxide 5g / L, sodium carbonate 10g / L, sodium phosphate 10g / L, sodium fluoride 1g / L, sodium lauryl sulfate 0.1g / L, all the other are water; Sodium oxide, sodium carbonate, sodium phosphate, sodium fluoride, sodium lauryl sulfate are mixed with water at room temperature to prepare lye;

[0033] The preparation of the acid solution: nitric acid 30g / L, sulfuric acid 5g / L, the balance is water, the unit is mass percent; nitric acid, sulfuric acid are mixed with water at normal temperature to prepare the acid solution;

[0034] The preparation of described zinc alloy liquid: sodium hydroxide 30g / L, zinc oxide 10g / L, nickel sulfate 10g / L, potassium sodiu...

Embodiment 2

[0051] Embodiment 2: A continuous electroplating process for weldable aluminum coils, comprising the following process steps:

[0052] (1) Prepare alkali solution, acid solution, zinc alloy solution, zinc stripping solution, nickel plating solution and tin plating solution for use;

[0053]The preparation of described lye: sodium hydroxide 100g / L, sodium carbonate 50g / L, sodium phosphate 50g / L, sodium fluoride 10g / L, sodium lauryl sulfate 2g / L, all the other are water; Sodium, sodium carbonate, sodium phosphate, sodium fluoride, sodium lauryl sulfate are mixed with water at room temperature to prepare lye;

[0054] The preparation of the acid solution: nitric acid 40g / L, sulfuric acid 10g / L, the balance is water, the unit is mass percent; nitric acid, sulfuric acid are mixed with water at normal temperature to prepare the acid solution;

[0055] The preparation of described zinc alloy liquid: sodium hydroxide 300g / L, zinc oxide 70g / L, nickel sulfate 60g / L, potassium sodium ta...

Embodiment 3

[0072] Embodiment 3: A continuous electroplating process for weldable aluminum coils, comprising the following process steps:

[0073] (1) Prepare alkali solution, acid solution, zinc alloy solution, zinc stripping solution, nickel plating solution and tin plating solution for use;

[0074] The preparation of described lye: sodium hydroxide 50g / L, sodium carbonate 3g / L, sodium phosphate 4g / L, sodium fluoride 5 / L, sodium lauryl sulfate 1 / L, all the other are water; Sodium, sodium carbonate, sodium phosphate, sodium fluoride, sodium lauryl sulfate are mixed with water at room temperature to prepare lye;

[0075] The preparation of the acid solution: 35 g / L of nitric acid, 6 g / L of sulfuric acid, the balance is water, and the unit is mass percent; nitric acid and sulfuric acid are mixed with water at normal temperature to prepare the acid solution;

[0076] The preparation of described zinc alloy liquid: sodium hydroxide 10g / L, zinc oxide 5g / L, nickel sulfate 4g / L, potassium sod...

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PUM

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Abstract

The invention relates to a continuous electroplating process for a weldable aluminum coiled material. The process is characterized by comprising the following process steps of: (1) preparing alkali liquor, acid liquor, zinc alloy liquor, zinc removing solution, nickel plating solution and tin plating solution; (2) removing oil; (3) performing primary washing; (4) etching with the alkali liquor; (5) performing secondary washing; (6) performing acid washing; (7) performing tertiary washing; (8) dipping a zinc alloy for the first time; (9) removing zinc by using nitric acid; (10) dipping the zinc alloy for the second time; (11) plating nickel, namely electroplating nickel for the aluminum coiled material which is subjected to zinc alloy dipping treatment for the second time, wherein the current density for electroplating the nickel is between 2 and 10A/cm<2>; and (12) electroplating tin, namely electroplating tin for the nickel-plated aluminum coiled material, wherein the current density for electroplating the tin is between 2 and 15A/cm<2>, and the temperature of the tin plating solution is between 30 and 60 DEG C. The continuous electroplating process guarantees high bonding force between a tin electroplated layer and an aluminum material, so that the tin electroplated layer does not bubble, fall off or peel; and the continuous electroplating process has the advantages of low cost and light pollution.

Description

[0001] technical field [0002] The invention relates to an electroplating process, in particular to a continuous electroplating process for weldable aluminum coils for heat sinks. Background technique [0003] With the rapid development of electronic products, the integration of chips is getting higher and higher, and the area of ​​LED lights is increasing, the heat dissipation problem caused by them is becoming more and more serious. Due to the poor weldability of aluminum, the current method is to stamp the aluminum sheet first and then perform electroless plating or electroplating to enhance its weldability. This method has the problem of time-consuming and labor-consuming, and the cost is also high. As a weldable aluminum plate, there is also a direct nickel plating process on aluminum, which uses nickel as a weldable coating with a high cost. [0004] Continuous electroplating can improve the electroplating efficiency and reduce the degree of environmental pollution...

Claims

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Application Information

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IPC IPC(8): C25D5/30C25D5/12C25D3/30C25D7/06
Inventor 周明华
Owner WUXI XINDAZHONG STEEL SHEET
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