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Cyanide-free zinc dipping solution and cyanide-free electroplating method of filter aluminium alloy by using the same

A filter and zinc immersion technology, which is applied in the field of electroplating of aluminum and aluminum alloys, can solve the problems of blistering of the substrate and the coating layer, high silicon content, no nickel or low nickel content in the zinc immersion layer, and saves the cost of opening the cylinder. , the effect of simple wastewater treatment and improved production efficiency

Active Publication Date: 2012-10-17
GUANGZHOU HONWAY TECH CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current cyanide-free zinc dipping solution used for electroplating filter aluminum alloys has the following disadvantages: ① Due to the high silicon content, it brings great difficulties to zinc dipping and electroplating, and there is no copper or copper content in the zinc dipping layer. Stable, resulting in blistering and peeling between the substrate and the coating, or poor bonding of blistering and peeling after the 220 thermal shock bonding test; ②Nickel-free or very low nickel content in the zinc-impregnated layer, far less than that containing cyanide Zinc dipping, or the quaternary (Zn-Ni-Cu-Fe) zinc dipping layer has a high copper content, so that when the filter is subjected to impact plating after cyanide zinc dipping, there is a significant difference from that after cyanide zinc dipping. It is manifested in the low current density area of ​​low current density area after copper plating without cyanide zinc dipping, and the copper layer is dark, while the impact copper plating of cyanide zinc dipping is consistent with the red copper layer in the high and low current area

Method used

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  • Cyanide-free zinc dipping solution and cyanide-free electroplating method of filter aluminium alloy by using the same
  • Cyanide-free zinc dipping solution and cyanide-free electroplating method of filter aluminium alloy by using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Preparation of cyanide-free zinc dipping solution:

[0045] ① Dissolve zinc sulfate, nickel sulfate, copper sulfate, ferric chloride, cobalt chloride, sodium hydroxide, potassium pyrophosphate, triethanolamine, disodium EDTA, BOZ, ALS and SP with deionized water to obtain a cylinder opener; The concentration of each component is zinc ion 40g / L, nickel ion 10g / L, copper ion 0.4g / L, iron ion 1g / L, cobalt ion 2g / L, sodium hydroxide 150g / L, potassium pyrophosphate 100g / L , Triethanolamine 10g / L, Disodium EDTA 3g / L, BOZ 0.1g / L, ALS 1.85g / L, SP 0.05g / L.

[0046] ② The tank starter is 450ml / L, and the rest is deionized water to obtain a cyanide-free zinc dipping solution.

[0047] (2) Electroplating the filter aluminum alloy obtained in the above-mentioned cyanide-free zinc dipping solution, the steps are:

[0048] Pre-treatment → water washing → cyanide-free zinc immersion → water washing → impact copper plating → thickened copper plating → water washing → impact silver...

Embodiment 2

[0057] (1) Preparation of cyanide-free zinc dipping solution:

[0058] ① Dissolve zinc oxide, nickel chloride, copper nitrate, ferric sulfate, cobalt acetate, sodium hydroxide, HEDP, monoethanolamine, tetraethylenepentamine, DEP, PS and MESS with deionized water to obtain a cylinder opener; The concentration of ingredients is zinc ion 20g / L, nickel ion 2g / L, copper ion 0.001g / L, iron ion 0.05g / L, cobalt ion 1g / L, sodium hydroxide 80g / L, HEDP 50g / L, monoethanolamine 20g / L, tetraethylenepentamine 5g / L, DEP 1g / L, PS 0.2g / L, MESS 0.05g / L.

[0059] ② The potting agent is 500ml / L, and the rest is deionized water to obtain a cyanide-free zinc dipping solution.

[0060] (2) Electroplating the filter aluminum alloy obtained in the above-mentioned cyanide-free zinc dipping solution, the steps are:

[0061] Pre-treatment → water washing → cyanide-free zinc immersion → water washing → impact copper plating → thick copper plating → water washing → impact silver plating → thick silver pla...

Embodiment 3

[0070] (1) Preparation of cyanide-free zinc dipping solution:

[0071] ① Dissolve zinc chloride, nickel acetate, cuprous chloride, ferric nitrate, cobalt nitrate, ATMP, potassium pyrophosphate, nitrilotriacetic acid, diethanolamine, PPS-OH, PA, IZEC and TPS with deionized water to obtain open Tank agent; wherein the concentration of each component is zinc ion 30g / L, nickel ion 6g / L, copper ion 0.01g / L, iron ion 0.5g / L, cobalt ion 2g / L, potassium hydroxide 160g / L, ATMP 50g / L, potassium pyrophosphate 30g / L, nitrilotriacetic acid 20g / L, diethanolamine 10g / L, PPS-OH 0.5g / L, PA 0.2g / L, IZEC 0.05g / L, TPS 0.08g / L;

[0072] ② The potting agent is 550ml / L, and the rest is deionized water to obtain a cyanide-free zinc dipping solution.

[0073](2) Electroplating the filter aluminum alloy obtained in the above-mentioned cyanide-free zinc dipping solution, the steps are:

[0074] Pre-treatment → water washing → cyanide-free zinc immersion → water washing → impact copper plating → thick...

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Abstract

The invention discloses a cyanide-free zinc dipping solution and a cyanide-free electroplating method of filter aluminium alloy by using the cyanide-free zinc dipping solution. The cyanide-free zinc dipping solution, measured as per liter of cyanide-free zinc dipping solution, comprises 450-600 ml of plating bath solution and 400-550 ml of water, wherein the plating bath solution comprises 20-40 g / L zinc ions, 2-10 g / L nickel ions, 0.001-0.400 g / L copper ions, 0.05-1.00 g / L iron ions, 1-4 g / L cobalt ions, 80-200 g / L alkali metal hydroxide, 50-100 g / L main complexing agent, 13-40 g / L auxiliary complexing agent, and 0.07-2.00 g / L crystallization refiner. Zinc dipping and electroplating on materials with high silica content can be carried out by using the cyanide-free zinc dipping solution by just conducting zinc dipping once, the operation is simple, and the control is easy.

Description

technical field [0001] The invention belongs to the technical field of electroplating of aluminum and aluminum alloys, in particular to a cyanide-free zinc dipping solution and a cyanide-free electroplating method for filter aluminum alloys using the solution. Background technique [0002] The traditional zinc dipping of aluminum and aluminum alloys is a cyanide-containing solution. According to the elimination category (14) in the "Industrial Structure Adjustment Guidance Catalog (2007)", the other clearly listed cyanide zinc dipping process is an elimination process. Therefore, it is very necessary to carry out research on zinc-dipping aluminum and aluminum alloy cyanide-free zinc precipitation process. [0003] Cyanide-free zinc dipping systems mainly include one-component (Zn), two-component (Zn-Ni, Zn-Fe), three-component (Zn-Ni-Fe) and four-component (Zn-Ni-Cu-Fe) systems. Regardless of the cyanide-free zinc dipping system, the second zinc dipping and electroplating p...

Claims

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Application Information

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IPC IPC(8): C25D5/44C25D3/40C25D3/46
Inventor 徐金来赵国鹏胡耀红周杰张晓明杨则玲鹿轩
Owner GUANGZHOU HONWAY TECH CORP
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