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Potassium chloride cyanide-free titanium alloy plating solution, its preparation method and electroplating process

A technology of potassium chloride and titanium alloy, which is applied in the field of potassium chloride cyanide-free titanium alloy electroplating and electroplating, and can solve the problems of low stability of the plating solution, many inclusions, and decreased corrosion resistance of the coating.

Active Publication Date: 2020-10-23
GUANGZHOU ULTRA UNION CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This ammonium salt cyanide-free cadmium plating titanium alloy solution uses EDTA and nitrilotriacetic acid as complexing agents, which brings great difficulties to the treatment of electroplating wastewater
This plating solution uses thiourea and gum arabic as brighteners, thiourea is more mixed in the coating, which reduces the corrosion resistance of the coating, and the decomposition products of gum arabic have adverse effects on the coating, and the stability of the plating solution is not high

Method used

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  • Potassium chloride cyanide-free titanium alloy plating solution, its preparation method and electroplating process
  • Potassium chloride cyanide-free titanium alloy plating solution, its preparation method and electroplating process

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Embodiment 1

[0048] The potassium chloride cyanide-free cadmium titanium alloy plating solution composition and the concentration of the present embodiment are as follows:

[0049] Cadmium chloride 30g / L, potassium chloride 150g / L, complexing agent 130g / L, sodium fluoride 3g / L, titanium salt supplement 5mL / L, brightener 2mL / L, auxiliary agent 30mL / L Dose 10mL / L;

[0050] The displacement agent contains water-soluble propargyl amide polymer with a mass concentration of 8-12g / L, sodium dimethylbenzenesulfonate with a mass concentration of 50-80g / L, and a product model of polyoxyethylene PE 600 Ether phosphate 80~120mL / L. Add 8-12g of water-soluble propargyl amide polymer, 80-120mL of polyoxyethylene ether phosphate with a mass concentration of sodium dimethylbenzene sulfonate of 50-80g and product model PE 600 into 500mL of water, stir well and add water to 1000mL.

[0051] The complexing agent is composed of three components A, B and C, wherein component A is nitrilotriacetic acid, compo...

Embodiment 2

[0084] The composition and concentration of the barrel plating potassium chloride cyanide-free cadmium titanium alloy plating solution of the present embodiment are as follows:

[0085] Cadmium chloride 25g / L, potassium chloride 180g / L, complexing agent 100g / L, sodium fluoride 1g / L, titanium salt replenisher 2mL / L, brightener 2mL / L, auxiliary agent 30mL / L, position Dose 5ml / L;

[0086]The mass concentration of the water-soluble propargyl amide polymer contained in the moving agent is 5-10g / L, the mass concentration of sodium dimethylbenzenesulfonate is 70-100g / L, and the product model is polyoxyethylene PE 600 Ether phosphate 100~150mL / L. Add 5-10g of water-soluble propargyl amide polymer, 70-100g of sodium dimethylbenzene sulfonate, and 100-150mL of polyoxyethylene ether phosphate ester of product model PE 600 into 500mL of water, stir well and add water to 1000mL.

[0087] The preparation method of the complexing agent, brightener, auxiliary agent and titanium salt replen...

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Abstract

The invention discloses a potassium chloride cyanide-free cadmium titanium alloy plating solution and a preparation method and electroplating process of the potassium chloride cyanide-free cadmium titanium alloy plating solution. The plating solution per liter comprises 20-35g of cadmium chloride, 80-140g of a complexing agent, 120-200g of potassium chloride, 1-5g of sodium fluoride, 2-5mL of a titanium salt supplement, 1-3mL of a brightening agent, 20-40mL of an auxiliary agent and 5-15mL of a displacement agent. According to the electroplating operation conditions, the pH value of the plating solution is 6.5-7.5, plating bath temperature is 20-35 DEG C, the cathode current density is 0.5-2A / dm<2>, and the area ratio of a cathode to an anode is 2:(1-3). The plating solution is stable, convenient to maintain and small in process hydrogen brittleness, and a cadmium titanium alloy coating is excellent in corrosion resistance and good in market prospect.

Description

technical field [0001] The invention relates to the field of electroplating, in particular to the technical field of potassium chloride cyanide-free and cadmium-free titanium alloy electroplating. Background technique [0002] With the development of high-altitude and high-speed aircraft, the aviation industry uses a large number of high-strength structural materials, but the Achilles' heel of this type of material is its high sensitivity to hydrogen embrittlement and its tendency to stress corrosion cracking. Therefore, avoiding hydrogen embrittlement is a problem that must be fully paid attention to during the processing and use of high-strength structural materials. In order to prevent hydrogen embrittlement in the electroplating process, it is required to bake hydrogen at 200°C for more than 20 hours after electroplating, and use porous electroplating to improve the hydrogen removal effect, but the protective performance of the porous electroplating layer is very poor an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/56C25D5/00C25D5/48
CPCC25D3/56C25D5/00C25D5/48
Inventor 郭崇武赖奂汶
Owner GUANGZHOU ULTRA UNION CHEM LTD
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