Alkaline chloride galvanizing additive and preparation method thereof

A treatment agent, chloride technology, applied in the field of alkaline chloride galvanizing treatment agent and its preparation, can solve the problems such as the gap between the bonding force and brittleness of the plating layer, the plating solution contains highly toxic cyanide, and the anti-impurity ability is not strong enough, etc. Achieve the effects of fast deposition speed, high bonding rate, and strong anti-impurity ability

Inactive Publication Date: 2008-09-03
唐军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, electroplating and galvanizing processes at home and abroad can be divided into four categories according to their electroplating solutions. 1. Cyanide galvanizing process. The coating has fine crystallization, wide range, good impurity tolerance, and good dispersion and coverage of the plating solution. , has no corrosive effect on steel equipment, but the plating solution contains highly toxic cyanide, and the discharged wastewater and waste gas are harmful to the environment
2. Zincate galvanizing process, typical formula: sodium hydroxide, zinc oxide, brightener, etc. This method is cyanide-free and has no corrosion to steel equipment. The passivation film is not easy to change color and black in the hot and humid atmosphere, and is corrosion-resistant Good performance, but the binding force and brittleness of the coating have a certain gap compared with cyanide galvanizing, and the anti-impurity ability is not strong enough
The main disadvantage is that there is a certain gap compared with cyanide galvanizing in terms of coating adhesion and brittleness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment uses sodium hydroxide: 520kg, potassium chloride: 270kg, zinc oxide: 32.5kg; DPE-3 auxiliary agent: 19kg; ZB-80 brightener: 19kg, water 4000kg. Add 1000kg of tap water into the electrolytic tank, pour sodium hydroxide into the tank, and stir until completely dissolved; make a paste of zinc oxide with a small amount of water, and gradually add it to the sodium hydroxide solution under constant stirring to make the zinc oxide Dissolve completely; then add potassium chloride to sodium hydroxide and zinc oxide solution, stir until completely dissolved, dilute to 4000kg with tap water, then add DPE-3 auxiliary agent; ZB-80 brightener, cool to below 45°C, at 0.1A / dm 2 Electrolyze for 2-3 hours at the current density of the plated parts, the area of ​​the cathode plated parts: the area ratio of the anode zinc plate and the iron plate is 1: 1.5, and the treatment agent is used for electroplating galvanizing. The baking temperature is 250℃ without peeling phenom...

Embodiment 2

[0031] This embodiment uses sodium hydroxide: 580kg, sodium chloride: 290kg, zinc oxide: 35kg; DPE-3 auxiliary agent: 20kg; ZB-80 brightener: 20kg, water: 3800kg. First add 1000kg of tap water into the electrolytic tank, pour sodium hydroxide into the tank, and stir until completely dissolved; make zinc oxide into a paste with a small amount of water, and gradually add it to the sodium hydroxide solution under constant stirring to make the oxidation Zinc is completely dissolved; then add potassium chloride to sodium hydroxide and zinc oxide solution, stir until completely dissolved, dilute to 3800kg with tap water, then add DPE-3 auxiliary agent; ZB-80 brightener, cool to below 45°C , at 0.15A / dm 2 Electrolyze for 2-3 hours at the current density of the plated parts, the area of ​​the cathode plated parts: the area ratio of the anode zinc plate and the iron plate is 1:1.8, the treatment agent is prepared for electroplating galvanizing, and the electroplated products are bright...

Embodiment 3

[0033] This embodiment uses sodium hydroxide: 660kg, sodium iodide: 320kg, zinc oxide: 40kg; DPE-3 auxiliary agent: 20kg; ZB-80 brightener: 20kg, water: 5000kg. Add 1800kg of tap water into the electrolytic tank, pour sodium hydroxide into the tank, and stir until completely dissolved; make zinc oxide into a paste with a small amount of water, and gradually add it to the sodium hydroxide solution under constant stirring to make the zinc oxide Dissolve completely; then add potassium chloride to sodium hydroxide and zinc oxide solution, stir until completely dissolved, dilute to 5000kg with tap water, then add DPE-3 auxiliary agent; ZB-80 brightener, cool to below 45°C, at 0.2A / dm 2 Electrolyze for 2-3 hours at the current density of the plated parts, the area of ​​the cathode plated parts: the area ratio of the anode zinc plate and the iron plate is 1:2, the treatment agent is prepared for electroplating, and the products produced by electroplating are bright and delicate, with...

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PUM

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Abstract

The invention discloses an alkaline chloride zinking primer, wherein the primer comprises following components based on mass percent: 9.6% to 14.5% sodium hydroxide, 5.0% to 7.0% potassium chloride, 0.6% to 0.9% zinc oxide, 0.35% to 0.45% DPE-3 adjuvant, 0.35% to 0.45% ZB-80 lustre-coating agent and 76% to 84% water. The preparation method of the alkaline chloride zinking primer is provided. The invention has advantages that the plating layer has high combination ratio, high depositing speed, bright and fined plated products without brittleness, coarse skin and color change when baking temperature is at 250 deg. C, great anti-impurity capacity, without fogging and bubbling phenomena. The salt spray test uses 150 hours to 200 hours with low cost. The invention saves energy and is easy to processes waste.

Description

technical field [0001] The invention relates to an alkaline chloride galvanizing treatment agent and a preparation method thereof. Background technique [0002] At present, electroplating and galvanizing processes at home and abroad can be divided into four categories according to their electroplating solutions. 1. Cyanide galvanizing process. The coating has fine crystallization, wide range, good impurity tolerance, and good dispersion and coverage of the plating solution. , has no corrosive effect on steel equipment, but the plating solution contains highly toxic cyanide, and the discharged waste water and waste gas are harmful to the environment. 2. Zincate galvanizing process, typical formula: sodium hydroxide, zinc oxide, brightener, etc. This method is cyanide-free and has no corrosion to steel equipment. The passivation film is not easy to change color and black in the hot and humid atmosphere, and is corrosion-resistant Good resistance, but there is a certain gap in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22
Inventor 陈伯荣李能松魏俊周谢东
Owner 唐军
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