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Environment-friendly metal surface treating agent and using method thereof

A metal surface treatment and environmental protection technology, applied in the direction of metal material coating process, etc., can solve the problems of polluting the environment, increasing the operating cost of enterprises, and eutrophication pollution of rivers, achieving strong corrosion resistance, simple treatment method, coating Good layer adhesion

Inactive Publication Date: 2010-05-05
芜湖市瑞杰环保材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phosphating and chromium passivation also bring serious environmental pollution. The phosphating solution contains a large amount of inorganic phosphorus. During use, with the discharge of wastewater, it will cause eutrophic pollution of rivers and lakes, and even cause drinking water for urban and rural residents in our country. Water safety poses a threat; the phosphating solution also contains zinc, manganese, nickel and other heavy metals that are harmful to human health. A large amount of waste residue will be generated during the phosphating process and will seriously pollute the environment. operating costs, and the impact on the environment cannot be completely eliminated; hexavalent chromium in chromium passivation products is extremely toxic, and countries all over the world are strictly restricting its use

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0033] The preparation method and steps of the surface treatment agent disclosed by the present party are as follows:

[0034] 1. Add two-thirds of the total amount of deionized water into the reaction kettle, and then add compounds containing fluoride ions, zirconium ions and / or titanium ions and stir until completely dissolved into a clear solution.

[0035] 2. Add silane coupling agent and dispersant to the above clear solution and stir thoroughly for 2 hours until clear;

[0036] 3. Add nano silicon dioxide to the above liquid and stir until it becomes a clear colloid, then add stabilizers, accelerators and the remaining amount of deionized water, and fully stir to form a clear colloid.

Embodiment 1

[0038] Sodium Fluoride 2%

[0039] Ammonium zirconium oxycarbonate 5%

[0040] Vinylethoxysilane 8%

[0041] Nano Silica 4%

[0042] Polyvinyl alcohol 0.3%

[0043] Sodium chloride 0.3%

[0044] The rest is tap water

[0045] The workpiece to be processed is a cold-rolled plate produced by Maanshan Iron and Steel Co., Ltd., and the process is as follows:

[0046] Step 1: Alkaline phosphorus-free degreasing;

[0047] Step 2: Two washes with water;

[0048] Step 3: surface treatment, process parameters: PH value 5.5, total acidity 5 points, normal temperature treatment, treatment time 5 minutes, treatment method: soaking;

[0049] Step 4: Washing;

[0050] Step five: drying;

[0051] Step six: spraying;

[0052] Step Seven: Curing.

[0053] The surface treatment results are as follows: the adhesion force of the 100-grid method is 0, and the unilateral peeling of the fork neutral salt spray test for 240 hours is less than 0.5mm.

Embodiment 2

[0055] Fluorozirconic acid (provides both fluoride and zirconium ions) 10%

[0056] 3-Glycidoxypropyltriethoxysilane 10%

[0057] Dispersed Nano Silica 2%

[0058] Ammonium Fluotitanate 0.5%

[0059] the rest of the tap water

[0060] The processed workpiece is hot-dip galvanized sheet produced by Baosteel, and the process is as follows:

[0061] Step 1: Alkaline phosphorus-free degreasing;

[0062] Step 2: Two washes with water;

[0063] Step 3: surface treatment, process parameters: PH value 4.5, total acidity 5 points, normal temperature treatment, treatment time: 1.5 minutes, treatment method: spraying;

[0064] Step 4: Washing;

[0065] Step five: drying;

[0066] Step six: spraying;

[0067] Step Seven: Curing.

[0068] The surface treatment results are: the adhesion force of the 100-grid method is 0, and the unilateral peeling of the neutral salt spray test for 500 hours is less than 0.5mm.

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PUM

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Abstract

The invention discloses an environment-friendly metal surface treating agent and a using method thereof. The treating agent comprises fluoride, zircon salt, silane, silicon dioxide, accelerating agent, dispersing agent and stabilizing agent. A conversion coating having the advantages of being compact and even, strong in corrosion resistance and excellent in adhesive force of the coating is respectively formed on the metal surface of steel and zinc; a treatment method of the metal surface treating agent is simple and is operated at the normal temperature; the original phosphating treatment equipment can be used without any change; and strong acid and strong base are not used as the treating agent; therefore, the environment-friendly metal surface treating agent is safe in production without emission, and is the best substitute product of the phosphating treatment technique and an energy-saving type environment-friendly product.

Description

technical field [0001] The invention belongs to a metal surface treatment agent and a use method thereof, and more specifically relates to a phosphorus-free and chromium-free metal surface treatment agent and a use method thereof. Background technique [0002] Phosphating as a pre-painting treatment has a history of more than 100 years. The British patent granted to Ross in 1869 is the first patent on phosphating in the world. my country began to introduce and apply phosphating technology in the 1980s. With the rapid development of my country's home appliance and automobile industries, phosphating solutions are widely used in my country, and there are countless manufacturers of phosphating solutions. Chromium passivation also has self-repairing functions. Exhibits strong corrosion resistance and is widely used in the surface treatment industry. However, phosphating and chromium passivation also bring serious environmental pollution. The phosphating solution contains a large ...

Claims

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Application Information

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IPC IPC(8): C23C22/34C23C22/44
CPCC23C2222/20
Inventor 褚维杰钱炳南彭强
Owner 芜湖市瑞杰环保材料科技有限公司
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