Water base non-chrome zinc-aluminium coating and methods for preparing and using same

A zinc-aluminum, water-based technology, used in devices and coatings for coating liquids on the surface, can solve problems such as poor sealing of the coating film, influence on anti-corrosion performance, coating defects, etc., to improve the working environment and reduce the use of amount of effect

Active Publication Date: 2013-02-06
翊鹏(湖北)实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the implementation described in this technology requires the addition of a defoamer, indicating that the formulation will generate a large number of air bubbles during the implementation process, which will cause poor sealing of the coating film, and the air bubbles will easily lead to coating film defects, thereby affecting anti-corrosion performance
[0006] In view of the above, the research on chrome-free zinc-aluminum anti-corrosion coatings needs to be further developed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The preparation method of water-based chrome-free zinc-aluminum film coating liquid of the present invention:

[0032] Weigh a certain amount of flaky zinc powder and aluminum powder according to the proportion and mix them with an organic solvent and stir evenly for use; mix the reducing agent and wetting agent, add an appropriate amount of deionized water and stir evenly, and then add the previously mixed Flake metal powder slurry, made into A component;

[0033] Weigh a certain amount of thickener, adhesive and silicon-containing compound in proportion, add an organic solvent and stir evenly to make component B;

[0034] A and B components are mixed according to the volume ratio of 2:1, and stirred until uniform, that is, the water-based chromium-free zinc-aluminum film coating solution is prepared.

[0035] The using method of water-based chromium-free zinc-aluminum film coating solution of the present invention:

[0036] When using, judge whether to add a thicken...

Embodiment 1

[0039] Weigh 100g of scaly zinc powder, 20g of aluminum powder and 30g of magnesium powder, mix them evenly and add them to 600 ml of organic solvent n-butanol, stir evenly, and set aside; take 60ml of reducing agent n-butanol and 30ml of OP-10 wetting agent After mixing, add 300ml of deionized water and stir evenly, then add the previously mixed flake metal powder slurry, and use a high-speed disperser (rotating speed 700 rpm) to fully wet and disperse to a homogeneous phase to ensure that the coating has no small particles of polymer , made into A component;

[0040] Take 720ml of deionized water, add 60ml of bisphenol A epoxy resin and 66ml of sodium hydroxyethyl cellulose, stir with a high-speed mixer for 2 hours to fully disperse the binder, then add n-butanol, stir for 1 hour, and mix well. Add 15ml of tetraethyl orthosilicate, stir well, and make component B;

[0041] Mix the prepared components A and B at a ratio of 2:1 by volume, and stir until uniform, and then a wa...

Embodiment 2

[0045] Weigh 125g of flaky zinc powder and 25g of aluminum powder, mix them evenly and add to 290ml of organic solvent ethylene glycol, stir evenly, and set aside; take 36ml of reducing agent ethylene glycol, 12ml of OP-10 wetting agent, mix and add 130ml to remove Stir the ionic water evenly, then add the flake metal powder slurry that has been mixed uniformly before, and use a high-speed disperser (rotating speed 700 rpm) to fully wet and disperse to a homogeneous phase to ensure that the coating has no small particle polymers, and then make A group Minute;

[0046] Take 60ml of deionized water, add 45ml of bisphenol A epoxy resin and 15ml of thickener triglycerol, stir with a high-speed mixer for 2 hours to fully disperse the binder, then add ethylene glycol, stir for 1 hour, and mix well , add 4ml of tetraethyl orthosilicate, stir evenly, and make component B;

[0047] Mix the prepared components A and B at a ratio of 2:1 by volume, and stir until uniform, and then a wat...

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Abstract

The invention relates to a water base non-chrome zinc-aluminium coating and methods for preparing and using the same. The coating is prepared by proportionally mixing a component A and a component B; the component A contains 50-150g/L of lamellar metal powder, 145-290ml/L of organic solvent, 10-200ml/L of deionized water, 10-36ml/L of reducing agent and 5-15ml/L of wetting agent; and the component B contains 60-240ml/L of deionized water, 20-75ml/L of binding agent, 8-22ml/L of thickening agent, 4-8ml/L of silicon compound and the balance of the organic solvent. The method for preparing the water base non-chrome zinc-aluminium coating comprises the steps of: weighing the lamellar metal powder proportionally to be mixed uniformly, and then adding the organic solvent to be mixed uniformly for later use; mixing the reducing agent with the wetting agent, adding an appropriate amount of the deionized water to be mixed uniformly, and then adding the lamellar metal powder liquid to prepare the component A; proportionally weighing the thickening agent, the binding agent and the silicon compound, and adding the organic solvent to be mixed uniformly to prepare the component B; and mixing the prepared component A and the prepared component B according to the ratio of 2:1, and stirring unit uniform, thus obtaining the coating. The method for using the water base non-chrome zinc-aluminium coating is that the coating is coated on a part to be treated, and the baking temperature is increased to 360 DEG C so as to solidify and crosslink the coating to form a dense protective layer. The coating has the corrosion resistance which reaches 840 hours of a neutral salt spray test and over 96 hours of a heat resistance test, the usage amount of harmful substances is greatly reduced, and the working environment is improved.

Description

technical field [0001] The invention belongs to the technical field of metal surface anticorrosion treatment, and relates to a water-based chrome-free zinc-aluminum coating and a preparation method thereof. Background technique [0002] With the introduction of Dacromet from Japan to my country by the Ministry of Aviation Industry in 1993, the zinc-aluminum-chromium film (commonly known as Dacromet film) technology began to be applied and developed in China. Because Dacromet technology has the advantages of no hydrogen embrittlement, less pollution, and good corrosion resistance, in 1996, the Ministry of Machinery Industry listed Dacromet as a key funding development project for clean production. In 1999, Dacromet was listed by the State Environmental Protection Administration as a National key environmental protection and practical technology, now it has become a hot spot recommended by the electroplating and coating industry around the world. [0003] However, with the im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/12B05D7/24B05D7/14
Inventor 王宏
Owner 翊鹏(湖北)实业有限公司
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