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Water-based zinc-aluminum coating containing boric acid ester and/or aluminic acid ester

A technology of organic borate and aluminate, which is applied in the direction of anti-corrosion coatings, coatings, etc., can solve problems such as limitations and non-compliance with environmental protection requirements, and achieve the effects of improving corrosion resistance, improving storage stability, and preventing penetration

Pending Publication Date: 2020-05-08
沈阳市航达科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dacromet coating technology has been strictly restricted in many fields because the coating contains hexavalent chromium which is harmful to the human body and does not meet the current environmental protection requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0052] The water-based zinc-aluminum paint containing boric acid ester and / or aluminate of the present invention, its preparation method, comprises the steps:

[0053] (1) Add 4 / 5 polyethylene glycol and 1 / 5 silane coupling agent to the flaky zinc powder and flaky aluminum powder in the stated mass parts to make flaky zinc-aluminum mixed powder slurry, and directly prepare into A component;

[0054](2) Add silane coupling agent, 1 / 5 polyethylene glycol, organic borate and / or aluminate, molybdate, boric acid, surfactant, Foaming agent, fully stirred and hydrolyzed to disperse into a uniform liquid, and made into component B;

[0055] (3) Before use, mix the two components A and B according to the mass ratio of 1: (1.0-1.4) and stir evenly, which is the finished product.

[0056] Preferably: it also includes adding an appropriate amount of thickener to the finished product mixed in step (3).

[0057] Preferably: the thickener is one or more of hydroxymethyl cellulose, hydroxy...

Embodiment 1-2

[0061] Example 1 Example 2 Element mass (g) mass (g) Flake Zinc Powder 260 260 Flake aluminum powder 15 15 A silane coupling agent 110 110 Tributyl borate 60 ---- Triisopropyl aluminate ---- 60 Deionized water 350 350

[0062] Comparison of neutral salt spray test time (the time of each example, in hours, the same below)

[0063] Coating thickness Example 1 Example 2 6~8um 1200 1080 8~10um 1320 1200 10~12um 1500 1500

[0064] The coating adhesion of the above two examples is grade 5 (after the coating is completed, the Japanese adhesive tape grade 5 standard evaluation method is adopted, namely JDISK53114-4, the same below)

[0065] Note: The paint in this scheme should be used immediately after preparation.

Embodiment 3-4

[0067] Example 3 Example 4 Element mass (g) mass (g) Flake Zinc Powder ---- 350 Flake aluminum powder 180 ---- polyethylene glycol 200 100 A silane coupling agent 80 250 Fatty Alcohol Ethoxylates¹ 1 10 Fatty Alcohol Polyoxyethylene Ether² 2 15 Defoamer 1 5 Ammonium molybdate 3 25 Triethyl borate 1 200 boric acid 15 8 Deionized water 500 250

[0068] Comparison of neutral salt spray test time

[0069] Coating thickness Example 3 Example 4 6~8um 480 960 8~10um 504 984 10~12um 528 1056

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PUM

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Abstract

The invention discloses a water-based zinc-aluminum coating containing boric acid ester and / or aluminic acid ester. The water-based zinc-aluminum coating comprises the following components in parts bymass: 180-350 parts of zinc powder or aluminum powder or a mixture of the zinc powder and the aluminum powder, 80 to 250 parts of a silane coupling agent, 1 to 200 parts of organic boric acid ester and / or aluminic acid ester, 250 to 500 parts of water, 100 to 200 parts of an organic alcohol ether composition, 3 to 25 parts of molybdate, and 8-15 parts of boric acid. The coating has the advantagesthat the thickness of a coating layer is small, the adhesion strength of the coating layer is high, the coating layer does not contain chromium with any price, and the coating layer and the coating process meet the environmental protection requirements; the storage stability is excellent; and the corrosion resistance of the coating layer is improved.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, in particular to a water-based zinc-aluminum coating containing borate and / or aluminate. Background technique [0002] Among the existing metal-based anti-corrosion coatings, they are divided into organic anti-corrosion coatings and inorganic anti-corrosion coatings according to the composition of coating film-forming substances. Organic resin (such as epoxy resin, silicone resin, polyurethane resin, etc.) It is still the main body of metal heavy-duty anti-corrosion coatings. However, due to its poor environmental protection properties and thick coating, it has been greatly limited in its application in the field of anti-corrosion coating for fasteners. The invention of Dacromet paint has created the technical road of zinc-chromium / zinc-chromium-aluminum water-based inorganic metal anti-corrosion coatings. Dacromet coating is based on the ceramic glass phase chromate polymer bo...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/63C09D5/10C09D7/61
CPCC09D1/00C09D5/103C09D5/106C09D7/61C09D7/63
Inventor 殷跃军杨宏强李庆鹏关刃韩长智
Owner 沈阳市航达科技有限责任公司
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