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Aqueous inorganic zinc-enriched coating and preparation method thereof

An inorganic zinc-rich coating, water-based technology, applied in the direction of anti-corrosion coatings, alkali metal silicate coatings, etc., can solve the problems of impact resistance, poor toughness, poor water resistance of the coating, porous coating, etc., to achieve water resistance and waterproof Excellent corrosion performance, good salt spray resistance, and enhanced bond strength

Inactive Publication Date: 2010-06-16
REAR SERVICE TECH EQUIP INST NAVY PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the high zinc powder content in the coating film, far exceeding CPVC, the coating film is porous, resulting in poor water resistance, impact resistance and toughness in the early stage of the coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 150kg of lithium silicate solution, 450kg of potassium silicate solution, and 4kg of polyacrylamide, and disperse for 40 minutes under medium-speed stirring to obtain a mixed silicate solution, and let it stand; Add 60kg of aluminum borate whiskers, then add 7kg of aminomethylpropanol, stir for 60 minutes, weigh 80kg of mica powder, 10kg of bentonite, 50kg of deionized water, stir for 60 minutes, weigh 6kg of BYK-028, and stir for 60 minutes minute. After the dispersion is uniform, it is fully stirred and mixed with the mixed silicate solution and 130 kg of deionized water to obtain component A. Component B is made by mixing 986kg of zinc powder, 7kg of zinc oxide and 7kg of aluminum tripolyphosphate. Component A and component B are mixed in a ratio of 1:1.8. The adhesion of the coated film is grade 1, the flexibility is grade 1, and the impact strength is 50kg.cm.

Embodiment 2

[0034] Weigh 200kg of potassium silicate solution, 400kg of sodium silicate solution, 6kg of polyvinyl alcohol, and 20kg of water-based acrylic resin, and disperse for 60 minutes under medium-speed stirring to obtain a mixed silicate solution, and let stand; another 100kg of deionized water is weighed , add 60kg of potassium hexatitanate whiskers under stirring state, then add 8kg of sodium polyacrylic acid, stir for 60 minutes, weigh 100kg of mica powder, 10kg of bentonite, 50kg of deionized water, stir for 60 minutes, weigh 8kg of BYK -024, stir well for 60 minutes. After dispersing evenly, mix well with the mixed silicate solution to obtain Component A. Component B is made by mixing 990kg of zinc powder, 4kg of sodium borate and 6kg of aluminum phosphate. Component A and component B are mixed in a ratio of 1:2.5. The adhesion of the coated film is grade 1, the flexibility is grade 1, and the impact strength is 50kg.cm.

Embodiment 3

[0036]Weigh 350kg of potassium silicate solution, 220kg of lithium silicate solution, 6kg of glyceryl etheroxypropyl trimethoxysilane, and 10kg of water-based silicone acrylic resin, and disperse for 60 minutes under medium-speed stirring to obtain a mixed silicate solution, and let stand; Another 100kg of deionized water was weighed, and 60kg of magnesium hexasulfate whiskers, 60kg of zinc oxide whiskers were added under stirring, and 8kg of byk-190 was added, fully stirred for 60 minutes, and 70kg of micaceous iron oxide, hydroxyethyl cellulose 10kg, 50kg deionized water, fully stirred for 60 minutes, weighed 8kg BYK-024, 50kg deionized water, fully stirred for 60 minutes. After dispersing evenly, mix well with the mixed silicate solution to obtain Component A. Component B is made by mixing 985kg of zinc powder, 4kg of sodium borate and 11kg of sodium fluorosilicate. Component A and component B are mixed in a ratio of 1:3.5. The adhesion of the coated film is grade 1, the ...

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Abstract

The invention relates to an aqueous inorganic zinc-enriched coating and a preparation method thereof. The coating is prepared by mixing a component A and a component B in a weight ratio of 1: 1.5-3.5. The preparation method for the component A comprises the following steps of: mixing 45 to 70 weight parts of alkaline metal silicate solution, 0 to 8 weight parts of water-soluble resin, 0.1 to 15 weight parts of modifying agent with stirring at an intermediate speed; and then adding 10 to 35 weight parts of deionization water, 2 to 18 weight parts of inorganic filling, 1 to 10 weight parts of crystal whisker reinforced material, 0.5 to 3.5 weight parts of aqueous auxiliary agent which comprises a dispersant, a thickening agent and a foam suppressor, and mixing the mixture to obtain the component A. The component B is prepared by the following steps of: mixing 95 to 98 weight parts of spherical zinc powder and 2 to 5 weight parts of curing agent. The coating prepared by the method has good early waterproof resistance, good flexibility, good impact resistance, strong construction adaptability and good salt mist corrosion resistance.

Description

1. Technical field [0001] The invention relates to a water-based inorganic zinc-rich coating and a manufacturing method thereof. The coating can be widely used in anticorrosion of steel structures. 2. Background technology [0002] Water-based inorganic zinc-rich coatings are one of the few excellent coating varieties with a corrosion resistance life of more than 10 years. The anti-corrosion effect on the substrate includes cathodic protection and shielding in the early stage of corrosion. The protection mechanisms involved include: shielding effect, cathodic protection, Coating film self-repair, passivation, etc. The coating film is hard and wear-resistant, has excellent chemical corrosion resistance within a certain pH range, and can withstand high temperatures up to 400 °C. It can be used either as a single long-lasting protective coat or as a primer for high-performance paint systems. Since the 1970s, it has been widely used in marine and industrial environments such a...

Claims

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Application Information

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IPC IPC(8): C09D1/04C09D5/10
Inventor 蔡森张松倪余伟黄洁李永姜蓬勃刘宏宇
Owner REAR SERVICE TECH EQUIP INST NAVY PLA
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