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Water-based ceramic anticorrosive coating containing aluminum phosphate as well as preparation and curing methods thereof

A technology of aluminophosphate and anti-corrosion coatings, applied in anti-corrosion coatings, coatings and other directions, can solve the problems of lack of commercial application of aluminophosphate coatings

Inactive Publication Date: 2016-03-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating uses phosphate as the binder and aluminum powder as the filler, which can provide good corrosion protection for steel in normal temperature saline environment and high temperature oxidation environment, but there is no commercial application of aluminum-containing phosphate coatings

Method used

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  • Water-based ceramic anticorrosive coating containing aluminum phosphate as well as preparation and curing methods thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Mix 1000 parts of aluminum dihydrogen phosphate with 1200 parts of distilled water to form a uniform solution, add 60 parts of tetraethyl orthosilicate, and stir with magnetic stirring under sealed conditions until the tetraethyl orthosilicate is completely hydrolyzed and forms a clear solution. Then add 8 parts of zinc oxide and 10 parts of magnesium oxide, stir continuously to dissolve them completely, add 28 parts of magnesium chromate, mix evenly, add 45 parts of micronano aluminum powder and disperse evenly, and the coating is prepared. The paint was sprayed onto the polished steel plate by air spraying, dried in an oven at 120°C for 2 hours, and then heated to 200°C for 17 hours to prepare the coating.

[0025] Example 1 formula coating test performance is as follows:

[0026] (1) In the neutral salt spray test, rust spots appeared on the surface of the coating after 1008 hours of neutral salt spray test

[0027] (2) Under the high-temperature oxidation test con...

example 2

[0029] Mix 1300 parts of aluminum dihydrogen phosphate with 1000 parts of distilled water to form a uniform solution, add 40 parts of tetraethyl orthosilicate, and stir with magnetic stirring under sealed conditions until the tetraethyl orthosilicate is completely hydrolyzed and forms a clear solution. Then add 9 parts of zinc oxide and 9 parts of magnesium oxide, stir continuously to dissolve them completely, add 24 parts of magnesium chromate, mix evenly, add 48 parts of micronano aluminum powder and disperse evenly, and the coating is prepared. The paint was sprayed onto the polished steel plate by air spraying, dried in an oven at 120°C for 2 hours, and then heated to 200°C for 17 hours to prepare the coating.

[0030] Example two formula paint test performance is as follows:

[0031] (1) In the neutral salt spray test, rust spots appeared on the surface of the coating after 960 hours of neutral salt spray test;

[0032] (2) Under the high-temperature oxidation test cond...

example 3

[0034] Mix 1500 parts of aluminum dihydrogen phosphate with 1100 parts of distilled water to form a uniform solution, add 20 parts of tetraethyl orthosilicate, and stir with magnetic stirring under sealed conditions until the tetraethyl orthosilicate is completely hydrolyzed and forms a clear solution. Then add 10 parts of zinc oxide and 8 parts of magnesium oxide, stir continuously to dissolve them completely, add 30 parts of magnesium chromate, mix well, add 50 parts of micronano aluminum powder and disperse evenly, and the coating is prepared. The paint was sprayed onto the polished steel plate by air spraying, dried in an oven at 120°C for 2 hours, and then heated to 200°C for 17 hours to prepare the coating.

[0035] Example three formula paint test performance is as follows:

[0036] (1) In the neutral salt spray test, obvious rust spots appeared on the surface of the coating after 1104 hours of neutral salt spray test;

[0037] (2) Under the high-temperature oxidation...

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Abstract

The invention discloses a water-based ceramic anticorrosive coating containing aluminum phosphate as well as preparation and curing methods thereof. The water-based ceramic anticorrosive coating containing aluminum phosphate is prepared by adopting aluminium dihydrogen phosphate as a bonding agent, magnesium oxide and zinc oxide as a curing agent, aluminum powder as filler, magnesium chromate as a passivating agent and tetraethyl orthosilicate as an auxiliary agent. The coating is used for preparing a metal ceramic coating layer on a metallic matrix, and the coating layer can tolerate 1000h of neutral salt fog test and keep stable. The coating layer has good high-temperature oxidation resistance in a high-temperature (600 DEG C) oxidation environment. The coating layer can well protect metals in a normal-temperature salt-containing environment and a high-temperature oxidation environment.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a water-based aluminum-containing phosphate ceramic anti-corrosion coating using phosphate as a binder and aluminum powder as a filler and a preparation and curing method thereof. Background technique [0002] As more and more metal materials are applied to engineering equipment, metal workpieces used in high-temperature, high-humidity, and highly corrosive environments often suffer severe corrosion, which affects the operation and use of the entire engineering equipment. Compared with the normal temperature environment, the high temperature oxidation environment will cause the metal to oxidize and corrode more rapidly, and the comprehensive mechanical properties of the metal workpiece will drop rapidly. Comprehensive corrosion protection in corrosive environments. [0003] At present, most anti-corrosion coatings are used for corrosion protection in normal temperature env...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/10
Inventor 李淑琴王云鹏张平则魏东博潘儒杰陈小虎魏祥飞
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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