A method for preparing a black ceramic coating on the surface of a metal substrate

A technology of black ceramics and metal substrates, which is applied in the direction of surface coating liquid devices, coatings, special surfaces, etc., can solve the problems of coating shedding efficiency, weak corrosion resistance, poor bonding, etc., to reduce environmental pollution, Increased curing speed and high sunlight absorption

Active Publication Date: 2022-04-29
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of a heat-absorbing coating on the surface of the metal substrate must ensure the corrosion resistance of the metal substrate, and avoid the defects of traditional solar thermal products such as coating peeling or efficiency reduction due to poor bonding or weak corrosion resistance.

Method used

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  • A method for preparing a black ceramic coating on the surface of a metal substrate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) The black slag powder particles discharged from the vanadium-titanium magnetite factory are sintered at 1180° C. into porcelain, pulverized and ball milled to make black ceramic powder particles with a diameter of 500 microns;

[0029] (2) Weigh the black ceramic powder particles, binder, curing agent and water glass respectively according to the ratio of 82 parts of black ceramic powder particles, 10 parts of binder, 5 parts of curing agent, and 3 parts of water glass, and then add them to the ball mill in sequence Adding water in wet method and mixing to prepare black paint, after sieving to remove iron and impurities, the water content of black paint is 25wt%;

[0030] (3) Put the aluminum alloy substrate into a chemical pool for surface treatment such as degreasing, cleaning, rust removal, phosphating, passivation, etc., to remove impurities and foreign matter;

[0031] (4) The black paint is sprayed onto the surface of the metal substrate by electrostatic spray...

Embodiment 2

[0036] (1) The black slag powder particles discharged from the vanadium-titanium magnetite factory are sintered at a high temperature of 1150°C to form porcelain, pulverized and ball milled to make black ceramic powder particles with a diameter of 600 microns;

[0037] (2) Weigh black ceramic powder particles, binder, curing agent and water glass according to 78 parts of black ceramic powder particles, 12 parts of binder, 6 parts of curing agent, and 4 parts of water glass, and then add them to the ball mill in sequence Add water and wet mixing to prepare black paint, after sieving to remove iron and impurities, the water content of black paint is 27wt%;

[0038] (3) Put the magnesium alloy substrate into a chemical pool for surface treatment such as degreasing, cleaning, rust removal, phosphating, passivation, etc., to remove impurities and foreign matter;

[0039] (4) The black paint is sprayed onto the surface of the metal substrate by a pressure spraying process, and a thr...

Embodiment 3

[0044] (1) The black slag powder particles discharged from the vanadium-titanium magnetite plant are sintered at a high temperature of 1130°C to form porcelain, crushed and ball milled to make black ceramic powder particles with a diameter of 800 microns;

[0045] (2) Weigh black ceramic powder particles, binder, curing agent and water glass according to 74 parts of black ceramic powder particles, 14 parts of binder, 7 parts of curing agent, and 5 parts of water glass, and then add them to the ball mill in sequence Add water and wet mixing to prepare black paint, after sieving to remove iron and impurities, the water content of black paint is 29wt%;

[0046] (3) Put the stainless steel substrate into the chemical pool for surface treatment such as degreasing, cleaning, rust removal, phosphating, passivation, etc., to remove impurities and foreign matter;

[0047] (4) The black paint is sprayed onto the surface of the metal substrate by a pressure spraying process, and a three-...

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Abstract

The invention relates to a method for preparing a black ceramic coating on the surface of a metal substrate. The black paint is prepared from black ceramic powder particles, binder, curing agent, water glass and water, and the black paint is sprayed onto the surface of the metal substrate by a spraying process. , After low-temperature drying and high-temperature curing, it solidifies on the surface of the metal substrate to form a black ceramic coating with a three-dimensional rough surface. The black ceramic coating prepared by the invention can not only protect the surface of the metal substrate from corrosion, but also improve the sunlight absorption rate and be used as a photothermal conversion material.

Description

technical field [0001] The invention relates to a method for preparing a black ceramic coating, which belongs to the technical field of composite material preparation. Background technique [0002] Metal materials have rigidity and good thermal conductivity, and are widely used in structural materials. However, in the utilization of solar energy, the surface of metal materials does not have good light absorption and light reflection, so surface treatment is usually required to increase light utilization efficiency. Complementary advantages can only be realized by giving full play to the advantages of each material. [0003] In the prior art, black glaze is coated on the surface of metal materials. Usually, the glaze is coated on the surface of the substrate to form a glaze coating, and the glaze coating is dried. The enamel coating is sintered, thereby forming a sintered enamel coating on the surface of the substrate. This kind of black glaze coating has a certain absorpti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D5/00B05D5/06B05D7/14B05D7/24
Inventor 修大鹏周吉学赵国辰张素卿马百常
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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