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Environmental protection anti-corrosion coating for water-based metal and preparation method thereof

A technology of anti-corrosion coatings and anti-corrosion pigments, applied in anti-corrosion coatings, alkali metal silicate coatings, cement coatings, etc., can solve the problems of high construction conditions, porous cured coatings, dry spray coatings, etc., and shorten the drying time. , strong adhesion, dense film effect

Active Publication Date: 2021-01-15
北京中天正源生态科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-based inorganic zinc-rich anti-corrosion coating is based on an aqueous solution of inorganic silicate, and zinc powder is used as an anti-corrosion pigment. The protective effect is achieved through the shielding and cathodic protection of the coating. The layer is more porous and brittle, and it is prone to dry spraying and coating cracking during coating, and it is prone to large-area peeling off under the action of external force, which requires high construction conditions.

Method used

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  • Environmental protection anti-corrosion coating for water-based metal and preparation method thereof
  • Environmental protection anti-corrosion coating for water-based metal and preparation method thereof
  • Environmental protection anti-corrosion coating for water-based metal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]Example 1 Preparation of loaded cerium hydroxyapatite

[0033] (1) Weigh 434.12g Ce(NO 3 ) 3 .6H 2 O is dissolved in water to make a 5% m / v aqueous solution of cerium nitrate;

[0034] (2) Weigh 3012g of hydroxyapatite powder and add it to the cerium nitrate aqueous solution of step (1) for immersion treatment for 12h. -1 Pa, dried at 40°C, and then sintered in an argon atmosphere in a tube furnace. Heating at a heating rate of 750°C, holding for 2 hours, then cooling to room temperature with the furnace, wherein the flow rate of argon gas is 0.3L / min, and the powder is obtained;

[0035] (3) Add the powder obtained in step (2) into the jet milling machine, and carry out jet milling under the protection of high-purity inert gas. Those that are sufficiently ground cannot pass through, and the jet milling is continued until the particle size of the powder is 1-5 μm, which is stirred and mixed to obtain cerium-loaded hydroxyapatite.

Embodiment 2

[0036] Example 2 Preparation of loaded cerium hydroxyapatite

[0037] (1) Weigh 712.23g Ce 2 (SO 4 ) 3 .8H 2 O is dissolved in water to make a 5% m / v aqueous solution of cerium sulfate;

[0038] (2) Weigh 4016g of hydroxyapatite powder and add it to the aqueous solution of cerium sulfate in step (1) for immersion treatment for 8 hours. -1 Pa, dried at 50°C, and then placed in a tube furnace for sintering in an argon atmosphere. Heating at a heating rate of 650°C, holding for 2 hours, then cooling to room temperature with the furnace, wherein the flow rate of argon gas is 0.5L / min, and the powder is obtained;

[0039] (3) Add the powder obtained in step (2) into the jet milling machine, and carry out jet milling under the protection of high-purity inert gas. Those that are sufficiently ground cannot pass through, and the jet milling is continued until the particle size of the powder is 1-5 μm, which is stirred and mixed to obtain cerium-loaded hydroxyapatite.

Embodiment 3

[0040] Example 3 Preparation of loaded cerium hydroxyapatite

[0041] (1) Weigh 354.56g CeCl 3 .6H 2 O is dissolved in water to make a 5% m / v cerium chloride aqueous solution;

[0042] (2) Weighing 4016g of hydroxyapatite powder and adding it to the cerium chloride aqueous solution of step (1) for immersion treatment for 6h, when the vacuum degree is lower than 10 -1 Pa, dried at 50°C, and then placed in a tube furnace for sintering in an argon atmosphere. Heating at a heating rate of 700°C, holding for 2 hours, then cooling to room temperature with the furnace, wherein the flow rate of argon is 0.6L / min, and the powder is obtained;

[0043] (3) Add the powder obtained in step (2) into the jet milling machine, and carry out jet milling under the protection of high-purity inert gas. Those that are sufficiently ground cannot pass through, and the jet milling is continued until the particle size of the powder is 1-5 μm, which is stirred and mixed to obtain cerium-loaded hydro...

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Abstract

The invention discloses an aqueous environmentally friendly anticorrosion paint for metals and a preparation method thereof. The paint comprises following components in percentage by weight: 50 to 60%of composite metal powder, 4 to 8% of rare earth metal loaded hydroxyl apatite, 30 to 40% of aqueous lithium silicate solution, 1 to 5% of antirust pigment, and 1 to 3% of auxiliary agent; wherein the rare earth metal loaded hydroxyl apatite is cerium loaded hydroxyl apatite, and the auxiliary agent is at least one of dispersant, antifoaming agent, wetting agent, and leveling agent. The providedpaint has an excellent waterproof and anticorrosion performance and characteristics of high adhesion force, easiness for construction, and excellent mechanical properties, and meets the environmentalprotection requirements.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, and in particular relates to a water-based environment-friendly anti-corrosion coating for metals and a preparation method thereof. Background technique [0002] Every year, the economic loss caused by metal corrosion is as high as 800 billion yuan, accounting for nearly 3% of my country's GDP. Similarly, developed countries such as the United States and Japan also face problems related to metal corrosion: The economic loss caused by corrosion accounts for about 1-4% of its GDP. The development and application of metal corrosion and protection technology and products have been highly valued by all parties. Among the many metal anti-corrosion measures, paint protection is by far the most common, economical and practical protection measure. Traditional anti-corrosion coatings are mostly solvent-based, containing 70-80% organic solvents, causing pollution to the environment, and mos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/04C09D1/00C09D5/10C09D7/62
CPCC09D1/00C09D1/08C09D5/084C09D5/103C09D5/106C09D7/62
Inventor 张道春刘娟陈文学
Owner 北京中天正源生态科技有限公司