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High-corrosion-resistant water soluble zinc aluminium multielement alloy-based nano anticorrosion paint as well as preparation method and application thereof

A multi-element alloy and anti-corrosion coating technology, which is applied in the direction of anti-corrosion coatings, coatings, devices for coating liquid on the surface, etc., can solve the problem that the corrosion resistance and hardness are not as good as Dacromet, and the corrosion resistance of coatings is reduced. , the medium is difficult to disperse and other problems, and achieve the effects of good wind erosion resistance, high corrosion resistance, and strong salt spray corrosion resistance

Inactive Publication Date: 2013-08-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding hard nanoparticles can increase the hardness of the coating, but with the increase of the added amount, the nanoparticles are easily agglomerated under the action of their surface energy, and it is difficult to disperse in the medium. The agglomerated nanoparticles have a splitting effect on the matrix. Will reduce the corrosion resistance of the coating
[0006] Although the research of chromium-free Dacromet has achieved some results, the corrosion resistance and hardness and scratch resistance of the existing chromium-free Dacromet are still inferior to Dacromet. Therefore, it is necessary to develop an environmentally friendly high corrosion resistance High hardness metal powder sintered coatings that can provide cathodic protection for metal substrates are of great significance

Method used

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  • High-corrosion-resistant water soluble zinc aluminium multielement alloy-based nano anticorrosion paint as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1. Take a certain amount of γ-glycidyl etheroxypropyltrimethoxysilane and dissolve it in water-methanol solution. After ultrasonic dispersion at room temperature, add a certain amount of nano powder, stir and heat to a certain temperature. After a period of constant temperature, Suction filtration, drying in a vacuum drying oven at 60° C., and grinding to obtain modified nanopowder with an average particle size of about 40 nm.

[0044] 2. Back up according to the following mass percentage content: 15%Al-Zn-4%Si alloy powder: 30wt%, modified Al 2 o 3 Nano powder: 2wt%, γ-glycidyl etheroxypropyl trimethoxysilane: 10wt%, ethylene glycol: 12wt%, chelating phosphate titanium coupling agent: 0.5wt%, Tween-20: 3.6wt% %, sodium phosphomolybdate: 1.0 wt%, lanthanum nitrate 0.8%, quaternary ammonium titanate: 3 wt%, hydroxyethyl cellulose 0.4%; isooctyl diethylhexanol about 0.1%; ionized water. Among them, the 10%Al-Zn-Si%Mg alloy powder is in the form of scales, with a diam...

Embodiment 2

[0051] 1. Take a certain amount of γ-glycidyl etheroxypropyltrimethoxysilane and dissolve it in water-methanol solution. After ultrasonic dispersion at room temperature, add a certain amount of nano powder, stir and heat to a certain temperature. After a period of constant temperature, Suction filtration, drying in a vacuum oven at 60°C, and grinding to obtain modified nanopowder with an average particle size of about 45 nm.

[0052] 2. Back up according to the following mass percentage content: 30%Al-Zn-2.5%Mg alloy powder: 20wt%, modified Al 2 o 3 and TiO 2 (where Al 2 o 3 : TiO 2 The mass ratio is 1:1~3) Nanopowder: 1wt%, β-(3,4-epoxycyclohexyl) ethyltrimethoxysilane: 5wt%, ethylene glycol: 8wt%, composite phosphate monoalkane Oxygen titanate: 1.5wt%, Tween-20: 1.8wt%, lanthanum nitrate: 0.9wt%, modified sodium silicate 0.5%, quaternary ammonium titanate: 3wt%, hydroxyethyl cellulose 0.5 %; about 0.05% isooctyl alcohol diethylhexanol; the balance is deionized water....

Embodiment 3

[0059] 1. Take a certain amount of β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane and dissolve it in water-methanol solution, after ultrasonic dispersion at room temperature, add a certain amount of nano powder, stir and heat to a certain temperature , after constant temperature for a period of time, suction filtration, drying in a vacuum drying oven at 60°C, and grinding to obtain modified nanopowder with an average particle size of about 50nm.

[0060] 2. Backup according to the following mass percentage content: 55Al-Zn-1%Mn-4.0%Ti -1.6%Ce alloy powder: 15wt%, modified SiC and Al 2 o 3 Nano powder (where SiC: Al 2 o 3 The mass ratio is 1:1~3) 0.5wt%, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane: 5wt%, ethylene glycol: 6wt%, chelating phosphate titanium coupling Agent: 1wt%, OP-10: 2wt%, zirconium nitrate 0.6wt%, sodium phosphomolybdate: 0.8wt%, quaternary ammonium titanate: 1wt%, hydroxyethyl cellulose 0.65%; Base hexanol is about 0.05%; the balance is deionized water. ...

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Abstract

The invention discloses a high-corrosion-resistant water soluble zinc aluminium multielement alloy-based nano anticorrosion paint as well as a preparation method and application thereof and belongs to the technical field of metal surface anticorrosion paints. The high-corrosion-resistant water soluble zinc aluminium multielement alloy-based nano anticorrosion paint comprises the following components in percentage by weight: 15-30wt% of Zn-Al-based multielement alloy powder, 0.5-2wt% of modified nano powder, 2.5-20wt% of methyl alcohol, 6-12wt% of sintering protective agent, 0.5-1.5wt% of titanate coupling agent, 1.8-3.6wt% of non-ionic surface active agent, 0.9-1.8wt% of corrosion inhibitor, 1-3wt% of adhesive force enhancer, 0.4-0.65wt% of thickener, 0.05-0.1wt% of defoaming agent and the balance of deionized water, wherein the Zn-Al-based multielement alloy powder is in a scale shape, the scale diameter is less than 20 micrometers, and length-diameter ratio is more than 30. The high-corrosion-resistant water soluble zinc aluminium multielement alloy-based nano anticorrosion paint is more uniform in Zn-Al element distribution in micro scale and has high corrosion resistance, wear resistance and erosion resistance.

Description

[0001] technical field [0002] The invention relates to a high-corrosion-resistant water-based zinc-aluminum multi-element alloy-based nanometer anti-corrosion coating and its preparation method and application, belonging to the technical field of metal surface anti-corrosion coatings. Background technique [0003] Dacromet, also known as zinc-chromium coating, originated in the 1960s and was invented by Diamond Shamrock Company of the United States. It is a coating with high corrosion resistance. Compared with traditional electro-galvanizing, hot-dip galvanizing and other processes, this technology has the characteristics of less environmental pollution, good protection performance, no hydrogen embrittlement, high temperature resistance, etc., and is called the "green production" technology of surface treatment. But strictly speaking, Dacromet is not a complete "green product", because the main raw material in Dacromet coating is chromic anhydride, which plays the role of ...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/12C09D5/10B05D3/02
Inventor 蒋穹缪强仝飞魏小昕梁文萍徐一任蓓蕾
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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