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Process for preparing anti-wear, anti-corrosion nano composite epoxy zinc-enriched paint

An epoxy zinc-rich coating and nano-composite technology, applied in epoxy resin coatings, coatings, etc., can solve the problems of decreased coating resistance, poor adhesion between coating and substrate, loss of substrate protection, etc., to reduce defects. The effect of forming, improving comprehensive performance and simple process

Inactive Publication Date: 2009-03-18
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the classical coating corrosion failure mechanism, there are usually three forms of coating corrosion failure in corrosive media: one is that the adhesion between the coating and the substrate is poor, and it falls off; the other is that the coating itself is exposed to acid, alkali, salt and other media. Third, there are defects in the coating (such as pinholes) or poor impermeability of the coating, such as Na+, Cl- plasma can diffuse through, so that the resistance of the coating is greatly reduced and localized corrosion
At home and abroad, there is still a lack of relevant reports on the use of nanocomposite powder technology to improve the seawater corrosion resistance and scratch resistance of traditional epoxy zinc-rich coatings. This invention attempts to fill this gap

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take titanium oxide with an average particle size of 30nm, and use an organic surface treatment agent sodium laurate to coat it. The dosage is 1% of the weight of nano-powder titanium oxide. First, take a small amount of epoxy resin and add a certain amount of treated titanium oxide particles. and disperse in a sand mill to prepare a slurry; after fully mixing the slurry with the original epoxy zinc-rich coating body, a nano-composite epoxy zinc-rich coating is obtained, and the addition of titanium oxide is 2% of the coating weight. The paint was uniformly rolled on the hot-dip galvanized steel plate, and after drying at room temperature, the coating film sample A was obtained. Reserved for performance evaluation tests.

Embodiment 2

[0017] Take titanium oxide with an average particle size of 30nm, and use organic surface treatment agent sodium laurate to coat it. The dosage is 3% of the weight of nano-powder titanium oxide. First, take a small amount of epoxy resin and add a certain amount of treated titanium oxide particles. and disperse in a sand mill to obtain a slurry; after fully mixing the slurry with the original epoxy zinc-rich coating body, a nano-composite epoxy zinc-rich coating is obtained, and the addition of titanium oxide is 3% of the coating weight. The paint was uniformly rolled on the hot-dip galvanized steel plate, and after drying at room temperature, the coating film sample B was obtained. Reserved for performance evaluation tests.

Embodiment 3

[0019] Take titanium oxide with an average particle size of 30nm, and use organic surface treatment agent sodium laurate to coat it. The dosage is 3% of the weight of nano-powder titanium oxide. First, take a small amount of epoxy resin and add a certain amount of treated titanium oxide particles. and disperse in a sand mill to obtain a slurry; after fully mixing the slurry with the original epoxy zinc-rich coating body, a nano-composite epoxy zinc-rich coating is obtained, and the addition of titanium oxide is 4% of the coating weight. The paint was evenly rolled on the hot-dip galvanized steel plate, and after drying at room temperature, the coating film sample C was obtained. Reserved for performance evaluation tests.

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Abstract

The present invention discloses the preparation process of antiwear, anticorrosive nanometer composite epoxy zinc-enriched paint. The repair paint has organic surfactant coated nanometer level functional powder in 2-15 wt% added, and the nanometer level functional powder is one or two selected from titania, silica, zinc oxide, nickel oxide, alumina, chromium oxide, manganese oxide and barium sulfate. The nanometer level powder is first dispersed in small amount of epoxy resin through ball milling, sand grinding or high speed emulsification to form slurry, and the slurry is then mixed with the main epoxy zinc-enriched paint component to obtain the antiwear, anticorrosive nanometer composite epoxy zinc-enriched paint. The coating of the composite epoxy zinc-enriched paint has high anticorrosive performance and high scratch resistance.

Description

technical field [0001] The invention relates to a preparation method of an epoxy resin-based coating composition, and more specifically relates to a preparation method of an epoxy zinc-rich coating added with nano functional powder. Background technique [0002] The ocean is a very corrosive environment. Almost all parts of marine engineering facilities and marine ships need anti-corrosion protection. Therefore, the scope of marine anti-corrosion coatings is very wide, and they all belong to the category of heavy-duty anti-corrosion coatings, such as anti-rust Primer, hull paint, deck paint, interior cabin paint, container paint, seaport facilities and platform paint, oil tank paint, seawater cooling pipeline and offshore oil pipeline paint, etc. Zinc-rich coatings are currently one of the hot spots in marine engineering protective coatings. The earliest zinc-rich paint was invented by Australian Victov Nightingale in the 1930s, an inorganic zinc-rich paint prepared by addi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/12
Inventor 钟庆东施利毅方建慧张剑平张文涛孙健
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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