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Modified self-curing non-chromium zinc based anti-corrosive paint and preparation thereof

An anti-corrosion coating and self-curing technology, applied in anti-corrosion coatings, coatings, etc., can solve problems such as hexavalent chromium pollution in Dacromet coatings, and achieve the effects of stable solution, firm bonding and simple operation

Inactive Publication Date: 2008-12-24
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Dacromet coating still has the problem of hexavalent chromium pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation of the modified base material, by mass fraction, weighed 37.3% of silica sol (solid content 25%), 4.1% of potassium hydroxide, and 19.5% of distilled water into a three-necked flask, at a constant temperature of 50°C-60°C Stir for 10 minutes, then mix with 9.0% silicone acrylic emulsion, stir for 40 minutes, add 0.2% film-forming aid, 0.05% defoamer and 0.3% dispersant, fully stir for 60 minutes, and stand for 2 hours to obtain milky white Uniformly dispersed modified base material.

[0027] When in use, weigh scale-like zinc powder with a mass fraction of 10.0%, slowly add it to the base material while stirring, and after stirring for 50 minutes, adjust the viscosity of the paint with 19.55% distilled water, and filter it with an 80-mesh standard sieve to obtain Zinc-based anti-corrosion coatings. After the degreasing and derusting clean test piece is sandblasted, immerse in the coating solution for 1min-5min, take it out and drain naturally, and form ...

Embodiment 2

[0030] For the preparation of the modified base material, according to the mass fraction, take 40.5% silica sol, 4.3% potassium hydroxide, and 14.7% distilled water into a three-necked flask, and stir it electrically for 10 minutes at a constant temperature of 50°C-60°C, and then mix with 9.7% % silicone acrylic emulsion, electric stirring for 30 minutes, adding 0.5% film-forming aid, 0.09% defoamer and 0.5% dispersant, fully stirring for 60 minutes, standing for 2 hours, that is, a uniformly dispersed milky white silicone acrylic emulsion Modified base material.

[0031]When in use, weigh scale-like zinc powder with a mass fraction of 13.3%, slowly add it to the base material while stirring, and after stirring for 30 minutes, adjust the viscosity of the paint with 16.41% distilled water, and filter it through a 80-mesh standard sieve to obtain Zinc-based anti-corrosion coatings. After the degreasing and derusting clean test piece is sandblasted, immerse in the coating soluti...

Embodiment 3

[0034] For the preparation of the modified base material, 41.5% of silica sol, 5.1% of potassium hydroxide, and 9.42% of distilled water were added to a three-necked flask in terms of mass fraction, and stirred electrically for 10 minutes at a constant temperature of 50°C-60°C, and then mixed with Mix 10.6% silicone acrylic emulsion, electric stirring for 30min, add 0.7% film-forming aid, 0.13% defoamer and 0.65% dispersant, fully stir for 60min, let stand for 2h, that is to get evenly dispersed milky white silicone acrylic Emulsion modified base material.

[0035] When in use, weigh scale-like zinc powder with a mass fraction of 17.4%, slowly add it to the base material while stirring, and after stirring for 20 minutes, adjust the viscosity of the paint with 14.5% distilled water, and filter it with an 80-mesh standard sieve to obtain Zinc-based anti-corrosion coatings. After the degreasing and derusting clean test piece is sandblasted, immerse in the coating solution for 1m...

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Abstract

Modified self-curing anticorrosion paint without a chrome zinc group is prepared from two compositions of modified base material and pigment which are mixed. The modified base material comprises the following compositions by the following mass fraction: 37.3 to 53.6 percent of silica sol, 4.1 to 5.7 percent of caustic potash, 9.0 to 13.2 percent of silicon-acrylic latex, 0.3 to 1.0 percent of a pigment dispersant, 0.2 to 1.1 percent of a film forming auxiliary agent, 0.05 to 0.2 percent of a high-efficiency water-based paint antifoaming agent, and deionized water or distilled water serving as the rest. The pigment comprises the following compositions in mass fraction: 10.1 to 24.2 percent of scaly zinc dust. A preparation method for the modified self-curing anticorrosion paint without the chrome zinc group comprises the following steps of: preparing the modified base material; and preparing the paint. The modified self-curing anticorrosion paint without the chrome zinc group has the advantages of high corrosion resistant property, environmental protection, low energy consumption, etc.

Description

1. Technical field [0001] The invention relates to the technology of green anticorrosion paint on metal surfaces, in particular to a modified self-curing chromium-free zinc-based anticorrosion paint and a preparation method thereof. 2. Background technology [0002] Due to its good weather resistance and weldability, zinc-rich coatings have become the most common and important primer for metal surface protection, and are widely used in bridges, ships, storage tanks, oil pipelines, outdoors in atmospheric and marine environments Anticorrosion of steel structures, etc. Zinc-rich coating is a sacrificial coating. With the help of the strong activity of zinc powder, it can play a cathodic protection effect on the iron substrate. The corrosion products of zinc powder can fill the pores of the paint film and seal the damaged parts of the paint film to shield the corrosion medium. Therefore, although the zinc-rich coating is very thin, it can better prevent the corrosion of steel....

Claims

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Application Information

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IPC IPC(8): C09D183/07C09D5/08
Inventor 江静华张留艳马爱斌
Owner HOHAI UNIV
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