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Preparation method of calcium ion exchange type aluminosilicate anticorrosive and anticorrosive paint

An aluminosilicate, anti-corrosion and anti-rust technology, used in alkali metal silicate coatings, anti-corrosion coatings, silicates, etc. The effect of stable basic structure, low price, high efficiency and corrosion resistance

Inactive Publication Date: 2012-03-28
JIANGSU RONGCHANG NEW MATERIAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these anti-rust coatings not only contain a large amount of organic solvents, but also contain many toxic substances, such as red lead, chromate pigments and other heavy metal-containing anti-rust pigments such as chromium, which cause great harm to the environment and humans. With the development of the times, it is inevitable that this kind of pigment will be replaced by a new type of non-toxic anti-corrosion (rust) pigment
[0004] At present, there are two types of anti-rust pigments that are more eye-catching. One is the phosphate system pigment represented by zinc phosphate, which has been widely used as a white pigment that does not contain harmful substances such as lead and chromium. However, zinc phosphate is a typical The acidic insoluble salt, its antirust effect is mainly achieved by dissolving a small amount in water, releasing cations and anions with antirust effect, the low solubility and acidic effect make the antirust level that it can achieve is not high ;Another new type of antirust pigment that has received attention is the ion exchange pigment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh about 10g of attapulgite, add 200ml of saturated sodium chloride solution, react in a boiling water bath, stop stirring after 1h, let it settle and filter, wash with deionized water, centrifuge for 20min, add saturated chlorine to the precipitate again Sodium chloride solution for reaction, so repeated 3 times to get sodium attapulgite.

[0018] Add 100 ml of 0.5 mol / L ammonium chloride solution to the obtained sodium attapulgite, boil in a boiling water bath for 20 minutes, settle and filter, wash with deionized water, and centrifuge for 20 minutes to obtain ammonium attapulgite.

[0019] Add the ammonium-type attapulgite to saturated lime water, boil in a boiling water bath for 24 hours, let it settle and filter, centrifuge in a centrifuge for 10 minutes, wash and dry at 100°C for 3 hours to obtain calcium-exchanged zeolite. The exchange volume is 14.69%.

Embodiment 2

[0021] Weigh about 10g of feldspar, add 200ml of 0.5mol / L sodium nitrate solution, react in a boiling water bath, stop stirring after 3 hours, let it settle and filter, wash with deionized water, centrifuge for 30min, and add the precipitate again Sodium nitrate solution for reaction, so repeated 3 times to get sodium feldspar.

[0022] Add 100 ml of 1 mol / L ammonium nitrate solution to the obtained sodium-type feldspar, boil in a boiling water bath for 30 minutes, settle and filter, wash with deionized water, and centrifuge for 30 minutes to obtain ammonium-type feldspar.

[0023] Add saturated lime water to the obtained ammonium feldspar, boil in a boiling water bath for 36 hours, settle and filter, centrifuge in a centrifuge for 20 minutes, wash and dry for 3 hours to obtain calcium-exchanged feldspar with a calcium ion exchange capacity of 15.53 %.

Embodiment 3

[0025] Weigh about 10g of zeolite, add 300ml of saturated sodium chloride solution, react in a boiling water bath, stop stirring after 4 hours, let it settle and filter, wash with deionized water, centrifuge for 20min, and add the precipitate to the sodium chloride solution again The reaction was repeated four times to obtain sodium zeolite.

[0026] Add 100 ml of 1 mol / L ammonium nitrate solution to the obtained sodium zeolite, boil in a boiling water bath for 30 minutes, settle and filter, wash with deionized water, and centrifuge for 20 minutes to obtain ammonium zeolite.

[0027] Add saturated lime water to the obtained ammonium-type zeolite, boil in a boiling water bath for 48 hours, settle and filter, centrifuge in a centrifuge for 20 minutes, wash and dry for 3 hours to obtain calcium-exchanged zeolite with a calcium ion exchange capacity of 20.79%.

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Abstract

The invention provides a non-toxic and anticorrosive paint which is environment-friendly, free of heavy metal, good in anticorrosive effect, and low in cost of raw materials, and has cation exchange property and acid corrosion resistance. The paint comprises calcium exchange aluminosilicate which has anticorrosive effects and belongs to the series of anticorrosive (antirust) paint, wherein the aluminosilicate is an artificially or naturally-synthesized compound which has a certain microcellular structure, absorbability and ion exchange property, the compounds comprise feldspar, kaolin, zeolite, montmorillonite, bentonite, sodalite, mica and the like, and the sodium ion exchange reaction, the ammonium ion exchange reaction and the calcium ion exchange reaction are performed to the compounds so as to prepare calcium exchange aluminosilicate ion exchange type anticorrosive (antirust) paint. The anticorrosive paint which is good in saline water resistance is prepared in cooperation with water-based or solvent-based film-forming materials, addition agent, and the like.

Description

technical field [0001] The invention relates to non-toxic anti-corrosion pigments and coatings, belonging to the technical field of chemical coatings, in particular to a heavy metal-free, environmentally friendly, non-toxic, high-efficiency and cheap ion-exchange anti-corrosion coating and a preparation method thereof. Background technique [0002] Metal materials are the foundation of human material civilization, and metal corrosion has caused huge losses to human society. Today there are many ways to protect metals from corrosion, one of the most effective and commonly used methods is to apply anti-corrosion coatings on metal surfaces. Anti-corrosion and anti-rust pigments play a very important role in anti-corrosion coatings, and the effect on metal protection depends largely on the selected pigments, so it is very important to choose which anti-corrosion and anti-rust pigments. [0003] The traditional anti-corrosion and anti-rust pigments used in the early days have e...

Claims

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Application Information

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IPC IPC(8): C09D1/04C09D5/08C01B33/26C01B33/40
Inventor 侯翠红常春陈群乔琳庆杨帆黄顺道
Owner JIANGSU RONGCHANG NEW MATERIAL TECH
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