Preparation method and application of intelligent anticorrosion coating
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An anti-corrosion coating and intelligent technology, applied in coatings, metal material coating processes, liquid chemical plating, etc. Cathodic reaction, low manufacturing cost, effect of protecting metal materials
Active Publication Date: 2016-09-28
JIANGSU GUGELANSHAN PROTECTIVE FACILITIES CO LTD +2
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However, the amount of nanoparticles and corrosion inhibitors consumed by the anti-corrosion c
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Embodiment 1
[0043] Step 1: Preparation of silica mesoporous microspheres (MSNs).
[0044] 1. Mix 1.0g cetyltrimethylammonium bromide (CTAB), 3.5mL 2mol / L sodium hydroxide (NaOH) solution and 480mL water, and heat to 80 under mechanical stirring (500 rpm) ℃, reflux for 1h to fully activate cetyltrimethylammonium bromide;
[0045] 2. In the mixed solution of step 1, add 5.0mL ethyl orthosilicate (TEOS) dropwise, under vigorous stirring, a white solid will form within 10 minutes. After reacting at 80°C for 2 hours, filter it while it is hot and use water and methanol to fully Wash the product and vacuum dry it at 70°C to obtain a solid;
[0046] 3. Weigh 1.0g of dry solid, ultrasonically disperse it in a mixed solution of 150mL methanol and 10mL concentrated hydrochloric acid, reflux for 6h at 65℃, centrifuge it, wash thoroughly with water and methanol successively, and dry it under vacuum at 70℃ to obtain mesoporous silica Microspheres (MSNs).
[0047] Step two: modifying the surface of the mesop...
Embodiment 2
[0063] Step 1: Preparation of silica mesoporous microspheres (MSNs).
[0064] 1. Mix 1.0g cetyltrimethylammonium bromide (CTAB), 3.5mL 2mol / L sodium hydroxide (NaOH) solution with 480mL water, and heat to 90 under mechanical stirring (500 rpm) ℃, reflux for 1.5h to fully activate cetyltrimethylammonium bromide;
[0065] 2. In the mixed solution of step 1, add 5.0 mL of ethyl orthosilicate (TEOS) dropwise, under vigorous stirring, a white solid will form within 10 minutes. After reacting at 90°C for 2.5 hours, filter while hot, and use water and methanol successively Thoroughly clean the product, vacuum dry at 70°C to obtain a solid;
[0066] 3. Weigh 1.0g of dry solid, ultrasonically disperse it in a mixed solution of 100mL methanol and 10mL concentrated hydrochloric acid, reflux at 70℃ for 4h, centrifuge, and wash thoroughly with water and methanol successively, and vacuum dry at 70℃ to obtain mesoporous silica Microspheres (MSNs).
[0067] Step two: modifying the surface of the me...
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Abstract
The invention discloses a preparation method and application of an intelligent anticorrosion coating and belongs to the field of anticorrosion protection for metal. The preparation method comprises the steps that mesoporous silicon dioxide microspheres are prepared; modified treatment is conducted on the surfaces of the mesoporous silicon dioxide microspheres; a ZrO2-SiO2 thin film doped with Ce<4+> is prepared on the surface of metal; and the mesoporous silicon dioxide microspheres adsorbing a corrosion inhibiter are mixed into sol, the surface of the ZrO2-SiO2 thin film doped with the Ce<4+> is coated with the mesoporous silicon dioxide microspheres mixed into the sol, and the anticorrosion coating is formed. When the anticorrosion coating is eroded by an NaCl solution, the doped Ce<4+> ions can be released out along with degradation of a defect position of a coating structure, and the Ce<4+> ions serving as an oxidizing agent trigger an intelligent nano container to release the corrosion inhibiter which then enters the coating, and corrosion is effectively suppressed; at the same time, a reduction product Ce<3+> of the Ce<4+> can react with hydroxyl ions gathering in a micro-cathode zone to produce ceric oxide or hydroxide which then deposits on the micro-cathode zone in a settling form; and therefore, the cathodic reaction is suppressed, and the corrosion process is slowed down.
Description
Technical field [0001] The invention relates to a preparation method of an anti-corrosion coating, in particular to a preparation method and application of an intelligent anti-corrosion coating, and belongs to the field of metal corrosion protection. Background technique [0002] According to statistics, the world's annual direct economic losses caused by metal corrosion are about 700 billion US dollars, and my country's losses due to metal corrosion account for 5% of the gross national product (GNP). A survey and analysis report of the American Society of Corrosion Engineers in 2009 pointed out that the annual direct economic loss due to corrosion accounts for about 4.27% of the gross domestic product (GDP). The corrosion of metal materials spreads across all areas of the national economy, not only causing a huge waste of resources, but also a series of social problems such as environmental pollution. The use of anti-corrosion coating to coat metal materials has the advantages ...
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