A kind of long-acting anti-corrosion coating that can be thickly coated and cured under water and its preparation method

Abstract

The present invention relates to the technical field of chemical materials, in particular to a long-acting anti-corrosion coating that can be thickly coated and cured underwater and a preparation method thereof. Parts include: epoxy resin, glycidyl ether, perfluorinated silane, carboxylic acid amide liquid, epoxy silane coupling agent, barium petroleum sulfonate, nano fumed silica, additives, fillers; component B includes: Curing agent, aminosilane coupling agent, carboxylic acid amide solution, nano fumed silica, defoamer. The long-acting anti-corrosion coating that can be thickly coated and cured under water provided by the invention is a solvent-free epoxy coating, which has excellent hydrophobic drainage and water displacement, can be solidified underwater, and can also be applied on wet and rusty surfaces. Thixotropy, with wet rust and underwater curing, it can be thickly coated, and the thickness of one coat can reach 800um. It has high adhesion and excellent anti-corrosion performance. It can be used for long-term anti-corrosion underwater, which is convenient for the maintenance of underwater steel structure facilities.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a long-acting anti-corrosion coating capable of thick coating and curing underwater and a preparation method thereof. Background technique [0002] With the improvement of comprehensive national strength and the rapid development of science and technology, the country pays more and more attention to the utilization rate of offshore resources and the improvement of transportation facilities. The number of offshore drilling platforms, offshore platforms, offshore wind power, cross-sea bridges and other facilities continues to increase. These The facility is in a C5 highly corrosive environment and has been severely corroded by seawater for a long time, requiring regular maintenance. [0003] At present, the service time of many Hebo and offshore steel structure facilities in the country has expired, and regular maintenance and repairs are required. Since these facilities...

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Problems solved by technology

[0007] Chinese Patent No. CN 109280464 A, published on January 29, 2019, discloses a special waterproof and anti-corrosion coating for underwater use and its production method and construction process. E-type epoxy resin, epoxy furan resin, and underwater curing The special curing agent is a film former, dioctyl phthalate or dioctyl adipate is a plasticizer, nano-silica is a reinforcing agent, and aluminum tripolyphosphate is an active pigment to prepare a quick-drying underwater Curing coating, which is mainly used for waterproofing and repairing of buildings. The production process needs to be matured for 8 to 10 hours and needs to be ground. The construction process requires three coats, which is not conducive to the maintenance of underwater facilities.

[0009] The above-mentioned patented technologies all have excellent underwater curing properties, but they do not involve underwater thick coating curing, which causes certain difficulties in construction and maintenance. It can be seen that the preparation of certain technical means can be carried out with rust in underwater environments or humid environments. Thick coating and curing, providing long-term protection and easy production and construction, and easy engineering of solvent-free underwater curing coatings are very necessary

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