High-temperature thermal-insulation anticorrosive nano coating and its preparing method

Abstract

The invention discloses a kind of new industry dope. It comprises such materials as 95 - 105 weight shares of Component A, and 1 - 3 weight shares of Component B; thereinto, Component A is made from following weight percents of materials: cementing agent 30-60%, pigment 12 - 30%, filling agent 10 - 30%, auxiliary agent 0.1 - 5%, compound nanometer dispersing agent 5 - 15% and solvent 10 - 25%; Component B is comprised of catalyzed membrane forming agent - nanometer Sb2O3 and mixed organic solvent carriers. The invention firstly brings nanometer Sb2O3 into high temperature heat preservation dope as catalyzer in dope membrane forming process. The dope of the invention has following advantages: it has high temperature heat preservation and heavy anticorrosion performances, and the coat has good acid resistance, alkali resistance, salt mist resistance, oil resistance, chemical reagent resistance, waiting resistance and ultraviolet resistance; it has excellent fire protection and waterproof performance; the clinging strength of smearing membrane is good, membrane forming speed is fast, and performance is stable.

Description

technical field [0001] The invention relates to a coating, in particular to a high-temperature thermal insulation and anti-corrosion nano coating and a preparation method thereof, belonging to the field of chemical industry. Background technique [0002] High-temperature thermal insulation coatings are widely used in many industries such as petroleum, chemical industry, metallurgy, electric power, thermal power, machinery, construction, etc., but problems such as high-temperature oxidation and corrosion are common in use. In order to solve this problem, domestic and foreign scholars have carried out a lot of research since the 1970s, and have launched many successful products successively. However, the film-forming process of these coatings is relatively complicated, such as magnetron sputtering, arc spraying, and plasma spraying, which are expensive. At the same time, most products do not have the functions of high temperature resistance, high-efficiency heat preservation ...

AI Technical Summary

Problems solved by technology

However, the film-forming process of these coatings is relatively complicated. If magnetron sputtering, arc spraying, and plasma spraying are required, the cost is expensive.

At the same time, most products cannot have the functions of high temperature resistance, high-efficiency heat preservation and heavy anti-corrosion at the same time. For example, coatings made of organic silicon and floating aluminum powder can withstand high temperatures, but in acidic environments, the coating film is easily corroded.

Since the 1990s, with the application of nano-materials, paint workers began to try to introduce nano-materials into coatings. However, due to the large specific surface energy of nano-materials, they are easy to agglomerate, so it is not easy to disperse evenly. high requirements

[0003] Most traditional thermal insulation coatings choose to add inorganic thermal insulation materials with low density such as sepiolite and perlite powder, and realize their thermal insulation effect through the significant resistance to heat transfer of objects. The heat preservation effect is remarkable, but the heat transferred by radiation (especially at high temperature) often cannot achieve a good heat preservation effect