Inorganic coating is an inorganic polymer coating composed of inorganic polymer, dispersed active metal, metal oxide nano-materials and rare earth ultrafine powder. It can quickly react with iron atoms on the surface of steel structure to form an inorganic polymer anticorrosive coating with both physical and chemical protection functions, which is firmly combined with the matrix through chemical bonds. No pollution to the environment, long service life and anti-corrosion performance reaching the international advanced level. It is a high-tech replacement product that meets the requirements of environmental protection. Commonly used coatings in building engineering are aqueous solution of alkali metal silicate and aqueous dispersion of colloidal silicon dioxide. Silicate and silica sol (colloidal silica) inorganic coatings can be made of the above two film-forming substances, and then pigments, fillers and various additives are added, which have good water resistance, alkali resistance, pollution resistance and gas resistance.
Inorganic coating is one of many inorganic materials. Even as far as coatings are concerned, inorganic coatings only account for a small proportion, but people should attach great importance to them. First of all, the base material of inorganic coatings often comes directly from nature, so the source is very rich. Such as silica sol, silicate solution and other coating base materials, whose main raw materials come from timely minerals, are extremely rich materials in nature. Secondly, compared with some organic paint binders, inorganic paint binders have little pollution to the environment during production and use, and most products use water as dispersion medium, which has no adverse effects on the environment and health. Thirdly, the aging resistance and some physical and chemical properties of inorganic coatings are difficult to achieve by most organic coatings with the same production cost, so they have good technical and economic properties. Fourthly, inorganic coatings are mostly alkaline, which is more suitable for construction on the basic level of cement, lime sand and so on. Moreover, they can react chemically with lime in these substrates to form calcium silicate crystals, which can form an organic whole with alkali, so the adhesion is particularly good.