Surface pretreatment:
Thoroughly clean the surface of the substrate to remove impurities such as oil stains, rust, dust, etc. Chemical cleaning, mechanical polishing, and other methods can be used. For example, for steel surfaces, first wipe off oil stains with organic solvents, and then remove rust layers and increase surface roughness through sandblasting treatment to enhance the adhesion between the coating and the substrate.
Depending on the substrate material and coating type, special treatments such as surface activation may be required, such as phosphating treatment before coating some aluminum alloys.
Construction process control:
If organic high-temperature resistant coatings are applied by brushing, spraying, or other methods, the temperature and humidity of the construction environment should be strictly controlled. Generally, the temperature should be between 5-35 ℃ and the relative humidity should not exceed 85%; At the same time, multiple applications should be carried out according to the specified coating thickness requirements, ensuring sufficient drying time after each layer of application to avoid defects such as sagging and cracking caused by excessive coating thickness.
For the construction of inorganic coatings or metal alloy coatings such as thermal spraying, it is necessary to accurately control the spraying parameters, such as spraying distance, spray gun angle, spraying pressure, powder particle size, etc., to ensure that the coating is uniform, dense, and has good bonding with the substrate.
Curing and post-processing:
According to the coating product manual, curing treatment should be carried out. Some organic coatings need to be cured at room temperature, while others need to be heated and baked for curing. It is necessary to ensure that the curing time and temperature meet the specified standards, so that the coating can be fully crosslinked and cured, forming good performance.
After curing, appropriate post-treatment can be carried out as needed, such as grinding and polishing the coating surface to achieve the required surface smoothness and accuracy requirements; Some coatings may also require sealing treatment to improve their corrosion resistance and other properties.
Coating quality inspection and maintenance:
Use professional testing equipment and methods to inspect the quality of coatings, such as using an adhesion tester to test the adhesion between the coating and the substrate, using a thickness gauge to measure whether the coating thickness meets the requirements, using a hardness tester to test the coating hardness, etc., to ensure that the coating quality is qualified before being put into use.
Regularly inspect and maintain the coating during use, observe for peeling, cracking, discoloration, and other phenomena. For problematic coatings, repair or re apply them in a timely manner to ensure their continuous protection against high temperatures.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150K. 
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.