To improve the service life of organic silicon high-temperature resistant coatings, the following key aspects can be addressed:
Prepare the surface of the substrate well
Cleaning treatment: Thoroughly remove oil stains, dust, rust, and other impurities from the surface of the substrate. Organic solvent wiping, alkali washing, acid washing, and other methods can be used to ensure surface cleanliness and avoid impurities affecting the adhesion of the coating, thereby extending the service life of the coating. For example, for oil stains on the surface of steel substrates, organic solvents such as gasoline and acetone can be used for wiping and cleaning to remove the oil stains before subsequent treatment.

Roughening treatment: By sandblasting, grinding, and other methods, the roughness of the substrate surface can be increased. For example, sandblasting treatment can be used to make the substrate surface meet the Sa2.5 standard. This can increase the contact area between the coating and the substrate, make the coating better adhere to the substrate, reduce the possibility of coating peeling off during use, and effectively extend the effective protection time of the coating.

Optimize coating formula and selection
High quality resin selection: Priority should be given to selecting organic silicon resin with high purity, reasonable molecular weight distribution, and better heat resistance as the film-forming material. Its silicon oxygen bond stability and other properties are superior, which can better maintain the structural integrity of the coating at high temperatures, thereby improving the coating's resistance to high temperatures and extending its overall service life.

Reasonable combination of pigments and fillers: Adding high-temperature resistant pigments and fillers such as aluminum powder, mica powder, ceramic micro powder, etc. can not only improve the heat resistance of the coating, but also enhance the coating's covering power, corrosion resistance, etc. For example, mica powder can form a sheet-like structure in the coating, which acts as a barrier to heat transfer and corrosion from corrosive media, helping to extend the service life of the coating.

Adaptive functional additives: Add appropriate amounts of antioxidants, UV absorbers, and other additives. Antioxidants can slow down the oxidation rate of coatings at high temperatures, while ultraviolet absorbers can reduce the destructive effect of ultraviolet radiation on coatings in outdoor environments, allowing coatings to maintain good performance in complex environments and play a protective role for a longer period of time.
Strictly control the construction process

Control the construction environment: During construction, it is necessary to ensure that the environmental temperature and humidity are suitable. Generally, the substrate temperature is required to be at least 3 ℃ higher than the dew point temperature, but not higher than 60 ℃. At the same time, the relative humidity of the air should be controlled within an appropriate range (usually below 85%) to avoid problems such as bubbles, sagging, and poor drying of the coating, ensuring the quality of the coating and laying the foundation for extending its service life.

Ensure uniform coating thickness: According to the design requirements, use appropriate construction methods (such as airless spraying, air spraying, brushing, etc.) to ensure uniform coating thickness and meet the specified thickness standards. Thin coatings do not provide good protection, while thick coatings may cause excessive internal stress, incomplete drying, and other problems, which will affect the service life. Generally, the dry film thickness should be controlled between 100-200 microns.

Ensure sufficient curing: Strictly follow the requirements of the coating for curing treatment, whether it is natural curing at room temperature or heating baking curing, it is necessary to ensure sufficient curing time and suitable curing temperature, so that the coating can fully crosslink and form a stable structure, and improve its durability in high temperature environments.
Maintain during use

Regular inspection: Regularly inspect the appearance of equipment or components coated with organic silicon high-temperature resistant coating, check for any abnormal conditions such as cracking, peeling, discoloration, etc., promptly identify problems, and evaluate whether repair or protective measures are needed.

Timely repair: Once small areas of damage, such as local peeling, scratches, etc., are found in the coating, they should be repaired in a timely manner. Suitable repair coatings can be used to repair according to the correct construction process to prevent further expansion of the damaged area and avoid premature exposure of the substrate to harsh environments, thereby extending the overall service life of the coating.

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