The service life of high-temperature resistant coatings is affected by various factors, and it is difficult to give an exact fixed duration. The following are the approximate service life of different types of high-temperature resistant coatings in common application scenarios:
Organic silicon based high-temperature resistant coating
General situation: In a normal industrial environment, when constructed according to specifications and applied within a suitable temperature range (such as 200 ℃ -600 ℃), and exposed to relatively mild external factors such as corrosive media, the service life can usually reach about 3-5 years.
Influencing factors and changes: For example, in petrochemical enterprises, if there are many highly corrosive chemicals in the environment where the equipment is located, such as acidic gases containing sulfur and chlorine, it may accelerate the aging and corrosion of the coating, shortening its service life to 2-3 years; If the operating environment of the equipment is good, the temperature fluctuation is small, and the protective measures are in place, the service life of the coating may be extended to 5-8 years.
Ceramic based high-temperature resistant coating
General situation: Ceramic based high-temperature resistant coatings, due to their excellent high-temperature resistance, wear resistance, chemical stability and other characteristics, can have a service life of 5-10 years or even longer in high-temperature and harsh working conditions such as aerospace engine thermal components and metallurgical industry high-temperature furnaces.
Influencing factors and changes: However, if the coating is subjected to frequent thermal shocks during use, such as frequent starting and stopping of aircraft engines, resulting in thermal stress inside the coating, or being washed away by hard particles carried by high-speed airflow, it may also cause problems such as peeling and cracking of the coating, thereby shortening its service life, which may be reduced to about 3-5 years.
Metal based high-temperature resistant coating
General situation: When applied to high-temperature metal components such as gas turbine blades and high-temperature valves, their service life is approximately 4-8 years under normal operating conditions.
Influencing factors and changes: When the environment in which the component is located is highly oxidizing, or when there is a corrosive medium at high temperatures, the metal based coating will accelerate oxidation and corrosion, leading to a decrease in its performance and a possible reduction in its service life to 3-6 years; If maintenance measures such as anti-oxidation and anti-corrosion are taken for the components, the service life of the coating is also expected to be extended to 8-10 years.
Carbon based high-temperature resistant coating
General situation: Graphite coatings can work stably at higher temperatures in a non oxidizing atmosphere. In some applications such as mechanical seals and mold demolding, if the working conditions are relatively stable, the service life can reach 3-5 years. Diamond like coating is used for cutting tools and other applications, with a normal lifespan of approximately 2-4 years.
Influencing factors and changes: However, if carbon based coatings are subjected to external impacts or friction beyond their tolerance limit during use, or are exposed to unfavorable environments such as strong oxidizing substances, they will wear and fail quickly. For example, graphite coatings may have a significantly shortened lifespan of 1-2 years due to oxidation in high-temperature environments with oxygen, while diamond-like coatings may have a shortened lifespan of less than 1 year when cutting high hardness materials if cutting parameters are unreasonable and tool wear is exacerbated.

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