When choosing different high-temperature resistant coating products for different materials, it is necessary to consider multiple factors comprehensively. The following are some common materials and corresponding selection points:
Metal materials (such as steel, aluminum alloy, etc.)
Steel:
High temperature usage scenarios and temperature range: If used in ordinary industrial furnaces with temperatures around 500 ℃ -800 ℃, high-temperature resistant coatings based on organic silicon resin can be selected. These coatings can adhere well to steel surfaces in this temperature range, playing a role in oxidation resistance and corrosion prevention. If the temperature can reach 1000 ℃ or even higher in higher temperature environments, such as in some areas of the steel metallurgy industry, ceramic coatings are suitable. Ceramic coatings mainly composed of alumina, zirconia, etc. have excellent high-temperature resistance, can withstand high temperatures for a long time, have high hardness, wear resistance, and can effectively protect the steel substrate.
Working environment characteristics: If steel products are exposed to high temperature environments with chemical corrosive media (such as acidic and alkaline environments), in addition to considering high temperature resistance, attention should also be paid to the chemical corrosion resistance of coatings. For example, phosphate ceramic coatings have good resistance to acid and alkali while possessing certain high temperature resistance, making them suitable for steel protection in such complex environments.
aluminium alloy:
Temperature and coefficient of thermal expansion matching: Due to the relatively large coefficient of thermal expansion of aluminum alloys, when selecting high-temperature resistant coatings, the compatibility between the coating and its coefficient of thermal expansion should be considered to avoid coating peeling due to the large difference in expansion or contraction between the two during temperature changes. Organic silicon aluminum powder paint is a good choice as it can adapt to the thermal properties of aluminum alloys and provide good protection for aluminum alloys within a certain high temperature range (such as 300 ℃ -500 ℃), preventing oxidation and discoloration of aluminum alloys at high temperatures.
Influence on substrate performance: Some aluminum alloys are used in aerospace and other fields, and it is necessary to ensure that the coating does not excessively affect their lightweight, high-strength and other properties. At this time, some lightweight inorganic coatings, such as boride coatings, provide high-temperature protection while having a relatively small impact on the performance of the aluminum alloy substrate.
Ceramic materials (such as alumina ceramics, silicon nitride ceramics, etc.)
Alumina ceramics:
Requirement for improving high-temperature performance: Alumina ceramics already have good high-temperature resistance, but if you want to further improve their thermal shock resistance, corrosion resistance, etc. at ultra-high temperatures (such as above 1500 ℃), you can choose to coat their surface with rare earth oxide coatings, such as yttrium oxide coatings, which can enhance the stability of ceramics in extreme high-temperature environments and prevent cracking caused by thermal stress.
Function expansion: If you want to give alumina ceramics a certain thermal insulation function, you can use aerogel coating. Aerogel has extremely low thermal conductivity, which can enable ceramics to achieve good thermal insulation effect at high temperatures after coating, and expand its application scenarios, such as in the field of high-temperature thermal insulation.
Silicon nitride ceramics:
High temperature strength maintenance: In high-temperature and high stress application scenarios such as high-temperature engines, in order to ensure that silicon nitride ceramics can maintain high strength continuously in the range of 1000 ℃ -1400 ℃, silicon carbide coatings can be used. Silicon carbide coatings have good chemical compatibility with silicon nitride ceramics, which can strengthen the ceramic surface, improve its load-bearing capacity and wear resistance, and ensure its reliability in high-temperature working environments.
Antioxidant protection: Silicon nitride ceramics may undergo oxidation at high temperatures in aerobic environments. To avoid this, a silicon boron nitrogen coating can be applied, which can form a dense protective film at high temperatures, preventing oxygen from further contacting the ceramic substrate and maintaining its stable performance.
Composite materials (such as carbon fiber reinforced composites, etc.)
Carbon fiber reinforced composite materials:
Bonding with substrate: The surface of this type of material is relatively special, and the coating needs to be able to bond well with it to avoid delamination during high-temperature use. For example, by using polyimide coating, it can have good adhesion with carbon fiber composite materials, and in the high temperature range of 300 ℃ -400 ℃, it can protect the structural integrity of the composite material and prevent problems such as matrix decomposition caused by high temperature.
Weight reduction considerations: As composite materials are commonly used in fields with strict weight requirements (such as aerospace), lightweight coatings should be selected as much as possible when choosing coatings, such as some nanoscale ceramic coatings, which can ensure high temperature resistance without significantly increasing the weight of composite materials and meet their protection needs in high temperature environments.
In short, the selection of high-temperature resistant coatings should be based on multiple factors such as the characteristics of the material itself, the high-temperature environment in which it is used, whether there are special functional requirements, and the impact on the performance of the substrate, in order to select the most suitable product.

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