The construction process of organic high-temperature resistant coatings is generally not particularly complex, but it also needs to follow certain specifications and steps. The following is an introduction to common construction processes:
Preparation before construction
Surface treatment of substrate:
Firstly, the surface of the coated substrate should be cleaned to remove impurities such as oil stains, dust, rust, etc. For example, for metal substrates, organic solvent wiping, sandblasting, and other methods can be used to achieve a clean, dry, and rough surface of the substrate, in order to enhance the adhesion between the coating and the substrate.
For some special substrates, chemical conversion treatment may also be required, such as chromate treatment on the surface of aluminum alloys, to ensure better adhesion with coatings.
Paint preparation:
According to the product manual requirements, accurately measure the components of the coating (if it is a two-component or multi-component coating), and mix and stir them evenly according to the specified ratio. Some coatings may require the use of specialized diluents to adjust viscosity and achieve the appropriate application state. Generally, the amount of diluent added should be controlled to avoid affecting the performance of the coating.
Construction operation
Construction method selection:
Brush coating: The operation is relatively simple and suitable for coating small areas and complex shaped parts. After dipping the coating with a brush, apply it evenly on the surface of the substrate in a certain order, taking care to avoid phenomena such as sagging and missed brushing, and ensuring a certain thickness uniformity for each coating.
Spraying: High efficiency, able to obtain a relatively uniform coating, commonly used for large-area construction. Air spraying, airless spraying, and other methods can be used to adjust parameters such as the pressure of the spray gun, the distance between the nozzle and the substrate, and the spraying angle, so that the coating can atomize well and adhere evenly to the substrate. However, during the spraying process, attention should be paid to ventilation and protective measures to prevent paint mist from polluting the environment and endangering the health of operators.
Dip coating: Suitable for coating small workpieces with regular shapes and mass production. Immerse the workpiece in the prepared coating and slowly remove it after a certain period of time, allowing the excess coating to naturally flow back to the paint tank to ensure that the coating thickness is uniform and meets the requirements. However, pay attention to controlling the speed and time of immersion to avoid problems such as excessive coating thickness or bubble formation.
Coating thickness control:
Generally, multiple applications are required to achieve the specified total coating thickness. After each application, the next layer of coating should be applied after the previous layer of coating has dried or dried (according to the requirements of the coating product). The thickness of each layer of coating should be moderate. Excessive thickness may lead to long drying time, cracking, sagging and other defects, while excessive thickness may not achieve the expected high temperature resistance and protective effect. Generally, the total coating thickness of organic high temperature resistant coatings is between tens of micrometers and hundreds of micrometers.
Post construction treatment
Drying and curing:
Choose the appropriate drying and curing method according to the type of coating and the requirements of the instruction manual. Common methods include natural drying at room temperature, heating drying, etc. For example, some organic silicon high-temperature resistant coatings can be naturally cured at room temperature for a certain period of time, while others require baking at a certain temperature (such as around 100 ℃ -200 ℃) for a certain period of time to fully cure. It is necessary to strictly control the curing temperature, time, and other parameters to ensure that the coating is fully cured and achieves the best performance state.
During the drying and curing process, the construction environment should be well ventilated and clean to avoid dust and other impurities from contaminating the coating surface and affecting its quality.
quality testing:
After curing, the appearance of the coating should be inspected for defects such as bubbles, pinholes, sagging, orange peel, etc. If any defects are found, they should be repaired in a timely manner.
Professional testing methods such as adhesion testing, thickness testing, etc. can also be used to verify whether the coating meets the construction quality requirements and ensure that the coating can effectively function in high temperature environments.
Overall, as long as one is familiar with the construction process and relevant requirements, and strictly follows the steps, the construction process of organic high-temperature resistant coatings can be successfully completed. However, compared to some ordinary room temperature coatings, it still needs to be more rigorous in terms of construction parameter control and other aspects.

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