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Key points for selecting high temperature resistant coatings correctly

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Consider using temperature range:
Clearly define the actual working temperature environment in which the components or equipment to be protected are located. For example, if the working temperature is between 200-600 ℃, organic silicon high-temperature resistant coatings may be a suitable choice; If the temperature exceeds 1000 ℃, coatings such as ceramic coatings and nickel based high-temperature alloy coatings can better meet the demand.
We also need to consider the frequency and amplitude of temperature changes. For situations where rapid cooling and heating occur frequently, coatings with low thermal expansion coefficients and good thermal stability (such as ceramic coatings) have more advantages.
According to the usage environment medium:
If it is in an environment with strong corrosive chemicals (such as acidic and alkaline solutions, corrosive gases, etc.), coatings with excellent corrosion resistance should be selected, such as phosphate coatings, fluororesin coatings, etc., which can be used in chemical corrosion environments. In salt spray environments such as seawater, coatings with good corrosion resistance such as zinc rich primers are more suitable.
For environments with wear risks, such as mechanical processing and mining scenarios, coatings with high hardness and strong wear resistance, such as chromium carbide coatings and ceramic coatings, are given priority consideration.
Based on the characteristics of the matrix material:
The adhesion between different substrate materials (such as metal, ceramic, plastic, etc.) and coatings varies, so it is necessary to choose coatings that can adhere well to the substrate materials. For example, on steel substrates, organic silicon coatings, zinc rich primers, etc. can adhere well; For ceramic substrates, some inorganic high-temperature adhesive coatings may have better bonding effects.
It is also necessary to consider the thermal expansion coefficient of the substrate material, and try to choose a coating with a thermal expansion coefficient similar to that of the substrate, in order to avoid problems such as coating peeling and cracking caused by thermal stress differences during temperature changes.
Based on cost and construction requirements:
From a cost perspective, organic high-temperature resistant coatings (such as silicone coatings) have relatively low costs and can be preferred in conventional industrial scenarios that meet basic high-temperature resistance and other performance requirements; Nickel based and cobalt based high-temperature alloy coatings have higher costs and are generally used in high-end fields such as aerospace that require extremely high performance.
In terms of construction convenience, coatings such as organic silicon coatings and zinc rich primers that self dry and solidify at room temperature and have relatively simple construction processes are easier to operate during large-scale construction and limited on-site construction conditions; However, some ceramic coatings may require special processes such as thermal spraying, which require high levels of expertise from construction equipment and personnel.

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

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