Hello Researcher, I have seen in the articles that to perform a hot corrosion test on the Thermal barrier coatings samples. Investigators are using 0.3mg or 0.4 some 0.8mg salt on the surface of samples. The normal temperature of heating is 920 and 970C. It's okay but some are using 300h in 920. other 250h in 920.
My question is what is the standard or best parameters to perform a hot corrosion test on ceramic-coated materials?
There isn't a universally "standard" condition for hot corrosion tests as the parameters depend on various factors such as the materials tested, the specific experimental setup, the nature of the coatings, the specific research questions or industrial conditions being simulated, and the protocols followed by different research groups or industrial bodies. Hence, the variance in test conditions you observed in the literature.
However, the parameters you provided: salt deposit in the range of 0.3mg to 0.8mg/cm^2, temperatures of 920C or 970C, and duration between 250h to 300h, appear to be within common ranges for testing the hot corrosion resistance of thermal barrier coatings (TBCs).
Generally, the salt deposit simulates the salts encountered in actual service conditions (such as sea salt or impurities in fuel for aero engines), the temperature corresponds to the typical operating temperatures of gas turbines, and the duration is selected to provide a balance between accelerated testing and mimicking long-term service exposure.
Regarding the choice of best parameters, it depends on the specifics of your case:
Therefore, it would be best to consult your research advisor or a materials scientist with experience in TBCs and hot corrosion testing to determine the optimal test parameters for your specific situation. You should also thoroughly review the relevant literature and potentially conduct preliminary experiments to optimize your test conditions.
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