The anticorrosion is one of the key technologies on flue gas heat recovery using on natural gas thermal power equipment,the different anticorrosion surfaces not only have different corrosion resistance but also have different heat transfer performance.Gas-solid-liquid contact angle of anticorrosion surface is the important influence factor of condensation heat transfer.The sessile drop method and Phoenix 300 contact angle analyzer are used to test the contact angle of different coating surfaces,analyzing th...