Abstract:The sealant with corrosion resistance at high temperature was developed. The sealing test on thermal spraying coating surface was carried out using brushing and ultrasonic infiltration method. And, acid corroding experiments were carried out at room temperature and 750 ℃. The results show that the pores of the coating surface are basically sealed, sealing agents and nano-particles can penetrate into the pores of the coating, thereby reduce the porosity of the coating. The sealant can obviously reduce the porosity and shield the alkali, salty, and acid proof of the coatings, specially the thermostable corrosion property are greatly improved.
Key words:thermal spraying; sealant; porosity; corrosion at high temperature
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