摘要
A series of plasma-sprayed Al2O3-13wt%TiO2(AT13)coatings were sealed with silicone resin by using impregnating with and without ultrasonic excitation methods,respectively.And,sealing treatments with ultrasonic excitation(UE)were performed at different temperatures.The corrosion behaviors of the sealed AT13 coatings were investigated by immersion corrosion tests.The microstructure and porosity of the coatings were characterized.The porosity of the AT13 coatings decreases after sealing treatments and the coatings sealed with ultrasonic excitation have the lowest porosity.The result of immersion corrosion in 10vol%HCl aqueous solutions shows that most of UE-sealed coatings have lower weight losses value than that of the coatings sealed by conventional impregnating(CI).The ultrasonic excitation was useful for decreasing the opposing force acting against impregnation driven by moisture and air from pores and cracks,and accelerating the fluidity of sealant,which made the sealant penetrate deeply into the inner part of pores and cracks.All the results indicate that the corrosion resistance of plasma-sprayed AT13 coatings can be effectively improved by sealing treatments with ultrasonic excitation.
A series of plasma-sprayed Al2O3-13wt%TiO2(AT13)coatings were sealed with silicone resin by using impregnating with and without ultrasonic excitation methods,respectively.And,sealing treatments with ultrasonic excitation(UE)were performed at different temperatures.The corrosion behaviors of the sealed AT13 coatings were investigated by immersion corrosion tests.The microstructure and porosity of the coatings were characterized.The porosity of the AT13 coatings decreases after sealing treatments and the coatings sealed with ultrasonic excitation have the lowest porosity.The result of immersion corrosion in 10vol%HCl aqueous solutions shows that most of UE-sealed coatings have lower weight losses value than that of the coatings sealed by conventional impregnating(CI).The ultrasonic excitation was useful for decreasing the opposing force acting against impregnation driven by moisture and air from pores and cracks,and accelerating the fluidity of sealant,which made the sealant penetrate deeply into the inner part of pores and cracks.All the results indicate that the corrosion resistance of plasma-sprayed AT13 coatings can be effectively improved by sealing treatments with ultrasonic excitation.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2012年第S1期223-227,共5页
Rare Metal Materials and Engineering
基金
Fund of Provincial Education Department,Jiangsu(JHZD09-04)
Innovative Research Fund for University Graduate,Jiangsu(2017-B0803334)
