Corrosion resistance of plasma sprayed NiCrAl+(ZrO_2+Y_2O_3) thermal barrier coating on 18-8 steel s

• 作 者: 陈飞 吕涛 丁华东 周海 刘凯
• 机 构: School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, Chi
• 出 处: Journal of Central South University of Technology(English Ed
• 发表日期: 2005年S2期
• 关键词: magnetism plasticity saturated welding TBCs primer adopt acetone body

The corrosion resistance of NiCrAl+(ZrO_2+Y_2O_3)thermal barrier coating, formed with the plasma spraying technique, on the 18[CD*2]8 steel surface was investigated. The phase structure and morphology of the coating were analyzed by means of X-ray diffraction(XRD) and scanning electron microscopy(SEM). The electrochemical corrosion behavior of the coating in 1.0mol/L H_2SO_4 solution was studied by using electrochemical measurement methods. The results show that the gradient plasma spraying coating is composed of the NiCrAlY primer coating and the (ZrO_2+Y_2O_3 ) top coating, and the coating thickness is 360μm. The microhardness of coating reaches 1100HV. The corrosion resistance of the plasma sprayed coating of the 18[CD*2]8 steel surface is about 5 times as great as that of the original pattern. The corrosion resistance of the coating is enhanced notably.

The corrosion resistance of NiCrAl + (ZrO 2 + Y_2O_3) thermal barrier coating, formed with the plasma spraying technique, on the 18 [CD * 2] 8 steel surface was investigated. The phase structure and morphology of the coating analyzed by means of X- ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochemical corrosion behavior of the coating in 1.0 mol / L H 2 SO 4 solution was studied by using electrochemical measurement methods. The results show that the gradient plasma spraying coating is composed of the NiCrAlY The microhardness of coating reaches 1100HV. The corrosion resistance of the plasma sprayed coating of the 18 [CD * 2] 8 steel surface is about 5 times as great as that of the original pattern. The corrosion resistance of the coating is enhanced notably.