摘要
采用超音速火焰喷涂(HVOF)技术在ZK60A镁合金表面沉积Fe_(78)Si_(9)B_(13)非晶涂层,对涂层的组织结构进行表征,并利用电化学动电位极化和阻抗测试研究了非晶涂层在模拟体液(SBF)中的腐蚀行为。结果表明,涂层致密均匀,与基体结合良好,非晶占比高,孔隙率小。动电位极化测试结果显示涂层腐蚀速率远低于镁合金基体,且低于骨缺损修复前两阶段的降解速率上限,阻抗谱分析结果与极化曲线对应,涂层在SBF中的耐蚀性明显高于镁合金基体。
Fe_(78)Si_(9)B_(13) amorphous coating was deposited on the surface of ZK60A magnesium alloy by high velocity oxyfuel(HVOF) thermal spraying. The microstructure of the coating was characterized, and the corrosion behavior of the amorphous coating in SBF(simulated body fluid) was investigated by electrochemical potentiodynamic polarization and impedance measurement. The results indicate that the coating presents dense and uniform with well bonding with the substrate, as well as high amorphous proportion and low porosity. The potentiodynamic polarization test results reveal that the corrosion rate of the coating is far lower than that of the magnesium alloy matrix, and lower than the upper limit of the degradation rate of the two stages before bone defect repair. The impedance spectrum analysis results coincide with the polarization curve, and the corrosion resistance of the coating in SBF is significantly higher than that of the magnesium alloy matrix.
作者
何鹏
袁子洲
张香云
张咪
He Peng;Yuan Zizhou;Zhang Xiangyun;Zhang Mi(State Key Laboratory for Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050)
出处
《特种铸造及有色合金》
CAS
北大核心
2024年第1期55-58,共4页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(52061024,52161027)
甘肃省自然科学基金资助项目(21JR7RA260)
兰州理工大学红柳优秀青年人才支持计划。
