CAJ | 학술논문

将超声波用于镁合金表面镁铝水滑石膜(Mg6 Al2(OH)16 CO3?4H2 O)的制备，研究了超声波功率、频率对膜层结构及耐蚀性的影响规律.通过扫描电镜(SEM)和X射线衍射(XRD)分析了膜层的表面形貌和成分，利用极化曲线和交流阻抗(EIS)评价了该转化膜的耐蚀性.研究结果表明，超声辅助处理工艺能够有效地加快膜层形成，随着超声波频率和功率的提高，成膜速度提高，但过高的功率和频率会导致膜层质量的恶化，在频率为80 kHz、功率为100 W条件下制得的膜层较厚且完整，耐蚀性明显优于镁合金基体，腐蚀电流密度约为镁合金基体的1/20.
장초성파용우미합금표면미려수활석막(Mg6 Al2(OH)16 CO3?4H2 O)적제비，연구료초성파공솔、빈솔대막층결구급내식성적영향규률.통과소묘전경(SEM)화X사선연사(XRD)분석료막층적표면형모화성분，이용겁화곡선화교류조항(EIS)평개료해전화막적내식성.연구결과표명，초성보조처리공예능구유효지가쾌막층형성，수착초성파빈솔화공솔적제고，성막속도제고，단과고적공솔화빈솔회도치막층질량적악화，재빈솔위80 kHz、공솔위100 W조건하제득적막층교후차완정，내식성명현우우미합금기체，부식전류밀도약위미합금기체적1/20.
The hydrotalcite (Mg6 Al2 (OH)16 CO3?4H2 O)film was prepared on magnesium alloy by ultrasonic wave,and the effect of power and frequency of ultrasonic wave on its microstructure and corrosion resistance was also investigated.The surface morphology and phase composition were characterized using scanning elec-tron microscopy (SEM),X-ray diffraction (XRD),respectively.The polarization curve and electrochemical im-pedance spectroscopy (EIS)were applied to evaluate the anti-corrosion performance.The results show that the film formation can be significantly accelerated by ultrasonic-assisted treatment.The film forming rate increases with the ultrasonic power and frequency,while the quality of film will be deteriorated through overwork.When the ultrasonic power and frequency was 100 W and 80 kHz,respectively,a thicker and integrated layer was formed on the magnesium alloy.Its corrosion resistance was superior to that of the bare magnesium alloy,and the corrosion current density was approximately 1/20 that of the substrate.