CAJ | 학술논문

采用溶胶-凝胶法在不锈钢基体表面制备ZrO2和Al2 O3涂层,并对铝合金阳极氧化膜进行封孔处理。采用高温循环氧化法研究ZrO2和Al2 O3涂层抗高温氧化性能,通过电化学阻抗谱和剥蚀法分析溶胶-凝胶法封孔后铝合金氧化膜的耐腐蚀性能。结果表明：ZrO2和Al2 O3涂层的抗高温氧化性能随涂层厚度增加而提高；铝合金阳极氧化膜的耐腐蚀性能也随封孔次数的增加而提高,但当封孔处理超过8次后,阻抗值和腐蚀程度基本不随封孔次数发生变化；实施相同次数封孔处理后,Al2 O3溶胶的封孔效果略优于ZrO2溶胶的封孔效果。
채용용효-응효법재불수강기체표면제비ZrO2화Al2 O3도층,병대려합금양겁양화막진행봉공처리。채용고온순배양화법연구ZrO2화Al2 O3도층항고온양화성능,통과전화학조항보화박식법분석용효-응효법봉공후려합금양화막적내부식성능。결과표명：ZrO2화Al2 O3도층적항고온양화성능수도층후도증가이제고；려합금양겁양화막적내부식성능야수봉공차수적증가이제고,단당봉공처리초과8차후,조항치화부식정도기본불수봉공차수발생변화；실시상동차수봉공처리후,Al2 O3용효적봉공효과략우우ZrO2용효적봉공효과。
A sol-gel method was applied to prepare ZrO2 and Al2O3coatings on stainless steel (SS304) substrates and to seal the anodic oxidation films of an aluminum alloy. The high-temperature oxidation resistance of as-prepared ZrO2 and Al2 O3 coatings was investigated by cyclic high-temperature oxidation tests. The corrosion resistance of the sealed anodic films was investigated by electro-chemical impedance spectroscopy ( EIS) and exfoliation corrosion method. The experimental results indicate that the high-temperature oxidation resistance of the ZrO2 and Al2 O3 coatings is improved with the increasing of coating thickness, and the corrosion resistance of the sealed anodic films is also improved with the increasing times of sealing processes. However, the impedance value and corrosion degree of the sealed anodic films change slightly after more than 8 times of sealing processes. The corrosion resistance of the anodic films sealed with Al2 O3 sol performs a little better than those with ZrO2 sol with the same times of sealing processes.