5种抛光方法对钴铬烤瓷合金抗腐蚀性能的影响  

Effect of five polishing methods on the corrosion resistance of cobalt-chromium ceramic alloy

作　　者：童新文[1] 许才明[2] 施巧蕊[3] 郑明[1] 程辉[1] 

机构地区：[1]福建医科大学附属口腔医院修复科口腔生物力学及美学研究中心,福建福州350002 [2]福建出入境检验检疫局检验检疫技术中心 [3]福建医科大学附属口腔医院特诊科口腔生物力学及美学研究中心

出　　处：《广东牙病防治》2015年第5期260-264,共5页Journal of Dental Prevention and Treatment

基　　金：福建省卫生厅青年科研课题(2012-2-58);福建省自然科学基金项目(2011J01168);福建省卫生系统中青年骨干人才培养项目(2013-ZQN-ZD-23)

摘　　要：目的研究5种抛光方法对钴铬烤瓷合金抗腐蚀性能的影响。方法制作30个钴铬烤瓷合金试样,随机分为5组,分别采用砂纸、金相布轮、橡皮轮、电解和化学方法进行抛光,测量试样的表面粗糙度。用浸泡实验检测试件在腐蚀液中浸泡后Co、Cr离子的析出量,并用扫描电镜观察试样浸泡前后的表面形貌。结果电解抛光会破坏钴铬烤瓷合金试样,终止后续浸泡实验;化学抛光组表面粗糙度最大,为(0.35±0.09)μm,与其他组差异有统计学意义(P<0.05)。腐蚀液浸泡7 d后,金相布轮抛光组试件Cr析出量最小,为(0.47±0.17)μg/cm2;化学抛光组试件Cr析出量最最多,为(2.34±0.76)μg/cm2,差异有统计学意义(P<0.05)。扫描电镜观察腐蚀液浸泡前的试件,金相布轮抛光和橡皮轮抛光可获得光滑表面,砂纸抛光和化学抛光后表面划痕明显;腐蚀液浸泡后各组表面划痕没有显著变化。结论钴铬烤瓷合金采用金相布轮和橡皮轮抛光可获得较好的表面形貌和抗腐蚀性能,化学抛光对钴铬烤瓷合金表面形貌改善不大,其抗腐蚀性能最差。Objective To evaluate the effect of five different polishing methods on the corrosion resistance of cobalt- chromium （Co-Cr） ceramic alloy. Methods Thirty cobalt-chromium ceramic alloy specimens were prepared and divided into five groups randomly. Five different polishing methods as followings was used in each group respectively, including abrasive paper, metallographic, rubber wheel, electrolytic and chemical polishing. The surface roughness of specimens was tested. The ion element release of Co, Cr was analyzed by immersing test. The surface morphology was observed by scanning electron microscope （SEM） before and after immersion. Results Electrolytic polishing would destroy the spec- imens and the immersion test was terminated subsequently. Specimens polished by chemically got the roughness surface which was （0.35 ± 0.09 ）μm, there was significant differences when compared with other groups （ P 〈 0.05 ）. After im- mersing for 7 days, the metallographic group reached the lowest amount release of Cr which was （0.47 ± 0.17）μg/cm2, and the chemical group got the highest one which was （2.34 ±0. 76） μg/cm2, there was a significant difference between these two groups （P 〈 0. 05）. SEM results showed that metallographic and rubber wheel polishing methods smooth the specimens, while abrasive paper and chemical polishing methods got the opposite results. Immersion had little effect on the improvement of the scratch in the surface . Conclusion The metallographic and rubber wheel polishing may provide more smooth surface and corrosion resistance for cobalt-chromium ceramic alloy. While the chemical polishing have little effect on the improvement of surface morphology and was vulnerable for corrosion

关 键 词：工艺学 牙科 牙科合金 腐蚀 钴铬烤瓷合金 常用抛光方法 表面粗糙度 离子析出 

分 类 号：R783.2[医药卫生—口腔医学]