银币表面非晶氧化铝抗变色保护层
Anti-tarnishing Amorphous Alumina Films on Silver Coins
摘 要
采用反应磁控溅射技术在银币表面沉积非晶氧化铝抗变色膜.采用掠入射X-射线衍射(GXRD)、X-射线光电子谱(XPS)和原子力显微镜(AFM)对薄膜结构和形貌进行了研究.沉积了氧化铝膜的银币在0.5 mol/L NaCl+10 mmol/L Na2S混合溶液中的自腐蚀电位升高,腐蚀电流密度降低.在H2S蒸汽环境中的加速实验结果表明,表面沉积了氧化铝膜的银币具有优异的抗变色性能.
非晶氧化铝
反应溅射
silver coin
amorphous alumina
active magnetron sputtering
Abstract
Amorphous alumina films were deposited on silver coin surfaces by reactive magnetron sputtering to improve the anti-tarnishing property of silver.Glance angle X-ray diffraction (GXRD),X-ray photoelectron spectoscopy (XPS) and atomic force microscopy (AFM) were used to analyze the chemical state and surface morphology of alumina films.The corrosion potential of silver coins covered with amorphous alumina was increased,and corrosion current density was decreased in 0.5 mol/L NaCl+10 mmol/L Na2S mixing solution.The accelerated test in H2S vapor showed that the alumina film had excellent anti-tarnishing properties.
中图分类号 TG174.444
所属栏目 应用技术
基金项目
收稿日期 2009/7/10
修改稿日期 2009/9/24
网络出版日期
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备注罗建军,副教授.
引用该论文: LUO Jian-jun,MA Lin,SUN Zhi-guo,TANG Guang-ze. Anti-tarnishing Amorphous Alumina Films on Silver Coins[J]. Corrosion & Protection, 2010, 31(6): 491～493
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参考文献
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【2】Praney J P,Kammlott G W,Graedel T E.The corrosion of silver by atmospheric sulfurous gas[J].Corrosion Science,1985,25(2):133-143.
【3】Kim H.Corrosion process of silver in environments containing 0.1 ppm H2S and 1.2 ppm NO2[J].Materials and Corrosion,2003,54(4):243-250.
【4】Hallett K,Thickett D,McPhail D S,et al.Application of sIMS to silver tarnish at the british museum[J].Applied Surface Science,2003,203/204:792-798.
【5】Dowsett M G,Adriaens A,Soares M,et al.The use of ultra-low-energy dunamic SIMS in the study of the tarnishing of silver[J].Nuclear Instruments & Methods in Physics Research B,2005,239:51-64.
【6】Singh I,Sabita P M,Altekar V A.Silver tarnishing and its prevention-A review[J].Anti-Corrosion,1983,30:4-8.
【7】Souza S de.Smart coating based on polyaniline acrylic blend corrosion protecting of different metals[J].Surface & Coatings Technology,2007,201:7574-7581.
【8】Evesque M,Keddam M,Takenouti H.The formation of self-assembling membrance of hexadencane-thiol of silver to provent the tarnishing[J].Electrochimica Acta,2004,49:2937-2943.
【9】Yang H,Sun Y,Ji J,et al.2-mercaptobenzothiazole monolayers on zinc and silver surface for anticorrosion[J].Corrosion Science,2008,50:3160-3167.
【10】Frey T,Kgel M.Tarnish protection of silver jewels by plasmapolymer coatings[J].Surface & Coatings Technology,2003,173/174:902-904.
【11】Farre Quattropani L,Groening P,Ramseyer D,et al.The protection of metallic archaeological objects using plasma polyer coatings[J].Surface & Coatings Technology,2000,125:377-382.
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