十八硫醇/乙醇体系自组装膜对银的防变色作用
18 Mercaptan/ethanol System Self-assembly Membrane for Prevention of Silver Discoloration
摘 要
十八硫醇(ODT)是一种环境友好型金属处理剂。在乙醇体系中用十八硫醇在银表面制备自组装膜(SAMs)。采用加速变色、极化曲线、电化学阻抗、循环伏安等方法研究了乙醇溶液中十八硫醇自装膜对银表面的防变色作用。结果表明, 在浓度为0.05 mol/dm3, 温度为50 ℃时, 自组装最佳时间为1 h, 十八硫醇在银表面形成了一层致密的自组装膜, 该膜具有良好的防变色效果。
乙醇
自组装膜
银
防变色
18 mercaptan
ethanol
self-assembly monolayer
silver
prevention of discoloration
Abstract
18 mercaptan (ODT) is an environmental friendly metal treatment agent. Self-assembled monolayers of ODT/ethanol system adsorbed on the surface of silver were propared and the prevention against discoloration behavior of silver surface was investigated by means of accelerated discoloration experiment, polarization curve, EIS and circular voltammetric methods. The results showed that in the same experimental conditions (the concentration of 18 mercaptan was 0.05 mol/dm3 and the temperature was 50 ℃), the best self-assemlly time was 1 h, the self-assembled monolayers were compact and well prevented discoloration behavior of silver surface.
中图分类号 TG172.3 TG178
所属栏目 试验研究
基金项目
收稿日期 2011/4/3
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备注杜伟,硕士研究生,
引用该论文: DU Wei,WAN Li,DING Yi,CHEN Bu-rong,LI Jia-jia. 18 Mercaptan/ethanol System Self-assembly Membrane for Prevention of Silver Discoloration[J]. Corrosion & Protection, 2012, 33(2): 120
被引情况:
【1】王卫云,李忠芳,王素文, "香兰素缩3, 4-二氨基苯甲酸在45#钢表面的组装工艺对其缓蚀性能的影响",腐蚀与防护 34, 193-196(2013)
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参考文献
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【2】李晗晔,杨中东,闫业芹. PMTA对镀银层抗H2S腐蚀性能的研究[J]. 材料与冶金学报,2005,4(1):74-76.
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【4】杨庆峰,顾安忠,丁洁,等. Calcium Carbonate Fouling Behavior and Morpholog[J]. 化工学报,2002,53(9):924-930.
【5】Magali E,Michel K,Hisasi T. The formation of sel-assembling membrane of hexadecane-thiol on silver to prevent the tarnishing[J]. Electrochi Acta,2004,49:1937-1943.
【6】Burleigh T D,Gu Y,Donahey G,et al. Tarnish protection of silver using a hexadecanethiol self-assembled monolayer and de-scriptions of accelerated tarnish tests[J]. Corrosion, 2001,57(12):1066-1074.
【7】Jennings G K,Munro J C,Yong T H,et al. Effect of chain length on the protection of copper by n-alkanethiols[J]. Langmuir,1998,14(21):6130-6139.
【8】Jennings G K,Yong T H,Munro J C,et al. Structural effects on the barrier properties of self-assembled monolayers formed long-chainω-alkoxy-n-alkanethiols on copper[J]. J Am Chem Soc,2003,125(10):2950-2956.
【9】刘金红,顾宁. 循环伏安法研究银表面自组装膜的致密性[J]. 中国腐蚀与防护学报,2006,26(5):290-294.
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