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首页> 外文期刊>Applied Surface Science >Investigations of corrosion phenomena. on gold coins with SIMS
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Investigations of corrosion phenomena. on gold coins with SIMS

机译：调查腐蚀现象。在SIMS金币上

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In order to establish a new handling. procedure for contaminated coins, the Coin Cabinet and the Conservation Science Department of the Kunsthistorisches Museum, Vienna, initiated a research project on corrosion effects of gold coins. By now, investigations on historic and contemporary coins included optical microscopy, scanning electron microscopy (SEM), Auger electron microscopy (AES), X-ray photoelectron microscopy (XPS), and electrochemical methods showing the distribution of pollutants.This work focuses on secondary ion mass spectrometry (SIMS) investigations merely showing the distribution of electronegative elements, such as sulfur, oxygen, and chlorine on the surface. Sulfur is highly suspected of causing the observed corrosion phenomena, and is indeed enriched near polluting splints. Since SIMS is a destructive method, the investigated samples are test coins with intentionally added impurities. These coins were manufactured in cooperation with the Austrian Mint. They were treated with potassium polysulfide (K2Sx) for 8 h gaining a rapid corrosion of the surface.SIMS mass spectra, depth profiles, and images were done (a) at non-polluted areas, (b) near polluted areas with slight coloring, and (c) directly at polluting stains showing enrichments of sulfur and chlorine. Due to the success of these investigations further studies on historic coins are intended. (c) 2005 Elsevier B.V. All rights reserved.
机译：为了建立新的处理方式。维也纳艺术史博物馆的硬币柜和保护科学部发起了一项针对被污染硬币的程序，发起了一项关于金币腐蚀作用的研究项目。到目前为止，对历史和当代硬币的研究包括光学显微镜，扫描电子显微镜（SEM），俄歇电子显微镜（AES），X射线光电子显微镜（XPS）和显示污染物分布的电化学方法。离子质谱（SIMS）研究仅显示了表面上负电性元素（如硫，氧和氯）的分布。高度怀疑硫会引起观察到的腐蚀现象，并且确实在污染夹板附近富集了硫。由于SIMS是一种破坏性方法，因此研究的样本是带有故意添加的杂质的测试硬币。这些硬币是与奥地利造币厂合作制造的。他们用多硫化钾（K2Sx）处理了8小时，从而迅速腐蚀了表面.SIMS质谱，深度分布和图像（a）在无污染的区域进行，（b）在受污染的区域附近进行了轻微着色， （c）直接在污染的污渍上显示出硫和氯的富集。由于这些研究的成功，打算对历史硬币进行进一步的研究。 （c）2005 Elsevier B.V.保留所有权利。

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