Abstract

In previous work, a monomolecular lubricant layer was applied on coin blanks by a burnishing process. With this layer, not only was the die life increased three times but the coin surfaces were protected from tarnishing. In this work, a monomolecular octadecanethiol layer was applied on the surface of silver coins by ultrasonic bathing. After an organic accelerated sulfurization test, the formed self-assembled, closely packed film illustrated excellent anti-tarnish properties. With this monomolecular layer, the silver surface did not tarnish in an ambient atmosphere for years without any extra protection.

中文翻译：

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银币和银器的高级防掉漆工艺—单分子十八烷硫醇保护膜

摘要

在以前的工作中，通过抛光过程将单分子润滑剂层施加到硬币毛坯上。有了这一层，不仅模具寿命增加了三倍，而且硬币表面也得到了防锈蚀保护。在这项工作中，通过超声波浴在银币表面上涂覆了单分子十八烷硫醇层。经过有机加速硫化测试后，所形成的自组装，紧密堆积的薄膜显示出优异的抗锈蚀性能。有了这个单分子层，银表面多年来在没有任何额外保护的情况下不会在环境气氛中变色。