镀银件腐蚀变色机理及防变色方法

介绍了镀银件在大气中的变色腐蚀机理,认为大气中的硫离子对镀银件的腐蚀变色影响最大,紫外光、氧化剂和腐蚀介质等都能加速银层变色;比较了几种防银变色的方法及作用,评价了它们的防变色能力及对镀银件性能的影响,并简单介绍了双酚A型聚芳酯保护膜的合成工艺及性能特点.

Mechanism of Tarnishing of Silver Plated Wares and Strategy to Prevent It

The tarnishing corrosion mechanisms of silver plated wares in atmosphere were introduced. A comparison was made with respect to several methods to prevent silver plated coating from tarnishing and to their effectiveness and effect on the Ag coating performance as well. Moreover, the synthetic technology and properties of bi-phenol A polyaryl ester protective coating were briefed. It was pointed out that the sulfur ions in the atmosphere had the most significant effect on the corrosive tarnishing of the silver plated wares, while ultraviolet, oxidants, and corrosive mediums all contributed to accelerate the tarnishing of the silver plating.