银币变色机理研究进展

中国腐蚀与防护学报, 2011, 31(3): 165-172.

银币变色机理研究进展

1.1. 大连海事大学腐蚀控制与电化学工程研究所大连 1160262. 昆明理工大学冶金与能源工程学院昆明 650093>

1.1. Institute of Corrosion Control and Electrochemical Engineering, Dalian Maritime University, Dalian 1160262. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming,650093>

基金项目: 国家高技术研究发展计划项目（2009AA05Z120）资助

关键词：银币 , tarnish , corrosion media , environmental factor , corrosion product

PROGRESS OF TARNISH MECHANISM FOR SILVER COIN

LIANG Chenghao , YANG Changjiang , HUANG Naibao , JIN Guangming , PAN Shu

Keywords： silver coin , 变色 , 腐蚀介质 , 环境因素 , 腐蚀产物

银币的锈斑、变色问题是世界性难题,至今没有清晰的成因解释。本文综述了银币变色状况和变色的机理研究进展。重点评述了腐蚀介质对银变色的影响，包括氧、硫化氢、单质硫和二氧化硫的影响；简要介绍了环境湿度、温度、光照等环境因素对银变色的影响；对银币的大气腐蚀产物进行了分析，并展望了研究的发展方向。

Rust spots and tarnish on the surface of silver coin were the two major issues in the world and neither one had been explained clearly. This article was to summarize the research progress of silver coin tarnish and its mechanism in recent years. The overview focused on the effect of corrosion media including oxygen, hydrogen sulfide, sulfur and sulfur dioxide on silver tarnish. At one time, the effect of environmental factors, such as ambient humidity, temperature, illumination, etc., was also introduced. The corrosion products on the surface of silver coin in atmospheric environment were analyzed and the outlook of anti-tarnish for silver coin was proposed.

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