筛选可应用于铸铁材料的气相缓蚀剂，是铸铁文物保护的一种有效方法。运用失重试验对四种常见气相缓蚀剂乌洛托品、苯甲酸钠、苯并三氮唑(BTA)和碳酸环己胺(CHC)作用于铸铁材料的气相缓蚀效果进行了检测评价，并通过电化学方法研究了铸铁材料在这几种缓蚀剂作用下在氯化钠溶液中的电化学行为。结果表明，碳酸环己胺作为一种混合型的缓蚀剂，其挥发性好，诱导期短，对铸铁材料的气相缓蚀效果良好，可单独作为铸铁材质的气相缓蚀剂使用。

Screening efficient volatile corrosion inhibitors is an effective way to protect cast iron relics. Weight-loss methods was introduced to evaluate the most effective volatile corrosion inhibitor from methenamine, sodium benzoate, BTA and CHC. Electrochemical methods were used to study the electrochemical behavior of cast iron in NaCl solution with different volatile corrosion inhibitors. The results show that, as a mixed inhibitor, CHC had good volatility and short induction period. It had perfect corrosion inhibition, so it could be used as volatile corrosion inhibitor for cast iron.