青铜文物锈蚀机理及有害锈转化剂研究

为保护好出土青铜物，防止“青铜病”蔓延，必须除去有害锈，为此作了青铜器锈蚀机理的模拟性验证实验。依据电化学原理，经6次配方筛选和多次工艺条件试验，研制出能将青铜器中有害锈转化为无害锈的转化剂，它可特有害锈中的CT转化成Cl2、Cu^ 转化为Cu^2 和Cu，从而制止“青铜病”的蔓延。用此方法对青铜物进行保护，在大气中存放7年，至今保护完好，无锈点。

Research on erosion mechanism of bronze cultural relics and transform agent on harmful rust

The bronze cultural relics had been badly corroded by soil,water and chloride after lying underground for thousands of years and the bronze corrosion its easily spreading.Study on the phenomenon showing that,the bronze corrosion can be divided into two kinds,one is caused by oxygen or sulfur,which is steady and colorful.The other is caused by chloride,which is corrosionspreading and entering deeply into the bronze body.This is called barmful rust and should be got rid of.Protection agent for harmful erosion conversion is studied and produced.It can convert the harmful rust to harmless,and then the relics can be preserved by coated with a protecting film.This method had been used on the Western zhou bottle and Sui Dynasty mirror,which were exhibited on Guangzhou Shekou Museum.At the beginning,they were badly corroded and in a powdery state.After the protection process and stored in ordinary warehouse for 4 years,they are in good state,free of rust spot.This method also used on 49 Western Han Wuzhu Coins,which were powdery corroded,after 7 years in the air,the coins are good and free of rust spots.Reversibility test,acid resistant test,alkali resistant test,salt resistant test and harmful rust remove test are also made,showing the effectiveness of this agent. The agent consists of composite corrosion inhibitor,coupler and adhesive.It can combine with Cu + to form stable coordinated compound.When removing the harmful rust,it did not change the appearance of the protected objects.So the rust is removed and relics be protected simultaneously.The traditional techniques of mechanics and chemistry no longer needed.