THE REMOVAL OF CORROSION PRODUCTS ON EXCAVATED METAL ARTIFACTS USING CHELATING AGENT

使用螯合剂去除出土金属文物上的腐蚀产物

基本信息

批准号：
05835026
负责人：
KAWAMOTO Kozo
金额：
$ 1.28万
依托单位：
Gangoji Institute for Research of Cultural Property
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05835026/
关键词：
chelating agent EDTA ultra-violet spectroscopy corrosion products copper alloy artifact impregnation and coat fluorolefin acryl copolymer removal of corrosion products 青銅除錆

项目摘要

1. Selection of Chelating agentWe had first compared EDTA-3Na and NTA-2Na on the market of wide use. Both solution are almost neutral and have the same effect of removing corrosion products on copper alloy objects. We chose EDTA-3Na, because the solution of NTA-2Na slightly stimulated the skin, and continued our study.2. Removal of chelating agent from treated objectsAfter several time of washing with standing and flowing distillled water, the agent was not detectable by ultra-violet spectroscopy. But in a few cases new corrosion products appeared on the treated surface. We thought they were changed sensitive by the treatment and tried to stabilize the corrosion.3. Adequate quantity of chelating agentDuring treatment, we measured solution within the measurement limits by UV spectroscopy showed the degree of reaction. When the solution was regulated to react 0.3 to 0.5 mol of copper ion per mol of EDTA-3Na, we treated them quickly and economically.4. Stabilization of the surface of treated objects.Generally most of new corrosion products on the bronze objects treated by chelating agent are stabilized by benzotriazole (BTA).In case that it should not work, we examined the objects impregnated and coated with fluorolefin acryl copolymer under high humidity conditions. This resin has high effectiveness to shut off oxygen and vapor, and yet is easily solved by solvent after treatment.5. Removal of corrosion products from iron objects.We applied above agent to iron objects. The layr of corrosion products which is already fragile is easily removed by mechanical methods. Chelating agent does not help much than the usual mechanical removal methods.

1。螯合特工的选择首先在广泛使用市场上比较了EDTA-3NA和NTA-2NA。两种溶液几乎都是中性的，并且在铜合金对象上除去腐蚀产物具有相同的作用。我们之所以选择EDTA-3NA，是因为NTA-2NA的溶液略微刺激了皮肤，并继续我们的研究。2。从处理后几次用静电和流动的蒸馏水洗涤后从处理的对象中除去螯合剂，无法通过超紫色光谱检测到该试剂。但是在少数情况下，新的腐蚀产物出现在处理的表面上。我们认为它们因治疗而改变了敏感，并试图稳定腐蚀3。我们通过紫外线光谱法在测量极限内测量了足够数量的螯合剂处理处理，显示了反应程度。当溶液被调节以每摩尔EDTA-3NA反应0.3至0.5 mol的铜离子时，我们在经济上快速和经济处理了它们。4。稳定处理的对象的表面。在通常的大多数新的腐蚀产物中，由螯合剂处理的青铜物体上的大多数新腐蚀产物都被苯并三唑（BTA）稳定。在较高的湿度条件下，我们检查了被氟烯烯烃丙烯酸丙烯酸丙烯酸蛋白丙烯酸酯丙烯酸丙烯酸丙烯酸酯覆盖并覆盖的物体。该树脂具有很高的有效性可以关闭氧气和蒸气，但是在处理后溶剂很容易解决。5。从铁对象中除去腐蚀产物。我们将上述代理应用于铁对象。通过机械方法可以很容易地去除已经脆弱的腐蚀产物的外行。螯合剂没有比通常的机械去除方法的帮助。