School of Archaeology, University of Oxford, Oxford, OX1 3TG, UK.
Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford, OX1 3TA, UK.
Sci Rep. 2022 Oct 6;12(1):14521. doi: 10.1038/s41598-022-17902-9.
We analysed corrosion from a copper bowl dating from the Roman period (43-410 AD) found in a farm in Kent, UK. Despite its relatively good condition, the interior and exterior surface of the object had areas of deterioration containing green and brown-coloured corrosion which were sampled for characterization by a multi-analytical protocol. Basic copper chlorides atacamite and paratacamite were identified in the context of mineral phases along with chlorobenzenes in the green corrosion. Chlorobenzenes are common soil contaminants in rural areas from the use of pesticides, many of which were banned more than 50 years ago. Here we show that their presence is associated with accelerated corrosion, and this provides a threat to the preservation of archaeological metal objects in the ground.
我们分析了在英国肯特郡一个农场发现的一个来自罗马时期（公元 43-410 年）的铜碗的腐蚀情况。尽管这个铜碗保存状况相对较好，但它的内外表面都有一些腐蚀区域，这些区域的腐蚀物呈绿色和棕色，我们对其进行了多分析协议的特征分析取样。在矿物相的背景下，鉴定出了基本的铜氯化物——氯铜矿和副氯铜矿，以及绿色腐蚀物中的氯苯。氯苯是农村地区使用农药造成的常见土壤污染物，其中许多农药在 50 多年前就被禁止使用了。在这里，我们表明它们的存在与加速腐蚀有关，这对埋在地下的考古金属文物的保存构成了威胁。
