METAL OBJECTS

Objects of copper or copper alloys usually have corrosion in the form of Copper-I-oxide, malachite and paratacamite (Fig. 1). The concerned objects were cleaned mechanically and with alkaline chemicals. Cleaned objects with deep-penetrated corrosion were placed in moisture cabin with pressurised benzatriazole (BTA), an inhibitor passivizing the corrosion and providing longitudinal preservation. Thereafter, all the objects were applied with 3% paraloid B-72 in order to minimise the direct contact between the objects and the surrounding environment. Finally, the objects were packed together with silica gel in order to balance their moisture content and turned over to the storehouse (Fig. 2).

Menu