| Description | All materials made from non-ferrous metals. Non-ferrous: metals, including alloys, that do not contain iron in appreciable amounts. In archaeological collections, commonly copper, lead, silver, gold and zinc. Copper alloy: metal alloy principally of copper with one or more non-ferrous metals. Bronze (tin) and brass (zinc) are types of copper alloy. Galvanic (bimetallic) corrosion: electro-chemical process where one metal corrodes preferentially when in contact with another.
This only applies to material excavated or discovered as part of a planned or amateur excavation or survey within the borough of Harrow regardless of boundary changes over time.
For more guidance see the Society of Museum Archaeology's fact sheet for metals (non-ferrous): http://socmusarch.org.uk/training/smart-project/
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