aluminium conservation
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Answer:
Aluminium
Most aluminium objects found in museum collections will be alloys containing copper as a minor component. The addition of only 3 % (by weight) of copper trebles the mechanical strength of the parent metal.
As aluminium corrodes the oxide layer that forms protects the surface against further corrosion. Under normal environmental conditions the metal does not corrode to any great extent.
Deterioration
If allowed to come into contact with metals such as copper and iron, or in the presence of chloride ions (such as found in sea water), aluminium and its alloys corrode appreciably.
Do not allow aluminium to come into contact with mercury as mercury prevents formation of the protective oxide patina, promoting rapid corrosion of the aluminium.
Preventive Conservation
Apply the guidelines described in the general introduction to this chapter to aluminium and its alloys.
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