Aluminium
A Spanish scientific report from 2001 claimed that the fungus Geotrichum candidum eats the aluminum in compact discs. The better studied bacterium Pseudomonas aeruginosa and the fungus Cladosporium resinae are commonly found in aircraft fuel tanks that use kerosene-based fuels, and laboratory cultures can decompose aluminum. However, these types of bacteria do not eat the aluminum; but rather, the metal is corroded by microbe waste products.