<http://schema.org/description>
"Is it possible to put black oxide over cadmium plate? Will the cadmium plate be degraded by the black oxide solution? Will the black oxide solution be degraded by exposure to cadmium?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.pfonline.com/articles/black-oxide-and-cadmium-plating>