Hope the scrapyard takes it and doesn't charge you for hazardous waste disposal.
Chromate is used, among other things, to passivate metals such as Aluminum, or I think sometimes zinc. It's nasty stuff, very poisonous, not something you want to melt or shred.
Have you ever seen your tools start to get a yellowish color, specially cheap tools? That's probably a chromate coating used to prevent oxidation.
Take it to your scrap yard, wherever it ends up will probably be a foundry that can readily deal with that type of material, as they must when dealing with scrap metals.
Scott
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