List of compatible metals

Fight galvanic corrosion! Don't use dissimilar metals in an electrolytic solution! What's an electrolytic solution? Well, in the long enough term, water or even damp air (particularly if you're dealing with pipes that remain cool and encourage condensation). What's a dissimilar metal? The good people at Jamestown Distributors have provided a list. If the metals are close by in the list, they're okay together, if not, don't use (or insulate. Or there's the option of provided a sacrificial chunk of metal but I don't know the technicalities.). For the homeowner? This is important when you're dealing with water pipes, window frames, gutters, flashing and exhausts, anytime you've got metal outside the house.

Mercury Monel Nickel Bronze (silicon) Copper Brass (red) Bronze (phosphor) Tin Lead Steel (stainless) Iron Steel (mild) Aluminum Cadmium Galvanized (iron and steel) Zinc Magnesium