Corrosion inhibitor mixes comprising multiple salts. One mix includes zinc citrate, zinc oxalate and magnesium phosphate. A second mix includes the same two zinc salts, nickel oxalate and nickel phosphate. Either mix may be added to a film-forming binder such as a polymer suitable for a paint or primer, to inhibit corrosion, especially when used with a metallic substrate. The resulting product of the inhibitor mix and binder is especially useful in inhibiting corrosion when applied to an aircraft surface.