dreyer: Welcome to our technical discussion form! With regard to your question, the influence on corrosion properties of an alloy made from two metals (as an example) can be either less resistant or more resistant, depending on the alloy and the environment. Alloys with more than one phase tend to be less resistance than single phase alloys. As an example, brasses containing >%7E15% zinc exhibit good corrosion resistance in most waters; however, they are susceptible to dezincification, and those brasses contain two phases, an alpha and a beta phase. Alloy 400 (Monel 400) is an example of an alloy that exhibits more environmental flexibility than either of its two components, i.e., copper and nickel. Part of the reason for its flexible resistance is that it is a single phase alloy. Hope this helps! David Hendrix The Hendrix Group Inc.