Alloy
Alloy (noun & verb) /əˈlɔɪ/
noun: a metal, e.g. brass, that consists of two or more metals mixed together – mixture of metals:
This coin is made of brass, which is an alloy consisting of zinc and copper.
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Aluminum or Alloy wheels are largely Corrosion-resistant, but prone to galvanic corrosion.
You’re correct—while aluminum or alloy wheels are generally resistant to corrosion, they can indeed be susceptible to galvanic corrosion, especially when different metals are in contact with each other in the presence of an electrolyte like water or road salt. This type of corrosion occurs because of the electrochemical reaction between the dissimilar metals.