galvanic corrosion

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galvanic corrosion

[gal′van·ik kə′rō·zhən]
(metallurgy)
Electrochemical corrosion associated with the current in a galvanic cell, caused by dissimilar metals in an electrolyte because of the difference in potential (emf) of the two metals. Also known as contact corrosion.

galvanic corrosion

An electrochemical action which takes place when dissimilar metals are in contact in the presence of an electrolyte, resulting in corrosion.
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He romps through playful material (howto make a lasagna battery, and why Mentos can turn a bottle of Diet Coke into a soda geyser), and he's got a knack for nailing tough topics with clever metaphors.