Galvanic corrosion

Corrosion of an iron nail wrapped in bright copper wire, showing cathodic protection of copper; a ferroxyl indicator solution shows colored chemical indications of two types of ions diffusing through a moist agar medium

Regular maintenance checks discovered that the Statue of Liberty suffered from galvanic corrosion

Aluminum anodes mounted on a steel-jacketed structure

Galvanic corrosion is an electrochemical process in which one metal corrodes preferentially to another when both metals are in electrical contact, in the presence of an electrolyte. This same galvanic reaction is exploited in primary batteries to generate an electrical voltage.

单词	Galvanic action
释义	Galvanic action 英语百科 Galvanic corrosion Galvanic corrosion is an electrochemical process in which one metal corrodes preferentially to another when both metals are in electrical contact, in the presence of an electrolyte. This same galvanic reaction is exploited in primary batteries to generate an electrical voltage.
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Galvanic action

Galvanic corrosion