Who discovered metal corrosion cells, which have been largely eliminated in modern pipelines?

Who discovered metal corrosion cells, which have been largely eliminated in modern pipelines?

• A. Luigi Galvani
• B. Alessandro Volta
• C. Michael Faraday
• D. Thomas Edison

Answer: (A)

Galvanic corrosion happens when two dissimilar metals are in an electrolyte, forming a galvanic cell where one metal (the anode) corrodes while the other (the cathode) is protected. The term galvanic cell is tied to Luigi Galvani, who first described electrical effects from the contact of different metals, laying the groundwork for recognizing metal-to-metal electrochemical interactions. That historical link is why he is identified with discovering metal corrosion cells. In modern pipelines, such corrosion is largely mitigated by protective coatings, cathodic protection, and proper isolation of different metals or assemblies. Alessandro Volta is known for the Voltaic pile (the first battery) and advancing electrochemistry, but not for discovering galvanic corrosion cells. Faraday contributed foundational electrochemistry, and Edison is associated with inventing devices rather than this specific discovery.

Galvanic corrosion happens when two dissimilar metals are in an electrolyte, forming a galvanic cell where one metal (the anode) corrodes while the other (the cathode) is protected. The term galvanic cell is tied to Luigi Galvani, who first described electrical effects from the contact of different metals, laying the groundwork for recognizing metal-to-metal electrochemical interactions. That historical link is why he is identified with discovering metal corrosion cells. In modern pipelines, such corrosion is largely mitigated by protective coatings, cathodic protection, and proper isolation of different metals or assemblies. Alessandro Volta is known for the Voltaic pile (the first battery) and advancing electrochemistry, but not for discovering galvanic corrosion cells. Faraday contributed foundational electrochemistry, and Edison is associated with inventing devices rather than this specific discovery.