Galvanic corrosion studies (1824)
Sir Humphry Davy investigated why copper sheathing on Royal Navy warships rotted quickly in seawater. He found the copper corroded electrically when coupled with other metals, establishing that corrosion could be an electrochemical process, not just a chemical one.
Davy attached zinc and iron 'protectors' to copper hulls, slowing decay in port trials.
His work launched cathodic protection, now standard for pipelines, ships, and storage tanks.
Like Davy's discovery, today's finding identifies an electrical corrosion mechanism that had not been measured before, with potential for new protection strategies.
