To coat a metal with a protective oxide layer by using electrical current, making it more resistant to corrosion.
From anode + -ize (verb-forming suffix). The metal being treated becomes the anode in an electrolytic cell.
Anodizing is why your iPhone or MacBook doesn't rust or scratch as easily as bare aluminum would—Apple pioneered this in consumer tech, turning an industrial coating process into a status symbol of durability and design!
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