Something or someone that causes corrosion by eating away at or degrading materials.
From Latin 'corrodere' with the agent suffix '-er' added in English. First appeared in technical and scientific writing in the 17th century to describe both chemical substances and processes.
Salt is one of nature's most powerful corrodeers—it's why cars rust so quickly near the ocean, and why ancient civilizations valued salt as a currency; the same thing that preserves food also destroys metal!
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