A substance, such as rust, formed by corroding.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "corrosion" in a sentence
"With the rainy season, connections all along the cable need to be checked, and replaced if any water or corrosion is noted."
"If little or no corrosion is found, vehicles will be treated with an anti-corrosive compound."
"The CPSC continues to investigate long-term corrosion on electrical and fire safety components and plans to report its findings this fall."