BLUING

Bluing

Bluing is a passivation process in which steel is partially protected against rust, and is named after the blue-black appearance of the resulting protective finish. True gun bluing is an electrochemical conversion coating resulting from an oxidizing chemical reaction with iron on the surface selectively forming magnetite, the black oxide of iron. Black oxide provides minimal protection against corrosion, unless also treated with a water-displacing oil to reduce wetting and galvanic action. A distinction can be made between traditional bluing and some other more modern black oxide coatings, although bluing is a subset of black oxide coatings.

The above text is a snippet from Wikipedia: Bluing (steel)
and as such is available under the Creative Commons Attribution/Share-Alike License.

bluing

Noun

  1. A substance used in laundry to whiten clothes; blue
  2. Any of several processes to protect steel against rust

Verb

bluing



The above text is a snippet from Wiktionary: bluing
and as such is available under the Creative Commons Attribution/Share-Alike License.

Need help with a clue?
Try your search in the crossword dictionary!