White rust

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Description

A natural white tarnish on zinc coated pieces. White rust, or zinc bloom, is composed of basic carbonate zinc carbonate, hydroxide zinc hydroxide, and oxide zinc oxide. Zinc bloom forms on metallic zinc in moist air.

Synonyms and Related Terms

zinc bloom; wet storage stain; Weirost (Deut.); ferrugem branca (Port.)

Authority

  • Richard S. Lewis, Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • ASTM, ASTM, "Standard Terminology Relating to Paint, Varnish, Lacquer and Related Products", Annual Book of ASTM Standards, Section 6, Paints, Related Coatings and Aromatics, ASTM, D16, 7-Jan, Jul-96

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