A mid-19th century process producing a thin, non-corrosive coating of black magnetic iron oxide on article of iron and steel. The Bower-Barff process used high heat (1600 F) in a closed container to first oxidize a thin coating of red ferric oxide (Fe2O3) then later reduce it to black magnetic oxide (Fe3O4).
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Sources Checked for Data in Record
- Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
- Website address 1 Comment: The Free Dictionary at http://www.thefreedictionary.com/Bower-Barff+process