Black oxide

Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder.^[1] It is used to add mild corrosion resistance, for appearance, and to minimize light reflection.^[2] To achieve maximal corrosion resistance the black oxide must be impregnated with oil or wax.^[3] One of its advantages over other coatings is its minimal buildup.^[2]

^ Black Oxide for Non-Ferrous Metals, archived from the original on 2010-01-23, retrieved 2009-09-03
^ ^a ^b Oberg, Erik Oberg; E. Green, Robert (1996). Machinery's handbook : a reference book for the mechanical engineer, designer, manufacturing engineer, draftsman, toolmaker, and machinist (25th ed.). New York: Industrial Press. p. 1444. ISBN 9780831125752.
^ Oberg, Erik Oberg; E. Green, Robert (1996). Machinery's handbook : a reference book for the mechanical engineer, designer, manufacturing engineer, draftsman, toolmaker, and machinist (25th ed.). New York: Industrial Press. p. 1442. ISBN 9780831125752.

[1] Black Oxide for Non-Ferrous Metals, archived from the original on 2010-01-23, retrieved 2009-09-03

[mh1444-2] Oberg, Erik Oberg; E. Green, Robert (1996). Machinery's handbook : a reference book for the mechanical engineer, designer, manufacturing engineer, draftsman, toolmaker, and machinist (25th ed.). New York: Industrial Press. p. 1444. ISBN 9780831125752.

[mh1442-3] Oberg, Erik Oberg; E. Green, Robert (1996). Machinery's handbook : a reference book for the mechanical engineer, designer, manufacturing engineer, draftsman, toolmaker, and machinist (25th ed.). New York: Industrial Press. p. 1442. ISBN 9780831125752.

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