Appeal No. 2004-1926
Application 09/714,670
The Handbook of Metal Treatments and Testing defines bright
annealing as “[a] term covering the annealing of any metal
whereby the component is removed from the furnace in an oxide-
free condition”, and states that “[w]hile it is sometimes
possible to produce a surface which is bright and shiny, this
criterion is not essential for the correct use of the term.
Provided the components are removed with no free scale and a
limited amount of adherent oxide, then it can be stated that the
parts have been Bright annealed.”
Zaremski discloses that heat treating operations such as
annealing “are typically performed, at least in part, in an
oxidizing atmosphere which causes an oxide scale to form on the
surface of the metal” (col. 2, lines 15-18), and that “the
present invention provides a method of descaling a metallic body
without the use of acid solutions by employing a relatively high
current density in an electrolyte consisting of an aqueous
solution containing about 15 to 20 weight percent sodium sulfate”
(col. 1, lines 39-44). Zaremski’s disclosed current density
range is 46.5 to about 310 A/dm2 (col. 3, lines 20-25).
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