Method of Extracting Hexavalent Chromium
AssigneeHideo Yoshida
InventorsHideo Yoshida, Morihisa Shindo
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Abstract
Hexavalent chrome is extracted from a film on a workpiece which film contains hexavalent chrome and reduced by contacting the contacting workpiece with a liquid or fine particle reducing agent.
Claims12
A method of treating a workpiece, comprising contacting a workpiece having a film comprising hexavalent chrome with a liquid or fine particle reducing agent and extracting the hexavalent chrome from said film.
A method of treating a workpiece, comprising contacting a workpiece having a film comprising hexavalent chrome with a liquid or fine particle electrolyte and applying a positive or negative voltage to said workpiece while said workpiece is in contact with said electrolyte and extracting the hexavalent chrome from the film.
(canceled)
Dependencies are inferred from the claim text.