The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 1976
Filed:
Oct. 15, 1975
Lowell W Austin, Weirton, WV (US);
Edwin J Smith, Weirton, WV (US);
Leslie D McGraw, Weirton, WV (US);
National Steel Corporation, Pittsburgh, PA (US);
Abstract
A method for producing galvanized metal sheet or strip material having a zinc coating on one side only. The method includes immersing a strip (zinc-coated on both sides) in an electrolyte and passing it between anode means and separate cathode means so as to remove a zinc coating from one side of the strip while simultaneously depositing a substantially equivalent amount of zinc on the opposite side of the strip. The cathode means is immersed in a separate caustic catholyte solution which is kept separate from the main electrolyte by an anion exchange membrane, supported at least partly within the electrolyte, so as to prevent migration of zinc ions from the main electrolyte to the catholyte and cathode means and the formation of a deposit on the cathode means. The method is most economically performed with a steel strip having a differential coating of zinc.