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:
Nov. 15, 1983
Filed:
Nov. 24, 1982
Donald R Zaremski, Cheswick, PA (US);
Allegheny Ludlum Steel Corporation, Pittsburgh, PA (US);
Abstract
A process is provided for removing an oxide scale from the surface of a metal article and a process for the manufacture of metal articles which controls oxide scale formation and descaling thereof. A process includes providing an oxygen content of the thermal treatment atmosphere of at least 3.0%, by volume, after hot and cold forming to control the oxide scale formed. The descaling process includes immersing the article in an electrolyte of an aqueous solution of at least one neutral salt from the group consisting of the chloride, sulfate and nitrate of an alkali metal or ammonium, adjusting and maintaining a pH of 2.0 to 3.5 and passing a low density electric current through the immersed article. The article has an oxide scale substantially equivalent to an oxide scale formed at least in part in an oxidizing atmosphere of at least 3.0% oxygen, by volume. The processes may include the step of immersing in a mild acid solution to substantially remove the scale.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile