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:
Mar. 31, 1992
Filed:
Feb. 08, 1991
LeRoy E Dastolfo, Lower Burrell, PA (US);
John E Mrozinski, Natrona Heights, PA (US);
Aluminum Company of America, Pittsburgh, PA (US);
Abstract
A substantially nitrate-free solution for milling products of refractory metals, especially titanium, which solution comprises: (a) about 5-100 g/l of ammonium bifluoride; (b) up to about 90 g/l of hydrochloric acid; and (c) a balance of water and impurities. Preferred embodiments of this aqueous solution consist essentially of about 15-75 g/l of NH.sub.4 HF.sub.2 and about 8-70 g/l of HCl. An alternative embodiment includes up to about 170 g/l of H.sub.2 O.sub.2. There is further disclosed a method for chemically milling, etching and/or pickling metal products, such as titanium alloy forgings, with the aforementioned solutions.