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:
Aug. 13, 1985
Filed:
Dec. 05, 1983
Robert E Fishter, Boca Raton, FL (US);
Paul L McDaniel, Hobe Sound, FL (US);
Stephen W Tefft, Houston, TX (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
Chemical milling of the commercial gamma-gamma prime nickel superalloy IN-100 is carried out by using an aqueous solution comprised of 32.5-85 volume percent HCl, with other ingredients proportioned on the HCl, preferably 40 ml/l nitric acid, 0.0141 M/l metal sulfate ion, 0.0326 M/l metal chloride ion, 0.0168 M/l alkali metal ion and 0.0073 M/l citric acid. The chemical milling is particularly effective in uniformly removing a small amount of surface layer without any deleterious attack. It hereby is useful to improve the effectiveness of surface penetrant inspection, to find small flaws which would otherwise be concealed by a worked surface layer.