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. 26, 2008
Filed:
Apr. 25, 2003
Applicants:
Kiyoshi Yamauchi, Kure, JP;
Fumio Manabe, Kure, JP;
Inventors:
Kiyoshi Yamauchi, Kure, JP;
Fumio Manabe, Kure, JP;
Assignee:
Babcock-Hitachi K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 1/68 (2006.01);
U.S. Cl.
CPC ...
Abstract
To provide a method for simply and easily causing only IGSCC to initiate and grow in a specimen, which can retain corrosion resistance through passivation, under atmospheric pressure in a short time, an aqueous solution of potassium tetrathionate is brought into contact with the specimen capable of retaining corrosion resistance through passivation. The potassium tetrathionate concentration, temperature and pH value of the aqueous solution are from 0.3 to 6 wt. %, from 5 to 60° C., and from 3 to 6, respectively.