MICHAEL JAMES KIRKMAN
Pilots at 5 Ave, Kennewick, WA
License number
Washington C1046014
Category
Airmen
Address
Address
6913 W 5Th Ave, Kennewick, WA 99336
Professional information
Zirconium And Zirconium Alloy Passivation Process
US Patent:
5264109, Nov 23, 1993
Filed:
Sep 16, 1991
Appl. No.:
7/760800
Inventors:
Michael J. Kirkman - Kennewick WA
Assignee:
Siemens Power Corporation - Richland WA
International Classification:
C25D 1134
US Classification:
205212
Abstract:
A zirconium or zirconium alloy passivation process comprises providing an electrolyte which is capable of removing nickel, nickel alloys and alloys containing nickel from the surface of a zirconium or zirconium alloy article, keeping the dissolved metal in solution while simultaneously anodizing the article surfaces. Such nickel, if not removed provides a window for hydride accumulation to occur, detrimentally affecting the alloy properties when subject to a nuclear reactor environment. An article placed in the electrolyte in proximity to a cathode and connected to a power source has the trace nickel, nickel alloys and alloys containing nickel removed to background levels and reduces the potential for hydride accumulation within the article in a nuclear reactor environment, and provides for increased article life.