Cladding Alloys for Fluoride Salt Compatibility Final Report

Muralidharan, Govindarajan ; Wilson, Dane F ; Santella, Michael L ; Holcomb, David Eugene

Oak Ridge National Laboratory

关键词: Fluoride Salt Compatibility;    Welding Cladding;    Alloys;    Fluorides;    Corrosion Protection;   

DOI  :  10.2172/1006466
RP-ID  :  ORNL/TM-2010/319
RP-ID  :  DE-AC05-00OR22725
RP-ID  :  1006466

美国|英语

来源: UNT Digital Library

【 摘 要 】

This interim report provides an overview of several candidate technologies for cladding nickel-based corrosion protection layers onto high-temperature structural alloys. The report also provides a brief overview of the welding and weld performance issues associated with joining nickel-clad nickel-based alloys. From the available techniques, two cladding technologies were selected for initial evaluation. The first technique is a line-of-sight method that would be useful for coating large structures such as vessel interiors or large piping. The line-of-sight method is a laser-based surface cladding technique in which a high-purity nickel powder mixed into a polymer binder is first sprayed onto the surface, baked, and then rapidly melted using a high power laser. The second technique is a vapor phase technique based on the nickel-carbonyl process that is suitable for coating inaccessible surfaces such as the interior surfaces of heat exchangers. The final project report will feature an experimental evaluation of the performance of the two selected cladding techniques.