Electrolysis: processes – compositions used therein – and methods – Electroforming or composition therefor – Roll – ring – or hollow body
Patent
1993-11-16
1996-05-14
Niebling, John
Electrolysis: processes, compositions used therein, and methods
Electroforming or composition therefor
Roll, ring, or hollow body
205115, 205131, C25D 102
Patent
active
055164153
ABSTRACT:
A process for repairing degraded sections of metal tubes, such as heat exchanger tubes, by in situ electroforming utilized a flexible probe containing an electrode. The probe is movable through the tube to the site of degradation and is sealed in place, thereby creating an electrochemical cell. Electrolyte flows from a reservoir through the cell and a structural layer of metal is deposited on the tube using a pulsed direct current and a duty cycle of 10-40%. The metal layer so formed possesses an ultrafine grain size preferably with a highly twinned microcrystalline structure giving the layer excellent mechanical properties.
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Brennenstuhl Alexander M.
Gonzalez Francisco
Lichtenberger Philip C.
Palumbo Gino
Mee Brendan
Niebling John
Ontario Hydro
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