Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Depositing predominantly single metal or alloy coating on...
Patent
1995-01-09
1996-06-18
Niebling, John
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Depositing predominantly single metal or alloy coating on...
205 73, 205104, 205115, 205131, 205151, 205206, 205210, C25D 518
Patent
active
055274455
ABSTRACT:
A process for repairing degraded sections of metal tubes, such as heat exchanger tubes, by in situ electroforming utilizes a 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 10-60%. 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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