Procedure for sealing leaks in closed cooling systems

Coating processes – Restoring or repairing – Metal article

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21 27R, 252 72, 427437, 427438, 106 33, C09K 312, B32B 1500

Patent

active

039476103

ABSTRACT:
Leaks in closed cooling systems containing an aqueous medium as the coolant, are sealed by electroless deposition of a metal or metal containing compound from a water soluble, easily reducible metal compound. A complexing agent may be added to the coolant to assist in solubilizing the easily reducible metal compound. In one embodiment, the reducible metal compound is formed in situ by attacking the conduit walls of the cooling system so as to form solubilized compounds, or compounds which can be solubilized by addition of suitable complexing agents.

REFERENCES:
patent: 3532519 (1970-10-01), Hirohata et al.
patent: 3709712 (1973-01-01), Rossman
patent: 3850657 (1972-09-01), Bodmer et al.

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