C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
134/35, 31/51
C23F 11/08 (2006.01) C02F 5/14 (2006.01)
Patent
CA 1286490
ABSTRACT OF THE DISCLOSURE A method of controlling the corrosion of a metal surface in contact with an aqueous system while at the same time preventing the precipitation of potentially scale-forming calcium phosphate. The water in such systems is treated with a combination of a source of orthophosphate ion and a mixture of methylene phosphonic acid derivatives of C6 diamines, or the salts thereof. A composition for preventing the precipitation of calcium phos- phate containing a mixture of methylene phosphonic acid deriva- tives of C6 diamines or the salts thereof.
526578
May Oscar W.
Terry John P.
Buckman Laboratories International Inc.
Ridout & Maybee Llp
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