Diphosphonates as corrosion inhibitors for antifreeze coolants a

Details Diphosphonates as corrosion inhibitors for antifreeze coolants a Diphosphonates as corrosion inhibitors for antifreeze coolants a

1991-10-30

1994-10-04

Skane, Christine

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

422 15, 252 75, 252 785, 25238923, C23F 11167, C09K 500

Patent

active

053524080

ABSTRACT:
A coolant or antifreeze composition has one or more glycols or glycol ethers in combination with water, one or more additives, and an effective amount of 1-hydroxyoctylidene-1,1-diphosphonic acid or 1-hydroxydodecylidene-1,1-diphosphonic acid as a corrosion inhibitor.

REFERENCES:
patent: 3855284 (1974-12-01), Germscheid
patent: 3935125 (1976-01-01), Jacob
patent: 4329243 (1982-05-01), Diebel
patent: 4613450 (1986-09-01), Moran et al.
patent: 4707286 (1989-11-01), Carr
patent: 4904413 (1990-02-01), Hoots et al.
patent: 5000916 (1991-03-01), Vukasovich et al.

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