Corrosion inhibitor for aqueous ammonia absorption system

Details Corrosion inhibitor for aqueous ammonia absorption system Corrosion inhibitor for aqueous ammonia absorption system

1996-08-14

1998-09-22

Gibson, Sharon

Compositions

Heat-exchange, low-freezing or pour point, or high boiling...

Organic components

252 68, 252 74, 252 76, 2523894, 25238954, 25238962, 252394, 210696, 422 13, 62112, C09K 504, F25B 1504

Patent

active

058110267

ABSTRACT:
A method of inhibiting corrosion and the formation of hydrogen and thus improving absorption in an ammonia/water absorption refrigeration, air conditioning or heat pump system by maintaining the hydroxyl ion concentration of the aqueous ammonia working fluid within a selected range under anaerobic conditions at temperatures up to 425.degree. F. This hydroxyl ion concentration is maintained by introducing to the aqueous ammonia working fluid an inhibitor in an amount effective to produce a hydroxyl ion concentration corresponding to a normality of the inhibitor relative to the water content ranging from about 0.015 N to about 0.2 N at 25.degree. C. Also, working fluids for inhibiting the corrosion of carbon steel and resulting hydrogen formation and improving absorption in an ammonia/water absorption system under anaerobic conditions at up to 425.degree. F. The working fluids may be aqueous solutions of ammonia and a strong base or aqueous solutions of ammonia, a strong base, and a specified buffer.

REFERENCES:
patent: 2755170 (1956-07-01), Stubblefield et al.
patent: 2972581 (1961-02-01), Johnson et al.
patent: 3503438 (1970-03-01), Geyer
patent: 3555841 (1971-01-01), Modahl et al.
patent: 3580759 (1971-05-01), Albertson et al.
patent: 3609086 (1971-09-01), Modahl et al.
patent: 3609087 (1971-09-01), Chi et al.
patent: 4019992 (1977-04-01), Krueger
patent: 4043387 (1977-08-01), Lamp
patent: 4159737 (1979-07-01), Biermann et al.
patent: 4237090 (1980-12-01), DeMonbrun et al.
patent: 4333894 (1982-06-01), Hoppe et al.
patent: 4364900 (1982-12-01), Burrill
patent: 4382008 (1983-05-01), Boreland et al.
patent: 4561259 (1985-12-01), van der Sluys
patent: 4564465 (1986-01-01), Bibber
patent: 4567736 (1986-02-01), van der Sluys et al.
patent: 4586561 (1986-05-01), Franco et al.
patent: 4588513 (1986-05-01), Triebel et al.
patent: 4619119 (1986-10-01), Dijkstra et al.
patent: 4663053 (1987-05-01), Geiger
patent: 4728452 (1988-03-01), Hansen
patent: 4884628 (1989-12-01), En-Jian et al.
patent: 4895003 (1990-01-01), Houghton et al.
patent: 4915872 (1990-04-01), Ciuba et al.
patent: 4926659 (1990-05-01), Christensen et al.
patent: 4946595 (1990-08-01), Miller, Jr.
patent: 4963290 (1990-10-01), Bressan et al.
patent: 5002697 (1991-03-01), Crucil et al.
patent: 5067330 (1991-11-01), Cook et al.
patent: 5082592 (1992-01-01), McDonald
patent: 5097676 (1992-03-01), Erickson
patent: 5108499 (1992-04-01), Dalton
patent: 5192447 (1993-03-01), Fivizzani
patent: 5230810 (1993-07-01), Clark et al.
patent: 5320779 (1994-06-01), Fivizzani
patent: 5342578 (1994-08-01), Agrawal et al.
patent: 5547600 (1996-08-01), Downey
B. E. Wilde, "The Influence of Hydrogen, Oxygen, and Ammonia on the Corrosion Behavior of Plain Carbon Steel in High Temperature Water,"vol. 24, No. 10, Corrosion--NACE, Oct., 1968, pp. 338-343.
E. C. McKelvy and Aaron Isaacs, "Causes and Prevention of the Formation of Noncondensible Gases in Ammonia Absorption Refrigeration Machines," Technologic Papers of the Bureau of Standard, (1920) No. 180, Oct. 25, 1920, pp. 1-10.
K. F. Dockus, R.H. Krueger and W. F. Rush, "Corrosion Inhibition in Lithium Bromide Absorption Refrigeration Systems," Ashrae Transactions, vol. 69, (1968), p. 190.
Morris Cohen, "The Breakdown and Repair of Inhibitive Films in Neutral Solution, " The Journal of Science and Engineering, vol. 32, No. 12, Dec., 1976, pp. 461-465.
M. Cohen, "An Electron Diffraction Study of Films Formed By Sodium Nitrite Solution on Iron," The Journal of Physical Chemistry, vol. 56, 1952, pp. 451-453.
J.E.O. Mayne and M.J. Pryor, "The Mechanism of Inhibition of Corrision of Iron by Chromic Acid and Potassium Chromate,"The Journal of Chemistry Society, 1949, pp. 1831-1835.

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