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Title: Corrosion inhibitor for aqueous ammonia absorption system

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.

Inventors:
 [1];  [2]
  1. (Benton Harbor, MI)
  2. (St. Joseph, MI)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
871853
Patent Number(s):
5811026
Application Number:
08/696,789
Assignee:
Phillips Engineering Company (St. Joseph, MI) ORNL
DOE Contract Number:  
15X-17497C
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
corrosion; inhibitor; aqueous; ammonia; absorption; method; inhibiting; formation; hydrogen; improving; water; refrigeration; air; conditioning; heat; pump; maintaining; hydroxyl; concentration; fluid; selected; range; anaerobic; conditions; temperatures; 425; degree; maintained; introducing; amount; effective; produce; corresponding; normality; relative; content; ranging; 015; 25; fluids; carbon; steel; resulting; solutions; strong; base; specified; buffer; selected range; air conditioning; absorption refrigeration; heat pump; aqueous solution; aqueous solutions; carbon steel; amount effective; anaerobic conditions; strong base; water content; inhibiting corrosion; resulting hydrogen; aerobic conditions; /252/62/210/422/

Citation Formats

Phillips, Benjamin A., and Whitlow, Eugene P. Corrosion inhibitor for aqueous ammonia absorption system. United States: N. p., 1998. Web.
Phillips, Benjamin A., & Whitlow, Eugene P. Corrosion inhibitor for aqueous ammonia absorption system. United States.
Phillips, Benjamin A., and Whitlow, Eugene P. Tue . "Corrosion inhibitor for aqueous ammonia absorption system". United States. https://www.osti.gov/servlets/purl/871853.
@article{osti_871853,
title = {Corrosion inhibitor for aqueous ammonia absorption system},
author = {Phillips, Benjamin A. and Whitlow, Eugene P.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {9}
}

Patent:

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