Method for mitigation of caustic corrosion in coordinated phosph

Details Method for mitigation of caustic corrosion in coordinated phosph Method for mitigation of caustic corrosion in coordinated phosph

1991-01-18

1992-08-25

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

210696, 210698, 252390, 252392, 252394, 252401, 252403, 252405, 422 12, 422 14, C23F 1106

Patent

active

051417162

ABSTRACT:
The present invention utilizes low volatility amines or alkanol amines to control caustic corrosion which can take place when a boiler system, treated with a coordinated phosphate/pH program, is "out of control".
N-substituted hydroxyalkyl piperazines are also capable of mitigating caustic corrosion in coordinated phosphate/pH programs. Combinations of the compounds of the present invention and phosphate have also been shown to be efficacious at mitigating caustic corrosion in coordinated phosphate/pH programs.

REFERENCES:
patent: 4253886 (1981-03-01), Aonuma et al.
patent: 4372873 (1983-02-01), Nieh
patent: 4557838 (1985-12-01), Nichols et al.
patent: 4877578 (1989-10-01), Zetlmeisl et al.
CA79(4):22372f, Antropov et al., 1973.
Power Engineering, Feb. 1978, George Gibson, pp. 66-69, "The Basics of Phosphate-pH Boiler Water Treatment".

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