Process for the protection against corrosion of cast iron boiler

Details Process for the protection against corrosion of cast iron boiler Process for the protection against corrosion of cast iron boiler

1977-05-12

1979-04-10

Padgett, Benjamin R.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

252387, 252146, C23F 1102, C23F 1104

Patent

active

041488580

ABSTRACT:
Gray cast iron can be protected against corrosion by the vapors of boiling concentrated sulfuric acid when a compound containing positive nitrogen, e.g., nitrogen oxide, is introduced into the gas space between the cast iron to be protected and the boiling sulfuric acid.

REFERENCES:
patent: 3096169 (1963-07-01), Shapiro et al.
patent: 3375077 (1968-03-01), Block et al.
patent: 3630752 (1971-12-01), Scott
patent: 3876371 (1975-04-01), Costain et al.
patent: 3887488 (1975-06-01), Scott et al.
patent: 3925245 (1975-12-01), Harris et al.
patent: 3932130 (1976-01-01), Bennett et al.

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