Process for the protection against corrosion of cast iron in boi

Details Process for the protection against corrosion of cast iron in boi Process for the protection against corrosion of cast iron in boi

1977-06-16

1979-03-20

Guynn, Herbert B.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

203 7, 203 86, 252387, 422 8, C23F 1104

Patent

active

041453930

ABSTRACT:
Gray cast iron can be protected against corrosion in boiling concentrated sulfuric acid if the acid contains precious metals such as gold or the metals of the platinum group. It is possible to add small amounts of compounds of the precious metal to the acid or to bring both the gray cast iron and the acid into contact with metal sheets or wires of the precious metal. It is also possible to use small amounts of the precious metal as an alloying element of the gray cast iron.

REFERENCES:
patent: 2462638 (1949-02-01), Hetherington
patent: 2513131 (1950-06-01), Baer
patent: 3316179 (1967-04-01), Hoonstra et al.
patent: 3773675 (1973-11-01), Heiss et al.
patent: 3887488 (1975-06-01), Scott et al.

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