Method of preventing corrosion of steelworks

Details Method of preventing corrosion of steelworks Method of preventing corrosion of steelworks

1975-04-02

1976-11-02

Richman, Barry S.

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 7, 208 47, C23F 1108, C23F 1118

Patent

active

039894592

ABSTRACT:
A method of preventing corrosion of steelworks by a flowing corrosive solution having a pH of 6.7 to 7.1 and comprising water, ammonia in a concentration of from 0.5 to 4 mols per liter of solution and hydrogen sulfide in a concentration of from 5 to 15 kg/cm.sup.2 as its partial pressure in the vapor phase, said corrosive solution contacting said steelwork at a flow velocity of from 1 to 10 meters per second by adding at least one substance selected from the group consisting of elemental sulfur, ammonium polysulfide and alkali polysulfide to said corrosive solution in an amount of 74-200 ppm as the amount of available sulfur.

REFERENCES:
patent: 2780583 (1957-02-01), Skei et al.
patent: 2947686 (1960-08-01), Phillips
patent: 2973316 (1961-02-01), Howland
patent: 3272736 (1966-09-01), Petro et al.

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