Corrosion inhibitors for alkanolamine gas treating systems

Details Corrosion inhibitors for alkanolamine gas treating systems Corrosion inhibitors for alkanolamine gas treating systems

1982-11-29

1985-03-05

Lone, Werren B.

Compositions

Preservative agents

Anti-corrosion

252394, 252388, C23F 1118, C09K 300

Patent

active

045029792

ABSTRACT:
Corrosion of metallic surfaces by aqueous alkanolamine solutions employed in acid gas removal is inhibited by combinations of particular vanadium compounds and an organic compound selected from the group consisting of nitro-substituted aromatic acids, nitro-substituted acid salts, and 1,4-naphthoquinone, preferably from the group consisting of p-nitrobenzoic acid, m-nitrobenzoic acid, 3,5-dinitrobenzoic acid, p-nitrophenol, m-nitrophenol, m-nitrobenzenesulfonic acid, 1,4-naphthoquinone, and mixtures thereof.

REFERENCES:
patent: 3808140 (1974-04-01), Mago
patent: 3851041 (1974-11-01), Eickmeyer
patent: 3896044 (1975-07-01), Mago
patent: 3951844 (1976-04-01), Mago
patent: 3959170 (1976-05-01), Mago
patent: 4371450 (1983-02-01), Nieh
patent: 4372873 (1983-02-01), Nieh
patent: 4405584 (1983-09-01), Foroulis
Greene; "Mechanism and Application of Oxidizing Inhibitors", Materials Performance, Mar. 1982, pp. 20-22.
Lizalovs: "Molybdates and Corrosion Inhibitors in the Presence of Chlorides", Corrosion, 32, pp. 263-266, (1976).
Fischer, "Studies on the Passivating Effect of Organic Oxidizing Agents or on Iron in Neutral and Slightly Acid Solutions. Part 2, Aromatic Nitro Compounds", Werkstoffe and Korrosion, vol. 28, pp. 470-475, (1977).

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