Novel quaternary salts of quinoline oligomer as metal surface protective materials against acid corrosion

• Published in: Chemistry of materials Vol. 4; no. 2; pp. 245 - 247
• Main Authors: Chiang, Long Y, Swirczewski, J. W, Ramanarayanan, T. A, Mumford, J. D
• Format: Journal Article
• Language: English
• Published: American Chemical Society 01.03.1992
• ISSN: 0897-4756; 1520-5002
• DOI: 10.1021/cm00020a002

The high anticorrosion efficiency of the quaternary salt of oligoquinolines on carbon steel surfaces in aqueous acidic media at both ambient and elevated temperatures was observed. They can be utilized as valuable corrosion inhibitors in the acid-flooding process of oil well exploration. While the exact mechanism of inhibition is unclear, it was hypothesized that positively charged quinoline oligomers being absorbed on the metal surface create an electrostatic field which repels the passage of ferrous ions into solution. If this mechanism is correct, the inhibition action can be extended to other metals.