Study on the Corrosion inhibition Properties of Some Quinoline Derivatives as Acidizing Corrosion Inhibitors for Steel

In this paper, four quinoline quaternary ammonium salts were synthesized using quaternization reaction, which were benzyl quinolion (BQL), naphthylmethyl quinolinium chloride (NQL), benzyl-8-hydroxy quinolinium chloride (BHQ) and naphthylmethyl 8-hydroxy quinolinium chloride (NHQ). The corrosion inhibition properties of the quinoline derivatives as corrosion inhibitors on P110 steel in 20% HCl solution at 60°C at different concentrations were investigated by weight loss and electrochemical measurements. The results showed that as the concentration of corrosion inhibitor increases, the corrosion rate decreased and the inhibition efficiency improved. Among various corrosion inhibitors at the same concentration, their inhibition efficiencies can be ranked from lowest to highest as follows: QL(quinoline)<8-HQ(8-hydroxyquinoline)更多