Abstract

The electrochemical corrosion behavior of super 13 Cr stainless steel in 1 mol/L HCl aqueous solution with quinoline quaternary ammonium salt was studied. The influence of temperature, anions type and concentration of halides on the inhibition efficiency were also investigated.The results showed that the inhibitor was a mixed type inhibitor which mainly suppressed the anodic reaction. The desorption of inhibitor could be facilitated with the increasing of temperature; correspondingly its inhibition efficiency was lowered. The synergistic effect of inhibitors with different halides showed a ranking as follows: I-Br-Cl-. The synergistic effect of inhibitor with I-could be enhanced with the increase of the I-concentration. The inhibition efficiency of quinoline quaternary ammonium salt exceeded 99%, when the concentration of KI was higher than 0.005 mol/L.

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