TITLE:
Electrochemical Study of the Synergistic Effect of Two Copper Corrosion Inhibitors, Nicotinic Acid (NAC) and Nicotinamide (NAM) in Two Different Media
AUTHORS:
Yapi Serge Brou, Nagnonta Hippolyte Coulibaly, N’Guessan Yao Silvère Diki, Juan Creus, Albert Trokourey
KEYWORDS:
NAC, NAM, Antagonist Effect, Synergistic Effect
JOURNAL NAME:
Open Journal of Physical Chemistry,
Vol.9 No.4,
October
31,
2019
ABSTRACT: Inhibitive properties of NAC and NAM as well as their mixture have been investigated in two different corrosive media through potentiodynamic polarization and electrochemical impedance spectroscopy at 298 K. These electrochemical measurements indicate that the inhibition efficiency increases with the concentration for each of the inhibitors used separately as well as for their mixture. In both cases, the combination behaves as mixed type inhibitor with a great cathodic tendency. NaCl 3.5% highlights an antagonist effect of NAM which reduces the effectiveness of NAC whereas HNO3 1M shows a synergistic effect between them.