Electrochemical Study of the Synergistic Effect of Two Copper Corrosion Inhibitors, Nicotinic Acid (NAC) and Nicotinamide (NAM) in Two Different Media

• 作者: Albert Trokourey Juan Creus N’Guessan Yao Silvère Diki Nagnonta Hippolyte Coulibaly Yapi Serge Brou
• 来源期刊: 物理化学期刊(英文)
• 学科: 工学
• 关键词: NAC NAM ANTAGONIST EFFECT Synergistic EFFECT
• 年，卷（期）: wlhxqkyw_2019,（4）
• 页码范围: 193-203
• 页数: 11页
• 分类号: TG1

摘要

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.