Effect of piperidones on hydrogen permeation and corrosion inhibition of mild steel in acidic solutions

Journal of Chemical Sciences

R Chandrasekar¹  S Muralidharan¹  S V K Iyer1¹ 

[1] Central Electrochemical Research Institute, Karaikudi 630 006, India$$

关键词: Corrosion inhibition;    piperidones;    hydrogen permeation;    metal embrittlement;    impedance measurements.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

The influence of 3-methyl-2,6-diphenyl piperidin-4-one (MDPO) and 2-phenyl decahydroquinoline-4-one (PDQO) synthesised in the laboratory on hydrogen permeation and corrosion inhibition of mild steel in 1N H2SO4 has been studied using weight loss and various electrochemical AC and DC corrosion-monitoring techniques. Both the compounds inhibit the corrosion of mild steel in H2SO4 Potentiodynamic polarisation studies clearly reveal that they behave predominantly as cathodic inhibitors. The extent of decrease in hydrogen permeation current through steel surfaces has been studied by the hydrogen electropermeation technique. Double layer capacitance (𝐶𝑑𝑙) and charge transfer resistance (𝑅𝑡) values are derived from Nyquist plots obtained from AC impedance studies. The adsorption of these compounds on mild steel surfaces from H2SO4 obeys Temkin’s adsorption isotherm.

【 授权许可】

Unknown