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

S. Muralidharan | Zendy; R. Chandrasekar | Zendy; S. Venkatakrishna Iyer | Zendy

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

Author(s) -

S. Muralidharan,

R. Chandrasekar,

S. Venkatakrishna Iyer

Publication year - 2000

Publication title -

journal of chemical sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.32

H-Index - 52

eISSN - 0973-7103

pISSN - 0253-4134

DOI - 10.1007/bf02704314

Subject(s) - corrosion , cathodic protection , adsorption , permeation , nyquist plot , hydrogen , double layer capacitance , electrochemistry , chemistry , dielectric spectroscopy , inorganic chemistry , nuclear chemistry , materials science , organic chemistry , membrane , electrode , biochemistry

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.

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