14 research outputs found
Synergistic effect p-phenylenediamine and n,n diphenylthiourea on the electrochemical corrosion behaviour of mild steel in dilute acid media
Electrochemical studies of the synergistic effect
of p-phenylenediamine and n,n diphenylthiourea (TPD) as
corrosion inhibitor of mild steel in dilute sulphuric and
hydrochloric acid through weight loss and potentiodynamic
polarization at ambient temperature were performed.
Experimental results showed the excellent performance of
TPD with an optimal inhibition efficiency of 88.18 and
93.88 %in sulphuric and 87.42 and 87.15 %in hydrochloric
acid from both tests at all concentration studied. Polarization
studies show the compound to be a mixed-type inhibitor.
Adsorption of deanol on the steel surface was observed to
obey the Langmuir and Frumkin isotherm models. X-ray
diffractometry confirmed the absence of corrosion products
and complexes. Optical microscopy confirmed the selective
inhibition property of TPD to be through chemical adsorption
on the steel surfac
The use of electrochemical techniques for the characterization of the corrosion behavior of sol-gel-coated metals
2nononenoneAndreatta, Francesco*; Fedrizzi, LorenzoAndreatta, Francesco; Fedrizzi, Lorenz