Abstract

Corrosion inhibitors for acid cleaning process are used to restrict dissolution of the base metal and decrease acid consumption
and hydrogen gas evolution. Because of the toxic nature and high cost of some chemicals currently in use, it is necessary to
develop environmentally acceptable and less expensive inhibitors. Natural products can be considered as a good source for
this purpose. The present study of the effective performance of acid extract of Ixora coccinea on the corrosion inhibition of
mild steel in 1 M HCl at ambient temperature has been carried out as an eco-friendly initiative to mitigate corrosion of mild
steel in acid medium. Conventional mass loss and electrochemical measurement techniques were used for the experimental
purpose. Experiments were carried out by varying the concentration of the extract in different period of immersion and at
different temperatures. Suitable adsorption isotherm was obtained. Thermodynamic and kinetic parameters were evaluated.
Electrochemical measurements inferred mixed mode of inhibition. Surface analytical techniques such as FT-IR, UV–Visible,
SEM, and 3D Optical Profilometer proved the corrosion inhibitive property of the investigated inhibitor.