Adsorption and inhibition performance of the novel cationic Gemini surfactant as a safe corrosion inhibitor for carbon steel in hydrochloric acid

ABSTRACT

The new synthesized cationic Gemini surfactant (CGS) was tested as a corrosion inhibitor for carbon steel (CS) in 1.0 M hydrochloric acid using weight loss, electrochemical spectroscopy and potentiodynamic polarization. The inhibition efficiency is increased by increasing the CGS concentration and is almost constant within the temperature range studied. The inhibition was explained by adsorption of the CGS molecule on the CS surface. A mixed-type inhibitor is suggested for the inhibitory effects of CGS as revealed by the potentiodynamic polarization technique. The changes in impedance parameters suggested that the adsorption of the inhibitor on the CGS surface led to the formation of protective films. The adsorption of the CGS on the surface of CS obeys Langmuir adsorption isotherm. Thermodynamic and kinetic parameters were calculated and discussed.

GRAPHICAL ABSTRACT

KEYWORDS:

• Steel
• EIS
• weight loss
• polarization
• acid inhibition
• interfaces

Disclosure statement

No potential conflict of interest was reported by the authors.

Notes on contributors

M. Abdallah is professor of physical chemistry. He published more than 130 manuscripts in the international journals. Most publications in the field of corrosion inhibition of some metals and alloys in aqueous solutions using different chemical and electrochemical techniques. He supervisor of 42 Master degree and 22 Ph.D. degree.

M. A. Hegazy is a professor of applied chemistry, Egyptian Petroleum Research Institute, Egypt. He published several papers in corrosion inhibition of metals and alloys using different types of surfactants in international journals. He supervisor of several M.Sc and Ph.D degree.

M. Alfakeer is an assistant professor of physical chemistry, Chemistry Department, Faculty of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia. She has published some manuscripts in the field of corrosion inhibitors.

H. Ahmed is a Ph.D students, Chemistry Department, Faculty of Science, Benha University, Benha, Egypt. He is published some papers in corrosion inhibition of steel in acidic solutions using surfactant compounds.

ORCID

M. Abdallah http://orcid.org/0000-0002-6132-8849