SYNTHESIS OF TWO MONO CATIONIC SURFACTANTS CONTAINING AMIDE AND ESTER FUNCTIONAL GROUPS LINKED TO PYRIDINIUM NITROGEN AND COMPARISON OF THEIR ANTI CORROSION PROPERTIES

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Akgül G., Öztürk S.

8th. INTERNATIONAL NEW YORK CONFERENCE ON EVOLVING TRENDS IN INTERDISCIPLINARY RESEARCH & PRACTICES, New York, United States Of America, 1 - 03 May 2023, pp.220

  • Publication Type: Conference Paper / Summary Text
  • City: New York
  • Country: United States Of America
  • Page Numbers: pp.220
  • Bursa Uludag University Affiliated: Yes

Abstract

Corrosion is one of the most important problems that adversely affects the metal industry in economic terms. One of the most commonly used methods in the fight against metal corrosion, which occurs more rapidly and intensively in acidic environment, is to use corrosion inhibitors.[1] Surfactants have been discovered to be one of the most effective inhibitors against corrosion of iron and steel in acidic media in recent years in order to control and reduce the corrosion rate. In accordance with the aim of this discovery, in this study, two cationic surfactants with different functional groups (one amide and the other ester group) attached to pyridinium nitrogen were synthesized and their structures were confirmed by spectroscopic methods (FT-IR and H-NMR). The inhibitory activities of these synthesized products against corrosion of mild steel in 1.0 M HCl medium were determined and compared among themselves. The weight loss method on metal plates was used to determine the inhibitory activity. For this, metal plates were immersed for 24 hours in 1M HCl solutions without inhibitors and with different concentrations of inhibitors. At room temperature of   25 oC, the corrosion inhibition of both synthesized compounds was found to be close to each other. However, at the lower inhibitor concentrations studied, the inhibitor containing the ester functional group showed slightly better inhibition activity. Adsorption isotherm studies were performed to obtain accurate information about the corrosion inhibition mechanism. Isotherm studies based on gravimetric measurements revealed that the adsorption of the synthesized compounds was consistent with the Langmuir isotherm. In addition, in order to support the corrosion inhibition efficiency results, at the end of the corrosion tests, the morphological changes of the surface were observed by taking images of the metal surface with an optical microscope camera.