Akademik Veri Yönetim Sistemi
II. International BRITISH Congress on Interdisciplinary Scientific Research & Practices, London, İngiltere, 24 - 26 Ocak 2025, ss.184
Pyridinium salts have many uses such as anti-microbial, drugs and drug delivery systems, sensors, gene
therapy, cosmetics, phase transfer catalyst, dyes, electrolytes and surfactants 1. As surfactants, it has
been determined that they have anti-corrosion effect against metal corrosion in acidic media and inhibit
electrochemical corrosion reactions on the metal surface. In this study, a di-cationic surfactant
containing two pyridinium rings and a long carbon chain attached to one of these rings was synthesized.
The structure of the surfactant was elucidated by spectroscopic methods (FT-IR and NMR). After
proving its structure, whether this compound inhibits metal corrosion in 1.0 M HCl medium was
investigated by considering the weight loss method on metal coupons. For this purpose, low carbon steel
coupons of a certain size (0.1 cm thickness, 2.2 cm width, 5.0 cm length) and a known elemental
percentage were immersed in 1.0 M HCl solution without inhibitor and containing different
concentrations (2, 10, 50, 250 ppm) of inhibitor. The steel coupons were immersed in the acid solution
for 6, 24, 48 and 72 h. At the end of each period, the inhibition efficiency for each concentration of
inhibitor was calculated by determining the weight loss of the metal. In addition, it was also investigated
how the inhibition activity of the compound changes at different temperatures (25, 40, 60 oC). As a
result of the corrosion tests, the synthesized di-cationic surfactant showed a good anti-corrosion effect
for steel immersed in acidic medium. For each immersion time, although similar results were obtained
at different inhibitor concentrations, it was observed that the inhibition efficiencies increased slightly as
the immersion time increased. However, it was found that inhibition activities increased when the
ambient temperature increased from 25 to 40 oC, but decreased when the ambient temperature increased
to 60 oC.