Synthesis and corrosion inhibition effects of quinazolin-(3H)-4-one derivatives containing long-chain pyridinium salts on carbon steel in 1.5 M HCl

摘要: Quinazolin-4(3H)-one derivatives containing long-chain pyridinium salts were synthesized by a quaternization reaction of pyridine. The confirmation the compounds structure was performed FT-IR, 1H NMR and 13C spectroscopy. Corrosion inhibition tests at room temperature for 24 h on carbon steel coupons in 1.5 M HCl using weight loss measurements. After corrosion it has shown that almost all prepared showed efficient higher inhibitor concentrations (100–250 ppm). Nevertheless, quinazolin-(3H)-4-one derivative with longest alkyl chain fairly good acidic media. To support establish test results several surface imaging characterization studies (contact angle, optical profilometer SEM) also performed.