The Synthesis of 3-(( 4-hydroxy-3-rnethoxybenzylidene)amino)- 6-(hydroxymethyl)tetrahydro-2H-pyran-2,4,5-triol as Corrosion Inhibitor towards Carbon Steel in HCI 1 M

• Main Author: Alviani Fitria, Rizka
• Format: Final Project
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/38559
• Institution: Institut Teknologi Bandung

Schiff base derivati\e compound 3-((4-hydro:\.-y-3-methoxybenziliden)amino)-6- (hydroxymethyl) tetrahidro-2H-piran-2.4.5-triol can be used as a green corrosion inhibitor on carbon steel in HCI I M environment . Schiff base deri\atives were characterized using Fourier Transform Infrared (FTIR) and Nuclear Magnetic Re onance (NMR) spectroscopy. A -glucosami ne was successfully isolated fi•om shrimp shells through chitin reaction and hydrolysis of chitosan. Based on FTIR spectroscopy obtained \vavenumber 335 J .32 cm• 1 which shows the -OH functional group. 1616. 12 cm•1 which shows the -N H 2 functional group. and no wave number appears at I 093 cm•1 which shows hydrolysis of glycosidic bond on chitosan . Corrosion inhibitor can be synthesized through the reaction between vanillin and N-glucosamine. Based on Ff!R spectroscopy, the wavenumber 1662.90 cm•1 was obtained which showed the formation of an imine bond -('= . The results of characterization of 1 H l\M R (500 MHz. DMSO-,) showed a chemical shift at 8.0368 ppm which sho\\ed that the imine bond (-C= , ) had been fonned. The results of the characterization of 11C 1\IMR (500 1Hz. DMSO-,) show chemical shift 161.6655 ppm which indicates that the carbon atoms in the imjne (-(' = . ). Measurements using the EIS method showed the greatest inhibition efficiency as a corrosion inhibitor occurred at concentTation 125 ppm and temperature of 35 "C that equal to 77.52°o. Measurements using the Tafel method showed the greatest inhibition efficiency as a corrosion inJ1ibitor that occurred at concentration of 1 25 ppm and temperature of35 ''C that equal to 75.72°o. Tafel method showed that these inhibitor act as mixed-type inhibitors.