title: Corrosion mitigation of N-(2-hydroxy-3-trimethyl ammonium)propyl chitosan chloride as inhibitor on mild steel.
abstract: The biopolymer N-(2-hydroxy-3-trimethyl ammonium)propyl chitosan chloride (HTACC) was synthesised and its influence as a novel corrosion inhibitor on mild steel in 1M HCl was studied using gravimetric and electrochemical experiments. The compound obtained was characterised using FTIR and NMR studies. The inhibition efficiency increased with the increase in concentration and reached a maximum of 98.9% at 500 ppm concentration. Polarisation studies revealed that HTACC acts both as anodic and cathodic inhibitor. Electrochemical impedance studies confirmed that the inhibition is through adsorption on the metal surface. The extent of inhibition exhibits a negative trend with increase in temperature. Langmuir isotherm provides the best description on the adsorption nature of the inhibitor. SEM analysis indicated the presence of protective film formed by the inhibitor on the metal surface.
authors.affiliation: Department of Chemistry, The Gandhigram Rural Institute - Deemed University, Gandhigram 624 302, Tamil Nadu, India.
authors.forename: Y
authors.initials: Y
authors.lastname: Sangeetha
authors.affiliation: Department of Chemistry, The Gandhigram Rural Institute - Deemed University, Gandhigram 624 302, Tamil Nadu, India.
authors.forename: S
authors.initials: S
authors.lastname: Meenakshi
authors.affiliation: Women's Polytechnic College, Lawspet 605 008, Puducherry, India. Electronic address: sairam_adithya@yahoo.com.
authors.forename: C
authors.initials: C
authors.lastname: SairamSundaram
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D003343:Corrosion; D058266:Dielectric Spectroscopy; D055664:Electrochemical Techniques; D009682:Magnetic Resonance Spectroscopy; D000644:Quaternary Ammonium Compounds / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D017550:Spectroscopy, Fourier Transform Infrared; D013232:Steel / Q000494:pharmacology*; D013499:Surface Properties; D013696:Temperature
chemical_list: C550160:N-(2-hydroxypropyl)-3-trimethylammonium chitosan; D000644:Quaternary Ammonium Compounds; D013232:Steel; D048271:Chitosan
keywords: Acid medium.; Corrosion; Mild steel; Quaternised chitosan