title: Interactions at the mild steel acid solution interface in the presence of O-fumaryl-chitosan: Electrochemical and surface studies.
abstract: The performance of synthesised O-fumaryl-chitosan (OFC) as corrosion inhibitor for mild steel in 1M HCl has been evaluated through various studies. The initial screening by weight loss method revealed the good inhibition efficiency by the inhibitor. Thermodynamic and kinetic parameters have been calculated and discussed. The mode of adsorption is physical in nature and it follows Langmuir adsorption isotherm. Electrochemical measurements supported the inhibition of mild steel by the fumaryl derivative of chitosan. Polarisation studies provided the information that the inhibition is of mixed type. The formation of inhibitor film is assured by surface morphological studies with Scanning electron microscopy (SEM) and Atomic force microscopy (AFM). The mechanism of inhibition is derived from the Fourier-transform infrared (FTIR) spectroscopy and zero charge potential measurement. The adsorbed film is characterised using FTIR and X-ray diffraction studies (XRD).
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: Department of Science and Humanities, Women's Polytechnic College, Lawspet, Puducherry 605 008, India. Electronic address: sairam_adithya@yahoo.com.
authors.forename: C Sairam
authors.initials: CS
authors.lastname: Sundaram
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000031:analogs & derivatives* / Q000737:chemistry*; D003343:Corrosion; D004563:Electrochemistry; D006851:Hydrochloric Acid / Q000737:chemistry*; D007700:Kinetics; D008970:Molecular Weight; D012996:Solutions; D013232:Steel / Q000737:chemistry*; D013499:Surface Properties; D013816:Thermodynamics
chemical_list: D012996:Solutions; D013232:Steel; D048271:Chitosan; D006851:Hydrochloric Acid
keywords: AFM; Acid medium; Biopolymer; FTIR; Mild steel