Polyamidoaminoepichlorohydrin resin a novel synthetic anti-corrosive water soluble polymer for mild steel

•DNAC and DUAC resins were studied as corrosion inhibitors for mild steel.•Adsorption of inhibitors obey Langmuir adsorption isotherm.•Surface morphology studies confirmed the formation of protective layer on the steel surface.•Polarization measurements indicate that DNAC and DUAC act as mixed-type...

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Bibliographic Details
Published in:Progress in organic coatings 2017-08, Vol.109, p.117-125
Main Authors: Devi, G. Nirmala, Saranya, J., Manjubaashini, N., Thangadurai, T. Daniel, Roopan, Selvaraj Mohana, Chitra, S.
Format: Article
Language:English
Subjects:
Adsorption
AFM
Computing time
Corrosion
Corrosion inhibitors
Corrosion prevention
Corrosion resistance
EIS
Low carbon steels
Mathematical analysis
Morphology
Polymers
SEM
Steel
Surface chemistry
Temperature dependence
Water soluble
Water soluble polymers
XRD
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Summary:•DNAC and DUAC resins were studied as corrosion inhibitors for mild steel.•Adsorption of inhibitors obey Langmuir adsorption isotherm.•Surface morphology studies confirmed the formation of protective layer on the steel surface.•Polarization measurements indicate that DNAC and DUAC act as mixed-type inhibitors.•Thermal stability of resins were confirmed by TGA and DSC analysis. A novel polyamidoaminoepichlorohydrin resin was prepared and analyzed using spectroscopy techniques and its anti-corrosion properties were studied and observed. Inhibition efficiency was calculated by impedance spectroscopy, loss in weight and potentiodynamic polarization. Authors inferred results as the inhibitors tested differently are acted as better anti-corrosive agent. The thermodynamic data of activation were determined. The adsorption of resin on the steel surface was calculated according to Langmuir adsorption theory. A surface study was performed using SEM, AFM, FT-IR and XRD. Inhibition mechanism was deduced from concentration and temperature dependence of inhibition efficiency, Langmuir adsorption, SEM and AFM results.
ISSN:0300-9440
1873-331X
DOI:10.1016/j.porgcoat.2017.04.034