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Low toxic polymeric surfactant as a corrosion inhibitor for mild steel in hydrochloric acid medium.
- Source :
-
Anti-Corrosion Methods & Materials . 2016, Vol. 63 Issue 6, p421-430. 10p. - Publication Year :
- 2016
-
Abstract
- Purpose Surfactants have been reported to have high inhibition efficiencies for corrosion of steel. This paper aims to study the performance of a low toxic copolymer of polydimethylsiloxane and polyoxyalkylene (POA) surfactant named as POPS, as a corrosion inhibitor for mild steel (ASTM 1005) in hydrochloric acid (HCl) solution at 25°C.Design/methodology/approach To evaluate POPS efficiency as a corrosion inhibitor, the following techniques were used: surface tension measurements, weight loss measurements, open circuit potential monitoring, potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS), scanning electron microscopy and contact angle measurements.Findings Results indicated that POPS acted as a mixed corrosion inhibitor and led to a hydrophobic protector film on the metal surface. The adsorption process obeyed the Langmuir adsorption isotherm by chemisorption. The maximum efficiency of the surfactant studied was achieved in a concentration around the critical micelle concentration.Originality/value Surfactant (POPS) of low level of toxicity acts as a mixed corrosion inhibitor in HCl medium. Inhibitor film formation was characterized by EIS results. A mechanism for corrosion inhibition is proposed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00035599
- Volume :
- 63
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Anti-Corrosion Methods & Materials
- Publication Type :
- Academic Journal
- Accession number :
- 124840809
- Full Text :
- https://doi.org/10.1108/ACMM-11-2014-1458