Abstract
AbstractThe corrosion inhibition efficiency of sodium caprylate (SC) in protecting carbon steel (CS) in aqueous 3.5 wt.% NaCl was studied. SC was found to enable good corrosion protection of CS, yielding a maximum corrosion inhibition efficiency of 80 ± 2%. The inhibition efficiency was shown to be directly proportional to the SC surface coverage, characterized by a two‐step adsorption isotherm. The adsorption of SC on CS in the lower SC concentration region was found to follow the Langmuir adsorption isotherm and the first‐order reversible adsorption kinetics. The corresponding Gibbs free energy of SC adsorption was determined to be −23.8 kJ · mol−1, indicating a highly spontaneous adsorption process. The scanning electron microscopy imaging of the SC‐inhibited CS showed that the surface exhibited good corrosion stability during a 72 h exposure to the test medium.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
