Enhanced Corrosion Resistance of Carbon Steel in Hydrochloric Acid Solution by Polyoxometalate-Estertin Derivatives
Xing-Fang Wang, Xinyu Liu, Fang Su, Jiansheng Li, Zai‐Ming Zhu, Xiao‐Jing Sang, Lan‐Cui Zhang
Abstract
after immersion in a 0.5 M HCl solution for 10 h. Scanning electron microscopy-energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy analyses show that these POM-based inhibitors form films on the carbon steel and the adsorption mechanism obeys the Langmuir adsorption model. The thermodynamic activation parameters were calculated, proving the occurrence of both chemical and physical adsorptions. The film-forming mechanism was also analyzed. This work provides guidance for synthesizing new lacunary POM-based materials to protect metals from corrosion in HCl pickling.
Topics & Concepts
PolyoxometalateCorrosionX-ray photoelectron spectroscopyHydrochloric acidAdsorptionElectrochemistryMetalPicklingCarbon steelLangmuir adsorption modelChemistryTransition metalCarbon fibersMaterials scienceInorganic chemistryNuclear chemistryChemical engineeringMetallurgyPhysical chemistryCatalysisComposite numberElectrodeOrganic chemistryComposite materialEngineeringPolyoxometalates: Synthesis and ApplicationsCorrosion Behavior and InhibitionVanadium and Halogenation Chemistry