Improved anti-corrosion behaviour of an inorganic passive film on hot-dip galvanised steel by modified graphene oxide incorporation. (September 2020)

• Record Type: Journal Article
• Authors: Liu, Qi; Zhang, Xiaoran; Zhou, Wenhao; Ma, Ruina; Du, An; Fan, Yongzhe; Zhao, Xue; Cao, Xiaoming
• Is Part Of: Corrosion science. Volume 174(2020)
• Publication Date: 2020-09
• Subjects: Steel -- Zinc -- Passive films; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2020.108846
• Languages: English
• ISSNs: 0010-938X

Abstract

Graphical abstract: Highlights: The charge transfer process is inhibited. The mass diffusion resistance is increased by the modified GO. The localised electrochemical activity of the passive film is reduced. The impermeability of GO benefits the enhanced electrochemical behaviour. Modified morphology contributes to the improved electrochemical property. Abstract: The anti-corrosion behaviour of an inorganic passive film on galvanised steel was improved by modified graphene oxide (mGO). The corrosion current density and corrosion rate were both decreased by one order of magnitude. Resistances to corrosive ion penetration and charge transfer were increased. Moreover, surface defects were modified, benefiting the decreased electrochemical activity of passive films. In addition, Mott–Schottky analyses showed reduced ionic and electronic conductivities of the passive films. This improved anti-corrosion behaviour was closely related to the effect of mGO on surface morphology modifications and charge-transfer inhibition during corrosion.