Demonstration of epoxy/carbon steel interfacial delamination behavior: Electrochemical impedance and X-ray spectroscopic analyses. (January 2016)

• Record Type: Journal Article
• Authors: Ghaffari, Mehdi; Saeb, Mohammad Reza; Ramezanzadeh, B.; Taheri, Peyman
• Is Part Of: Corrosion science. Volume 102(2016)
• Page Start: 326
• Page End: 337
• Publication Date: 2016-01
• Subjects: A. Organic coatings -- B. XPS -- B. EIS -- C. Interfaces; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2015.10.024
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Carbon steel surface was modified chemically using acid and alkaline solution. Oxide surface morphology and chemistry were studied. XPS has been used to evaluate the residue bondings on the metal surface. The interfacial bonding stability of the differently treated samples has been investigated. An improved protection against corrosion was observed for the acid treated samples. Abstract: In this work, we introduce an efficient methodology to assess the delamination mechanism of epoxy coating from steel substrate combining spectroscopic and analytical techniques. To reflect the competence of this approach, different samples were prepared by applying epoxy/polyaminoamide layers on untreated, acid and alkaline pretreated substrates. The results obtained from XPS and energy dispersive X-ray analyses describe delamination of the coatings on differently pretreated surfaces during the pull-off test. EIS measurements demonstrated that acid treatment improves the resistance against cathodic delamination, while XPS analysis provided useful data about coating delamination from the substrate.