Electrochemical analysis of silane incorporated sodium dodecylbenzene sulphonate: zinc sulphate pre-treatment on mild steel and its effect on epoxy coating performance. (3rd April 2022)

• Record Type: Journal Article
• Authors: Ismail, I.; Harun, M. K.; Yahya, M. Z. A.
• Is Part Of: Corrosion engineering, science, and technology. Volume 57:Number 3(2022)
• Page Start: 204
• Page End: 213
• Publication Date: 2022-04-03
• Subjects: Silane film -- corrosion inhibitors -- corrosion resistance -- adhesion -- cathodic delamination -- anodic delamination; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1080/1478422X.2021.2016089
• Languages: English
• ISSNs: 1478-422X

Abstract

ABSTRACT: Variation of surface chemical energy and its effects on adhesion strength and corrosion protection properties of epoxy coatings of mild steel substrates were studied. Results indicated that pre-treatment with a mixture of 3-glycidoxypropyltrimethoxysilane, sodium dodecylbenzene sulphonates and zinc sulphate inhibitors enhanced the corrosion protection properties of epoxy coating when compared to untreated substrates. The formation of a compact insoluble layer of zinc hydroxide/oxide together with SDBS complex on the mild steel surface was found to affect the adhesion properties and resistance towards cathodic/anodic delamination of epoxy coating. This was primarily caused by the formation of strong interfacial interaction and increased in surface passivation. The findings suggested, adhesion alone plays a little part in preventing underfilm corrosion. The underfilm corrosion activities are determined by surface passivity towards corrosion reactions.