Corrosion of API-X100 steel heat affected zones (HAZs) in CO2-saturated solutions - EIS investigations

Faysal Fayez Eliyan, Akram Alfantazi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

This paper evaluates and models the corrosion products growth on the HAZs of API-X100 steel in CO2 solutions. It first outlines the aqueous dissociation of CO2 to generate H2CO3, H+, the adsorption and dissolution processes on the ferrite grains, the cathodic reactions, the cathodic role(s) of Fe3C, and the precipitation and growth of the corrosion products. With the use of EIS, over after 5,000, 10,000 and 15,000 s, the charge transfer resistance, double-layer capacitance, and the resistance of the porosity of the growing corrosion products, were measured to be fitted with equivalent circuits and to model the corrosion interactions with proper interfaces. The HAZs cooled down from 950°C at 10°C/s showed a continuous decay in the corrosion resistance which was lower than that of the base steel. The 30 and 60°C/s showed intrinsically high charge-transfer resistance and evidence for thin corrosion products.

Original languageBritish English
Title of host publicationEUROCORR 2013 - European Corrosion Congress
StatePublished - 2013
EventEuropean Corrosion Congress, EUROCORR 2013 - Estoril, Portugal
Duration: 1 Sep 20135 Sep 2013

Publication series

NameEUROCORR 2013 - European Corrosion Congress

Conference

ConferenceEuropean Corrosion Congress, EUROCORR 2013
Country/TerritoryPortugal
CityEstoril
Period1/09/135/09/13

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