A study by electrochemical impedance spectroscopy and surface analysis of corrosion product layers formed during CO2 corrosion of low alloy steel

Rehan De Motte,Edoardo Basilico,Mingant Rémy,Jean Kittel,Francois Ropital, Pierre Combrade,Sophia Necib, Valérie Deydier,Didier Crusset, Sabrina Marcelin

Corrosion Science（2020）

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摘要

•Evolution of the corrosion product layer was studied with EIS.•Initially the surface behaves as a plain corroding electrode gradually blocked by scales.•OCP rise characteristic of “pseudo-passivation” is concomitant with diffusion limitation.•High frequency time constant associated with the corrosion product film.

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pCO2,Rct,CPE,α,Qdl,Qfilm,Di,Zd,Ki,Rd,δf,Cdl,EEC,EIS,Sa,Re,EDX,Cfilm,A,d,GIXRD,HF,i,LPR,LF,MF,OCP,l,Rpore,ξ,ε,VRMS,SEM,STEM,Rsolution,t,ε0,Wd

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