Products tagged with 'iron carbonate'

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The Effect of CO2 Partial Pressure on the Formation and Protective Characteristics of Iron Carbonate Corrosion Products

Product Number: 51324-20666-SG

Author: Amber Sykes; Robert Jacklin; Danny Burkle; Richard C. Woollam; Joshua Owen

Publication Date: 2024

$40.00

This study investigates the effect of carbon dioxide (CO2) partial pressure on the rate of formation and the protective characteristics of iron carbonate (FeCO3) corrosion product layers on X65 carbon steel in aqueous systems. Autoclave corrosion tests were performed at 80 °C in CO2-saturated 3 wt.% sodium chloride solution at partial pressures from 5.5 to 15.5 bar. Linear polarization resistance and electrochemical impedance spectroscopy electrochemical methods were utilized to provide insight into the stages of corrosion product layer development. Analysis of the electrochemical response under each condition revealed key, distinguishable stages associated with the development of an FeCO3 layer as its role transitions from predominantly blocking steel active sites, to ultimately providing additional corrosion suppression through formation of a diffusion barrier. It was found that at higher CO2 partial pressures, the onset of diffusion control was accelerated, but the overall corrosion rate was greater than at lower pressures.

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The Influence Of Oxygen On Protective Iron Carbonate Scales Formed On Carbon Steel In CO2 Environments At Near-Neutral Ph

Product Number: 51322-17899-SG

Author: Pedro Netto da Silva, Gaute Svenningsen, Arne Dugstad, José Antônio da Cunha Ponciano Gomes

Publication Date: 2022

$20.00

High strength carbon steel tensile wires confined in the annulus of flexible pipes might experience corrosion when the annulus is flooded with water, either due to outer sheath breaches or to condensation of water molecules permeating from the bore through the inner sheath. Carbon dioxide (CO₂) molecules may also permeate from the bore and reach the annulus, where it dissolves into water to form carbonic acid (H₂CO₃).

Products tagged with 'iron carbonate'

The Effect of CO2 Partial Pressure on the Formation and Protective Characteristics of Iron Carbonate Corrosion Products

The Influence Of Oxygen On Protective Iron Carbonate Scales Formed On Carbon Steel In CO2 Environments At Near-Neutral Ph

Association for Materials Protection and Performance