Menu
Search
Filters
Close
Menu

Celebrate World Corrosion Awareness Day with 20% off eCourses and eBooks with code WCAD2024 at checkout!

51318-10997-Effect of Alloying Elements on the Corrosion Behavior of Carbon Steel in CO2 Environments

Picture for Effect of Alloying Elements on the Corrosion Behavior of Carbon Steel in CO2 Environments
Available for download

The objective of the present study was to evaluate the effect of alloying elements (Cr, Mo and Cu) on the corrosion behavior of low carbon steel in CO2 environments. Six samples were prepared with varying Cr content from 0 to 2 wt.% and with added 0.5 wt.% of Mo and Cu.

Product Number: 51318-10997-SG
Author: Yoon-Seok Choi / Srdjan Nesic / Hwan-Gyo Jung
Publication Date: 2018
Industry: Science of Corrosion
$0.00
$20.00
$20.00

The objective of the present study was to evaluate the effect of alloying elements (Cr, Mo and Cu) on the corrosion behavior of low carbon steel in CO2 environments. Six samples were prepared with varying Cr content from 0 to 2 wt.% and with added 0.5 wt.% of Mo and Cu; the specimens had ferritic/pearlitic microstructures. Steel samples were exposed to a CO2-saturated 1 wt.% NaCl solution with different combinations of pH and temperature (pH 4.0 at 25oC, pH 6.6 at 80oC, and pH 5.9 at 70oC). Changes in corrosion rate with time were determined by linear polarization resistance (LPR) measurements. The surface morphology and the composition of the corrosion product layers were analyzed by surface analysis techniques (SEM and EDS). Results showed that the addition of Cr and Cu showed a slight positive effect on the corrosion resistance at pH 4.0 and 25oC. At pH 6.6 and 80oC, regardless of the alloying elements, the trend of corrosion rate with time was similar, i.e., the corrosion rate of all specimens decreased with time due to the formation of protective FeCO3. A beneficial effect of Cr addition was clearly seen at pH 5.9 and 70oC, where steel sample without Cr showed no decrease in corrosion rate with time. The addition of Cr promotes the formation of protective FeCO3 and it decreases the corrosion rate.

Key words: CO2 corrosion, carbon steel, alloying element, FeCO3

The objective of the present study was to evaluate the effect of alloying elements (Cr, Mo and Cu) on the corrosion behavior of low carbon steel in CO2 environments. Six samples were prepared with varying Cr content from 0 to 2 wt.% and with added 0.5 wt.% of Mo and Cu; the specimens had ferritic/pearlitic microstructures. Steel samples were exposed to a CO2-saturated 1 wt.% NaCl solution with different combinations of pH and temperature (pH 4.0 at 25oC, pH 6.6 at 80oC, and pH 5.9 at 70oC). Changes in corrosion rate with time were determined by linear polarization resistance (LPR) measurements. The surface morphology and the composition of the corrosion product layers were analyzed by surface analysis techniques (SEM and EDS). Results showed that the addition of Cr and Cu showed a slight positive effect on the corrosion resistance at pH 4.0 and 25oC. At pH 6.6 and 80oC, regardless of the alloying elements, the trend of corrosion rate with time was similar, i.e., the corrosion rate of all specimens decreased with time due to the formation of protective FeCO3. A beneficial effect of Cr addition was clearly seen at pH 5.9 and 70oC, where steel sample without Cr showed no decrease in corrosion rate with time. The addition of Cr promotes the formation of protective FeCO3 and it decreases the corrosion rate.

Key words: CO2 corrosion, carbon steel, alloying element, FeCO3

Product tags
Also Purchased
Picture for The Effect of High Partial Pressure of CO2 on the Corrosion Mechanism of Carbon Steel in H2O-CO2 Systems
Available for download

51318-11623-The Effect of High Partial Pressure of CO2 on the Corrosion Mechanism of Carbon Steel in H2O-CO2 Systems

Product Number: 51318-11623-SG
Author: Tatiana C. Almeida / Oscar R. Mattos / Rogaciano M. Moreira / Merlin C. E. Bandeira
Publication Date: 2018
$20.00

The corrosion mechanism of X65 carbon steel was evaluated in water environment by increasing CO2 partial pressure from 1 bar at 24 °C to 110 bar at 40 °C, reaching conditions that include water saturated with supercritical CO2.
Picture for 06112 FUNDAMENTAL ASPECTS OF CO2 METAL LOSS
Available for download

06112 FUNDAMENTAL ASPECTS OF CO2 METAL LOSS CORROSION – PART II: INFLUENCE OF DIFFERENT PARAMETERS ON CO2 CORROSION MECHANISMS

Product Number: 51300-06112-SG
ISBN: 06112 2006 CP
Author: Guenter Schmitt, Michaela Hörstemeier
Publication Date: 2006
$20.00

The literature has been reviewed with respect to information gained in the recent 20 years on CO2 corrosion of materials used in the oil and gas industry. The paper discusses the effect of materials related, medium-related and interface-related parameters on general (uniform) and localized corrosion.  Part II
Picture for Localized Corrosion of Mild Steel under Iron Sulfide Layers in CO2/H2S Environment
Available for download

51318-10990-Localized Corrosion of Mild Steel under Iron Sulfide Layers in CO2/H2S Environment

Product Number: 51318-10990-SG
Author: Saba Navabzadeh Esmaeely / Gheorghe Bota / Bruce Brown / Srdjan Nesic
Publication Date: 2018
$20.00

Mild steel specimens (API 5L X65) were pretreated to form a pyrrhotite layer on the surface using high temperature sulfidation in oil, then exposed to a range of aqueous CO2 and H2S corrosion environments, leading to initiation of localized corrosion.

 
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support