Menu
Search
Filters
Close
Menu

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

  • /
  • /
  • 51318-11623-The Effect of High Partial Pressure of CO2 on the Corrosion Mechanism of Carbon Steel in H2O-CO2 Systems
Picture for The Effect of High Partial Pressure of CO2 on the Corrosion Mechanism of Carbon Steel in H2O-CO2 Systems
Available for download

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.

Product Number: 51318-11623-SG
Author: Tatiana C. Almeida / Oscar R. Mattos / Rogaciano M. Moreira / Merlin C. E. Bandeira
Publication Date: 2018
Industry: Science of Corrosion
$0.00
$20.00
$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. To perform this kind of investigation, the experimental tests were conducted only with CO2, eliminating any other influence of anions present in the solution. Electrochemical impedance measurements and weight loss tests were performed at pH 4, monitored within the whole experiment time. In addition, optical and confocal microscopy analyses were carried out to assess the carbon steel specimens after the immersion tests. The gravimetric results indicated that the corrosive process was not accelerated by increasing the pressure in H2O-CO2 systems. Concerning CO2 participation in the iron dissolution mechanism, electrochemical impedance results did not evidence a direct reaction of CO2 on the free iron surface, even when exposed to water saturated with supercritical CO2. If CO2 has any influence in the anodic mechanism, it must be detect by further experiments, however it certainly will not act directly on the free iron surface.

Key words: CO2 corrosion, supercritical CO2, H2O-CO2 systems, electrochemical impedance.

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. To perform this kind of investigation, the experimental tests were conducted only with CO2, eliminating any other influence of anions present in the solution. Electrochemical impedance measurements and weight loss tests were performed at pH 4, monitored within the whole experiment time. In addition, optical and confocal microscopy analyses were carried out to assess the carbon steel specimens after the immersion tests. The gravimetric results indicated that the corrosive process was not accelerated by increasing the pressure in H2O-CO2 systems. Concerning CO2 participation in the iron dissolution mechanism, electrochemical impedance results did not evidence a direct reaction of CO2 on the free iron surface, even when exposed to water saturated with supercritical CO2. If CO2 has any influence in the anodic mechanism, it must be detect by further experiments, however it certainly will not act directly on the free iron surface.

Key words: CO2 corrosion, supercritical CO2, H2O-CO2 systems, electrochemical impedance.

Product tags
Also Purchased
Picture for Corrosion Inhibition of Carbon Steel under Supercritical CO2/H2S Environment
Available for download

51318-11193-Corrosion Inhibition of Carbon Steel under Supercritical CO2/H2S Environment

Product Number: 51318-11193-SG
Author: Yoon-Seok Choi / Shokrollah Hassani / Thanh Nam Vu / Srdjan Nesic
Publication Date: 2018
$20.00

Experiments were carried out in a 7.5L autoclave with two combinations of CO2 partial pressure and temperature and different H2S concentrations. Corrosion behavior of specimens was evaluated using electrochemical measurements and surface analytical techniques.
Picture for 05551 CO2 Corrosion Prediction Model - Basic
Available for download

05551 CO2 Corrosion Prediction Model - Basic Principles

Product Number: 51300-05551-SG
ISBN: 05551 2005 CP
Author: Stein Olsen, Statoil ASA; Anne Marie Halvorsen, Norsk Hydro ASA; Per G. Lunde, Norsk Hydro Americas;
Publication Date: 2005
$20.00

The NORSOK M-506 is an empirical model based on experiments undertaken in a single phase water flow loop. The data is from experiments with low content of iron ions in the water phase, and the model is thus regarded to give a fair representation of the maximum corrosion rate in a CO2 corrosion controlled system.
Picture for 03345 CORROSION AT HIGH CO2 PRESSURE
Available for download

03345 CORROSION AT HIGH CO2 PRESSURE

Product Number: 51300-03345-SG
ISBN: 03345 2003 CP
Author: S. M. Hesjevik, S. Olsen, Statoil, Marion Seiersten
$20.00
Categories
Industry
Recently viewed
Popular tags
View all
© NACE International. All Rights Reserved.
Contact FirstService