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Title: Effects of CO2 and H2S on Corrosion of Martensitic Steels in Brines at Low Temperature

Journal Article · · Corrosion
DOI:https://doi.org/10.5006/2406· OSTI ID:1461642
 [1];  [2];  [2];  [2];  [3];  [2]
  1. Pennsylvania State Univ., University Park, PA (United States); National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
  2. Pennsylvania State Univ., University Park, PA (United States)
  3. National Energy Technology Lab. (NETL), Albany, OR (United States)

Corrosion studies were conducted for martensitic carbon steels in 5 wt% NaCl brine solutions at 4°C and 10 MPa (1,450 psi). These studies simulated different subsurface environments relevant to Arctic drilling. Here, two high-strength martensitic carbon steels, S-135 and UD-165, were studied in three different environments: (1) a CO2-NaCl-H2O solution with a CO2:H2O molar ratio of 0.312 in the whole system, (2) an H2S-NaCl-H2O solution with an H2S:H2O molar ratio of 3.12 × 10–4, and (3) a CO2-H2S-NaCl-H2O solution with the same acid gas to water ratios as environments 1 and 2. Results from the CO2+H2S mixed environment indicated that sour corrosion mechanism was dominant when the CO2:H2S molar ratio was 1,000. This impact of a small amount of H2S on the corrosion mechanism could be attributed to the specific adsorption of H2S on the steel surface. Electrochemical and mass loss measurements showed a distinct drop in the corrosion rate (CR) by more than one order of magnitude when transitioning from sweet to sour corrosion. This inhibiting effect on CR was attributed to the formation of a protective sulfide thin film. Tafel analyses of the anodic reaction showed that the Bockris mechanism was unlikely in the conditions tested. As a result, when comparisons were made between modeled and experimental CRs, good agreement was found in the CO2-only and H2S-only environments, but not in the CO2+H2S environment.

Research Organization:
National Energy Technology Lab. (NETL), Albany, OR (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
OSTI ID:
1461642
Journal Information:
Corrosion, Vol. 74, Issue 3; ISSN 0010-9312
Publisher:
NACE InternationalCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

References (35)

The Role of  H 2 S  in the Corrosion and Hydrogen Embrittlement of Steel journal March 1982
Electrochemical Corrosion of Ultra-high Strength Carbon Steel in Alkaline Brines Containing Hydrogen Sulfide journal September 2016
Corrosion of Iron in an H2S-CO2-H2O System journal March 1962
Electrochemical and Sulfide Stress Corrosion Cracking Behaviors of Tubing Steels in a H2S/CO2 Annular Environment journal February 2014
XPS Investigation on the Corrosion Behavior of 13Cr-Martensitic Stainless Steel in CO2-H2S-ClEnvironments journal October 1989
Electrochemical corrosion behavior of carbon steel under dynamic high pressure H2S/CO2 environment journal December 2012
Electrochemical Model of Mild Steel Corrosion in a Mixed H 2 S/CO 2 Aqueous Environment in the Absence of Protective Corrosion Product Layers journal March 2015
Environmentally Assisted Cracking of Drill Pipes in Deep Drilling Oil and Natural Gas Wells journal May 2011
Kinetics of Corrosion Layer Formation. Part 2—Iron Sulfide and Mixed Iron Sulfide/Carbonate Layers in Carbon Dioxide/Hydrogen Sulfide Corrosion journal July 2008
Effect of bicarbonate on corrosion of carbon steel in CO2 saturated brines journal November 2011
Corrosion, Passivity, and Pitting of Carbon Steel in Aqueous Solutions of HCO 3 , CO 2 , and Cl journal September 1993
An Electrochemical Model for Prediction of Corrosion of Mild Steel in Aqueous Carbon Dioxide Solutions journal April 1996
Iron Corrosion in CO[sub 2]/Brine at Low H[sub 2]S Concentrations: An Electrochemical and Surface Science Study journal January 2009
Effect of H2S on Fe corrosion in CO2-saturated brine journal November 2009
Effect of H2S on the CO2 corrosion of carbon steel in acidic solutions journal January 2011
Combined Effect of Carbon Dioxide, Hydrogen Sulfide, and Acetic Acid on Bottom-of-the-Line Corrosion journal January 2011
Corrosion of Carbon Steel in Carbon Dioxide-Saturated Solutions Containing Small Amounts of Hydrogen Sulfide journal April 1995
Fate of Rising CO2 Droplets in Seawater journal August 2005
Solubility of CO 2 in water and NaCl solution in equilibrium with hydrate. Part I: Experimental measurement journal February 2016
Thermodynamic Properties of Aqueous Sodium Chloride Solutions journal January 1984
A speciation-based model for mixed-solvent electrolyte systems journal December 2002
A Method For Determining Corrosion Rates From Linear Polarization Data journal September 1958
The effect of H2S concentration on the corrosion behavior of carbon steel at 90°C journal June 2010
The Influence of pH on Localized Corrosion Behavior of X65 Carbon Steel in CO 2 -Saturated Brines journal December 2015
Electrochemical Study and Modeling of H 2 S Corrosion of Mild Steel journal April 2014
The Formation of Ferrous Monosulfide Polymorphs during the Corrosion of Iron by Aqueous Hydrogen Sulfide at 21°C journal January 1980
The influence of hydrogen sulfide on corrosion of iron under different conditions journal October 2000
A Mechanistic Model for Carbon Dioxide Corrosion of Mild Steel in the Presence of Protective Iron Carbonate Films—Part 1: Theory and Verification journal May 2003
On the fundamentals of electrochemical corrosion of X65 steel in CO2-containing formation water in the presence of acetic acid in petroleum production journal January 2009
The Corrosion of Steel by Aqueous Solutions of Hydrogen Sulfide journal June 1980
Corrosion of Iron in Acid Solutions with Hydrogen Sulfide journal May 1998
Definition of the transfer coefficient in electrochemistry (IUPAC Recommendations 2014) journal February 2014
Some Observations on Corrosion of Carbon Steel in Aqueous Environments Containing Carbon Dioxide journal February 1986
Computation of Rates of General Corrosion Using Electrochemical and Thermodynamic Models journal March 2001
Corrosion of Iron in on H2S-CO2-H2O System: Corrosion Film Properties on Pure Iron journal October 1963

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