Search
Filters
Close

Theoretical Study of Corrosion of Corrosion-Resistant Alloys in Chemical Processes Environments including Mixed Acids and Salts using a Mechanistic Model

Product Number: 51321-16479-SG
Author: Ali Eslamimanesh/ Andre Anderko/ Malgorzata M. Lencka
Publication Date: 2021
$0.00
$20.00
$20.00

Corrosion-resistant alloys (CRAs) are often employed in aggressive environments including pure acids as well as their mixtures with or without salts to mitigate corrosion risks. However, corrosion behavior of such alloys in wide ranges of process conditions needs to be reliably predicted. In this work, a previously developed model database is extended and refined to study the corrosion behavior of a group of nickelbase alloys (22, 28, 276, 625, 825, and 2550) and a martensitic stainless steel (S13Cr) in systems relevant to chemical processes, particularly in acids and their mixtures. The computational framework comprises a thermodynamic model for predicting speciation and an electrochemical model for predicting alloy dissolution due to anodic and cathodic processes. The framework also includes a repassivation potential model for localized corrosion. A comprehensive database of relevant experimental data from the literature has been collected in order to refine the parametrization of the model. The same modeling framework has been used to evaluate localized corrosion of the alloys in systems relevant to oil and gas production by calculating corrosion rate, corrosion potential, and repassivation potential as a function of environment speciation, temperature, pH, and partial pressure of gases including CO2 and H2S. The results show acceptable accuracy of the model in representing the literature data.

Key words: Corrosion resistant alloys, acid corrosion, salts, nickel-base alloys, electrochemical modeling, chemical processes environments, localized corrosion

Corrosion-resistant alloys (CRAs) are often employed in aggressive environments including pure acids as well as their mixtures with or without salts to mitigate corrosion risks. However, corrosion behavior of such alloys in wide ranges of process conditions needs to be reliably predicted. In this work, a previously developed model database is extended and refined to study the corrosion behavior of a group of nickelbase alloys (22, 28, 276, 625, 825, and 2550) and a martensitic stainless steel (S13Cr) in systems relevant to chemical processes, particularly in acids and their mixtures. The computational framework comprises a thermodynamic model for predicting speciation and an electrochemical model for predicting alloy dissolution due to anodic and cathodic processes. The framework also includes a repassivation potential model for localized corrosion. A comprehensive database of relevant experimental data from the literature has been collected in order to refine the parametrization of the model. The same modeling framework has been used to evaluate localized corrosion of the alloys in systems relevant to oil and gas production by calculating corrosion rate, corrosion potential, and repassivation potential as a function of environment speciation, temperature, pH, and partial pressure of gases including CO2 and H2S. The results show acceptable accuracy of the model in representing the literature data.

Key words: Corrosion resistant alloys, acid corrosion, salts, nickel-base alloys, electrochemical modeling, chemical processes environments, localized corrosion

Also Purchased
Picture for 02213 THE INFLUENCE OF ENVIRONMENTAL FACTORS...
Available for download

02213 THE INFLUENCE OF ENVIRONMENTAL FACTORS ON THE CREVICE CORROSION OF ALLOY 625 IN NATURAL SEAWATER

Product Number: 51300-02213-SG
ISBN: 02213 2002 CP
Author: F. J. Martin, P. M. Natishan, K. E. Lucas, E. A. Hogan, A. M. Grolleau, and E. D. Thomas
$20.00
Picture for 01141 CREVICE CORROSION STABILIZATION AND
Available for download

01141 CREVICE CORROSION STABILIZATION AND REPASSIVATION BEHAVIOR OF ALLOYS 625 AND 22

Product Number: 51300-01141-SG
ISBN: 01141 2001 CP
Author: B. A. Kehler, G.O. Ilevbare and J.R. Scully
$20.00
Picture for 01004 H2S RESISTANT MATERIALS FOR OIL&GAS
Available for download

01004 H2S RESISTANT MATERIALS FOR OIL&GAS PRODUCTION

Product Number: 51300-01004-SG
ISBN: 01004 2001 CP
Author: J. Klower, H. Schlerkmann, and R. Popperling
$20.00