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51316-7723-Relative performance of two cast irons and two stainless steels under erosion-corrosion conditions

Picture for Relative performance of two cast irons and two stainless steels under erosion-corrosion conditions
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Product Number: 51316-7723-SG
ISBN: 7723 2016 CP
Author: George Karafyllias
Publication Date: 2016
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Erosion-corrosion is one of the most challenging material degradation processes that occur in engineering components that handle slurries. Materials that can withstand a combination of corrosive fluid with suspended particles are required to extend the service life of the hydraulic equipment. High chromium cast irons are favourable for these applications as the chromium carbides improve the wear resistance and simultaneously good corrosion resistance is obtained. In this study two white cast irons (a 38%Cr - austenitic matrix and 27%Cr - martensitic matrix) were evaluated along with an austenitic stainless steel (UNS S31600) and a martensitic stainless steel (UNS S42000). The experiments were carried out using a submerged jet apparatus in a testing medium of 3.5% NaCl containing sand particles. The most notable finding was that the relative performance of the tested materials varied by altering the testing conditions. At lower velocity and sand concentration the stainless steels performed slightly better than the white cast irons of the same metallurgical structure. At higher velocities and sand concentration however the converse performance was observed with the white cast irons exhibiting greater erosion-corrosion resistance compared to stainless steels. Further features of these complex phenomena became evident in the application of cathodic protection and in-situ corrosion monitoring.
Erosion-corrosion is one of the most challenging material degradation processes that occur in engineering components that handle slurries. Materials that can withstand a combination of corrosive fluid with suspended particles are required to extend the service life of the hydraulic equipment. High chromium cast irons are favourable for these applications as the chromium carbides improve the wear resistance and simultaneously good corrosion resistance is obtained. In this study two white cast irons (a 38%Cr - austenitic matrix and 27%Cr - martensitic matrix) were evaluated along with an austenitic stainless steel (UNS S31600) and a martensitic stainless steel (UNS S42000). The experiments were carried out using a submerged jet apparatus in a testing medium of 3.5% NaCl containing sand particles. The most notable finding was that the relative performance of the tested materials varied by altering the testing conditions. At lower velocity and sand concentration the stainless steels performed slightly better than the white cast irons of the same metallurgical structure. At higher velocities and sand concentration however the converse performance was observed with the white cast irons exhibiting greater erosion-corrosion resistance compared to stainless steels. Further features of these complex phenomena became evident in the application of cathodic protection and in-situ corrosion monitoring.
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51316-7719-Corrosiveness of External Environments on Buried Onshore Pipelines: A Bayesian Network Approach

Product Number: 51316-7719-SG
ISBN: 7719 2016 CP
Author: Angel Kowalski
Publication Date: 2016
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51316-7731-The Selection and Performance of Oil and Gas Biocides for Extended Microbial Control

Product Number: 51316-7731-SG
ISBN: 7731 2016 CP
Author: Jon Raymond
Publication Date: 2016
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Picture for Corrosion of Carbon Steel in Water Equilibriated with Liquid and Supercritical CO2
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51316-7740-Corrosion of Carbon Steel in Water Equilibriated with Liquid and Supercritical CO2

Product Number: 51316-7740-SG
ISBN: 7740 2016 CP
Author: Bjørn Morland
Publication Date: 2016
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