Enhanced Bio-corrosion Resistance by Cu Alloying in a Micro-alloyed Pipeline Steel

On the composition base of commercial X65 grade pipeline steels, a Cu modified pipeline steel was designed to show improved resistance to microbially induced corrosion (MIC). The mechanical properties of the Cu-added steel and its corrosion behavior in a soil solution inoculated with sulfate-reducin...

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Bibliographic Details
Published in:Acta metallurgica sinica : English letters 2022-10, Vol.35 (10), p.1731-1743
Main Authors: Zeng, Yunpeng, Yan, Wei, Shi, Xianbo, Yan, Maocheng, Shan, Yiyin, Yang, Ke
Format: Article
Language:English
Subjects:
Alloying
Bacteria
Biofilms
Carbon steel
Cathodic protection
Characterization and Evaluation of Materials
Chemistry and Materials Science
Copper
Corrosion
Corrosion and Coatings
Corrosion products
Corrosion resistance
Corrosion resistant steels
Electrodes
Impact tests
Materials Science
Mechanical properties
Metallic Materials
Microstructure
Nanotechnology
Organometallic Chemistry
Pipeline design
Pipelines
Scanning electron microscopy
Spectroscopy/Spectrometry
Stainless steel
Structural steels
Sulfate reduction
Toxicity
Tribology
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Summary:On the composition base of commercial X65 grade pipeline steels, a Cu modified pipeline steel was designed to show improved resistance to microbially induced corrosion (MIC). The mechanical properties of the Cu-added steel and its corrosion behavior in a soil solution inoculated with sulfate-reducing bacteria (SRB) were investigated in this work. The results demonstrated that Cu-added steel exhibits a good combination of strength and toughness. Cu ions released from the Cu-added steel could effectively kill the SRB attaching on the steel surface, thus evidently decreased the pit depth and diameter of Cu-added steel. Furthermore, during the long-term immersion, the Cu-rich film formed by the enrichment of Cu in the corrosion product layer on the steel surface could also contribute to the improvement of the bio-corrosion resistance of Cu-added steel.
ISSN:1006-7191
2194-1289
DOI:10.1007/s40195-022-01392-9