Pipeline steel with sulfate reducing bacterium corrosion resistance performance
A technology for corrosion performance and pipeline steel, applied in the field of pipeline steel, can solve the problem of not taking into account the corrosion resistance of materials such as sulfate-reducing bacteria, achieve excellent resistance to sulfate-reducing bacteria corrosion, and reduce sulfate-reducing bacteria corrosion. effect of possibility
Inactive Publication Date: 2017-09-19
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology
Pipeline steels that have been in service or are not considered to be corrosion-resistant to sulfate-reducing bacteria
Method used
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Embodiment Construction
[0020] Example Pipeline steel was smelted and forged in a laboratory-scale vacuum induction furnace, followed by thermomechanically controlled rolling and controlled cooling. The existing commercial pipeline steel was used as a comparative example, and its chemical composition is shown in Table 1.
[0021] The chemical composition of table 1 embodiment and comparative example pipeline steel, (weight percentage, %)
[0022]
[0023]
[0024] All the pipeline steels in the examples adopt the best heat treatment process for copper precipitation: heat preservation at 550° C. for 1 hour, and air cooling. The pipeline steel of the comparative example kept the original rolling state.
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The invention provides pipeline steel with sulfate reducing bacterium corrosion resistance performance so as to remarkably lower the possibility of sulfate reducing bacterium corrosion from the perspective of materials. The steel comprises the following chemical components of, by weight, 0.10% or less of C, 0.50% or less of Si, 2.0% or less of Mn, Cu and the balance Fe and inevitable impurities, wherein the weight percentage of the Cu meets the relation of 1.5%<=Cu<=4.0%; and the steel can further comprise one or more of 0.6% or less of Ni, less than 0.3% of Mo, smaller than 0.3% of Cr, smaller than 0.05% of N and smaller than 0.05% of Ti. According to the pipeline steel, the risk of sulfate reducing bacterium corrosion in soil can be obviously reduced, and the pipeline steel can be applied to production of steel for underground pipelines.
Description
technical field [0001] The invention belongs to the field of iron and steel materials, and in particular relates to a pipeline steel with corrosion resistance to sulfate-reducing bacteria. The pipeline steel of the invention can significantly reduce the risk of sulfate-reducing bacteria corrosion in soil, and can be applied to the production of steel for buried pipelines. Background technique [0002] Microbial corrosion (MIC) refers to the phenomenon that the corrosion process of metal materials is directly or indirectly accelerated by the life activities of microorganisms and their metabolites. It is commonly found in various natural environments, such as soil, oil field systems, etc. one of the main reasons. The study found that the microbial corrosion of buried pipelines is mainly caused by anaerobic sulfate-reducing bacteria (SRB). Underground pipelines currently buried in the soil are often protected from corrosion with a combination of protective coatings and cathod...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C22C38/16C22C38/12C22C38/08C22C38/04C22C38/02C22C38/18C21D8/02
CPCC22C38/16C21D8/0247C22C38/02C22C38/04C22C38/08C22C38/12C22C38/18
Inventor 单以银史显波严伟王威杨振国闫茂成杨柯
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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