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Pipeline steel with resistance to microbiological corrosion

A technology with corrosion performance and microbial resistance, applied in the field of pipeline steel, it can solve the problems of not considering the microbial corrosion resistance of materials, and achieve the effects of excellent microbial corrosion resistance, improved matrix strength, and improved precipitation behavior.

Active Publication Date: 2017-01-18
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The pipeline steels that have been in service or existing have not considered the performance of the material itself to be resistant to microbial corrosion, either in terms of chemical composition or production process

Method used

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  • Pipeline steel with resistance to microbiological corrosion
  • Pipeline steel with resistance to microbiological corrosion
  • Pipeline steel with resistance to microbiological corrosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, the chemical composition of the pipeline steel is (% by weight):

[0028] C: 0.030%, Si: 0.14%, Mn: 1.09%, Cu: 1.06%, Ni: 0.32%, Mo: 0.31%, Cr: 0.32%, Nb: 0.05%, V: 0.02%, the rest is Fe; impurities The element content is: S: 0.0011%, P: 0.0050%.

[0029] The aging heat treatment process of the above-mentioned pipeline steel is as follows: after hot rolling, the temperature is raised to 500° C., kept for 1 hour, and then air-cooled.

[0030] Antibacterial results such as figure 1 As shown in (b), it can be seen that compared with the reference sample X80 commercial pipeline steel, the pipeline steel of the present invention has excellent bactericidal ability, and the bactericidal rate and mechanical performance tests are shown in Table 1.

Embodiment 2

[0032] In this embodiment, the chemical composition of the pipeline steel is (% by weight):

[0033] C: 0.020%, Si: 0.12%, Mn: 1.03%, Cu: 1.46%, Ni: 0.31%, Mo: 0.31%, Cr: 0.31%, Nb: 0.05%, V: 0.02%, the rest is Fe; impurities The element content is: S: 0.0011%, P: 0.0050%.

[0034] The aging heat treatment process of the above-mentioned pipeline steel is as follows: after hot rolling, the temperature is lowered to 500°C, kept for 1 hour, and then air-cooled. The sterilization rate and mechanical performance tests are shown in Table 1.

Embodiment 3

[0036] In this embodiment, the chemical composition of the pipeline steel is (% by weight):

[0037] C: 0.035%, Si: 0.18%, Mn: 0.82%, Cu: 1.23%, Ni: 0.37%, Mo: 0.39%, Cr: 0.40%, Nb: 0.04%, V: 0.02%, the rest is Fe; impurities The element content is: S: 0.0014%, P: 0.0050%.

[0038] The aging heat treatment process of the above-mentioned pipeline steel is as follows: after hot rolling, the temperature is lowered to 500°C, kept for 1 hour, and then air-cooled. The sterilization rate and mechanical performance tests are shown in Table 1.

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Abstract

The invention aims to provide a pipeline steel with resistance to microbiological corrosion on the premise of guaranteeing the advantages of conventional pipeline steel so as to substantially reduce the possibility of microbiological corrosion from material source. The pipeline steel provided by the invention comprises the following chemical components by weight: 0.020 to 0.030% of C, 0.10 to 0.15% of Si, 0.9 to 1.1% of Mn, 1.0 to 2.0% of Cu, 0.30 to 0.35% of Ni, 0.30 to 0.35% of Mo, 0.30 to 0.35% of Cr, 0.045 to 0.055% of Nb, 0.015 to 0.025% of V, no more than 0.0015% of S and no more than 0.0050% of P, with the balance being Fe. The elemental Cu is added into the pipeline steel, so after aging treatment, the pipeline steel has greatly improved strength and excellent microbiological corrosion resistance.

Description

technical field [0001] The invention belongs to the field of iron and steel materials, and in particular relates to a pipeline steel with microbial corrosion resistance. The Cu-containing pipeline steel of the invention can significantly reduce the risk of microbial corrosion in the use environment, and can be applied to the production of pipeline steel for oil and gas gathering and transportation. Background technique [0002] Microbial corrosion refers to the phenomenon of material corrosion caused or accelerated by microbial activities, which can occur in various places such as soil, seawater and oil fields. In the petroleum industry, microbial corrosion is considered to be an important cause of underground pipeline corrosion. Pipeline transportation engineering is the premise and basis for the development of oil and gas production and transportation, and is at the core of the value chain of the oil and gas industry. In recent years, with the continuous demand for the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D6/00
Inventor 单以银杨柯史显波严伟王威杨振国徐大可
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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