Effect of post-weld heat treatment on corrosion resistance of X90 pipeline steel joints
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Defen Zhang
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Qingzheng Ran
Abstract
In order to improve the corrosion resistance of welded joints, X90 pipeline steel joints were subjected to post-weld heat treatment at 610 °C, 640 °C, and 670 °C (holding time was 1 h). Through electrochemical corrosion and full immersion corrosion experiments, the corrosion resistance of welded joints under various conditions was tested, and the surface morphology and corrosion products of the corroded samples were analyzed by scanning electron microscopy and X-ray diffraction analysis. The experimental results show that the corrosion products of X90 pipeline steel welded joints in simulated soil solution mainly include Fe(OH)3, γ-FeOOH, α-Fe2O3, γ-Fe2O3, and a small amount of Fe3O4, FeCl3 and Fe. After heat treatment at 610 °C, the corrosion current density of the parent metal, heat-affected zone, and weld metal of the joint changes from 1.081, 2.889, 2.079 (×10−5 A cm−2) to 0.977, 2.211, 1.810 (×10−5 A cm−2), respectively, the corrosion resistance is improved.
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Research ethics: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission
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Competing interests: The authors state no competing interests.
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Research funding: This work was supported by Open Fund (PLN 2021-20) of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University) and the National Natural Science Fund of China (Fund Number 51774249).
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Data availability: The raw data can be obtained on request from the corresponding author.
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Artikel in diesem Heft
- Frontmatter
- Original Papers
- Fabrication of magnetically separable Ag–ZnFe2O4 hollow nanospheres with efficient photocatalytic activity
- Optimization of magnetic properties of MnFe2O4 by modulating molarity of NaOH as precipitating agent
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- Exploring the functional abilities of PVA–combeite composites as potential candidates for bone substitutes
- Study of optical, structural and radiation shielding properties of (55 − x)TeO2–20ZnO–25B2O3–xEr2O3 glass matrix
- Effect of post-weld heat treatment on corrosion resistance of X90 pipeline steel joints
- Microstructure and residual stress distribution of electron beam-welded joints of a 50 mm-thick TA15 titanium alloy plate
- News
- DGM – Deutsche Gesellschaft für Materialkunde
Artikel in diesem Heft
- Frontmatter
- Original Papers
- Fabrication of magnetically separable Ag–ZnFe2O4 hollow nanospheres with efficient photocatalytic activity
- Optimization of magnetic properties of MnFe2O4 by modulating molarity of NaOH as precipitating agent
- Effect of synthesis method on structural and magnetic properties of La0.7Ca0.2Ba0.1MnO3
- Exploring the functional abilities of PVA–combeite composites as potential candidates for bone substitutes
- Study of optical, structural and radiation shielding properties of (55 − x)TeO2–20ZnO–25B2O3–xEr2O3 glass matrix
- Effect of post-weld heat treatment on corrosion resistance of X90 pipeline steel joints
- Microstructure and residual stress distribution of electron beam-welded joints of a 50 mm-thick TA15 titanium alloy plate
- News
- DGM – Deutsche Gesellschaft für Materialkunde
