Corrosion Resistance Analysis of Hybrid Laser-MIG Welded Metal of X80 Pipeline Steel

Xinyi JIANG; Chunyan YAN; Qianwen ZHOU; Chen LI; Kezhao ZHANG; Yefeng BAO

doi:10.7512/j.issn.1001-2303.2022.04.08

Welding Technology | Views : 0 下载量: 304 CSCD: 0

PDF
Export
Share
Collection
Album

Corrosion Resistance Analysis of Hybrid Laser-MIG Welded Metal of X80 Pipeline Steel
Vol. 52, Issue 4, Pages: 51-57(2022)
Received：03 November 2021，

Revised：2022-03-20，

Published：30 April 2022
DOI： 10.7512/j.issn.1001-2303.2022.04.08
稿件说明：

移动端阅览

姜心怡，严春妍，周倩雯，等.X80管线钢激光-MIG复合焊焊缝耐腐蚀性分析［J］.电焊机，2022，52（4）：51-57. DOI： 10.7512/j.issn.1001-2303.2022.04.08.

JIANG Xinyi, YAN Chunyan, ZHOU Qianwen, et al.Corrosion Resistance Analysis of Hybrid Laser-MIG Welded Metal of X80 Pipeline Steel[J].Electric Welding Machine, 2022, 52(4): 51-57. DOI： 10.7512/j.issn.1001-2303.2022.04.08.

摘要

油气管道往往服役于恶劣环境，其焊接接头面临着严重的腐蚀问题，存在较大安全隐患。激光-电弧复合焊焊接效率高、变形小，已成为管道施工焊接领域具有良好应用前景的焊接方法。针对不同激光功率下X80管线钢激光-MIG复合焊焊缝的耐腐蚀性进行研究。分析焊接接头各区域显微组织分布，研究母材和不同激光功率下激光-MIG复合焊焊缝的极化曲线、交流阻抗谱和SEM表面腐蚀形貌，得到了激光功率对激光-MIG复合焊焊缝电化学腐蚀行为的影响规律。结果表明，激光-MIG复合焊焊缝的显微组织由针状铁素体、粒状贝氏体和先共析铁素体构成；随着激光功率的增加，粒状贝氏体数量减少，针状铁素体和先共析铁素体含量增加。母材和激光-MIG复合焊焊缝的极化曲线均无显著的钝化区，母材的腐蚀电流密度大于激光-MIG复合焊焊缝，电荷转移电阻小于激光-MIG复合焊焊缝。随着激光功率的增加，激光-MIG复合焊焊缝的耐腐蚀性先上升再下降，激光功率为3.0 kW时焊缝的耐腐蚀性最好。

Abstract

Oil and gas pipelines are often used in harsh environments

and their welded joints are facing serious corrosion problems and great potential safety hazards. Laser-arc hybrid welding has become a promising welding method in the field of pipeline construction welding due to its high welding efficiency and small deformation. Hence

corrosion resistance of hybrid laser-MIG welded metal of X80 pipeline steel under different laser powers was investigated. Microstructure distribution in different zones in the welded joints was analyzed. Polarization curves

electrochemical impedance spectroscopy and SEM corrosion morphology of base metal and weld metal with different laser powers were also investigated. Influence of laser power on electrochemical corrosion properties was obtained. The results show that microstructures in hybrid laser-MIG welded metal are mainly composed of acicular ferrite

granular bainite and proeutectoid ferrite. Less granular bainite and more acicular ferrite/proeutectoid ferrite formed in the hybrid laser-MIG welded metal with increasing laser power. The polarization curves of both base metal and hybrid laser-MIG welded metal show no obvious passivation region. The base metal exhibits a higher corrosion current density and a lower charge transfer resistance compared with that of the hybrid laser-MIG welded metal. With increasing laser power

the corrosion resistance increases first and then decreases. The hybrid laser-MIG welded metal with a laser power of 3.0 kW shows the best corrosion resistance.

关键词

Keywords

references

Acherjee B . Hybrid laser arc welding： State-of-art review ［J］. Optics and Laser Technology ， 2018 ， 99 ： 60 -

Zeng Huilin ， Xu Yuanbing ， Wang Changjiang ， et al . Research on laser-arc hybrid welding technology for long-distance pipeline construction ［J］. China Welding ， 2018 ， 27 （ 03 ）： 53 - 58 .

Zhang Fuling ， Liu Shuangyu ， Liu Fengde ， et al . Stability evaluation of laser-MAG hybrid welding process ［J］. Optics and Laser Technology ， 2019 ， 116 ： 284 -

陈辉，苟国庆，朱宗涛，等 . 激光-MIG复合焊工艺及其在轨道交通领域应用现状［J］. 电焊机， 2015 ， 45 （ 05 ）： 11 - 14 .

CHEN Hui ， GOU Guoqing ， ZHU Zongtao ， et al . Laser-compound MIG welding process and its application status in the field of rail transit ［J］. Electric Welding Machine ， 2015 ， 45 （ 05 ）： 11 - 14 .

陈迎春，王新华，王翠，等 . X65和X80管线钢在大港模拟土壤溶液中的阴极保护参数研究［J］. 表面技术 2018 ， 47 （ 06 ）： 218 - 223 .

CHEN Yingchun ， WANG Xinhua ， WANG Cui ， et al . Cathodic protection parameters of X65 and X80 pipeline steels in Dagang simulated soil solution ［J］. Surface Technology ， 2018 ， 47 （ 06 ）： 218 - 223 .

Wang Shuaixing ， Yin Xiaole ， Zhang Hao ， et al . Coupling effects of pH and dissolved oxygen on the corrosion behavior and mechanism of X80 steel in acidic soil simulated solution ［J］. Materials ， 2019 ， 12 （ 19 ）： 3175 .

曹睿，丁云，赵小康，等 . 管线钢焊接接头腐蚀与防护的研究进展［J］. 腐蚀科学与防护技术， 2017 ， 29 （ 6 ）： 657 - 663 .

CAO Rui ， DING Yun ， ZHAO Xiaokang ， et al . Research Progress on Corrosion and Protection of Welded Joints of Pipeline Steels ［J］. CORROSION SCIENCE AND PROTECTION TECHNOLOGY ， 2017 ， 29 （ 6 ）： 657 - 663 .

Javidi M ， Bekhrad S . Failure analysis of a wet gas pipeline due to localised CO 2 corrosion ［J］. Engineering Fai-lure Analysis ， 2018 ， 89 ： 46 - 56 .

Jafery K M ， Embong Z ， Othman N K ， et al . Initial stage of corrosion formation for X70 pipeline external surface in acidic soil （peat） environmen ［J］. Materials Today： Proceedings ， 2022 ， 51 ： 1381 - 1387 .

王晓香 . 国内外超大输量天然气管道建设综述［J］. 焊管， 2019 ， 42 （ 7 ）： 1 - 9 .

WANG Xiaoxiang . Overview of the construction of super-large transportation capacity natural gas pipelines at home and abroad ［J］. Welded Pipe and Tube ， 2019 ， 42 （ 7 ）： 1 - 9 .

JY/T 0585-2020 ［S］.

Ma Jing ， Feng Fan ， Yu Baiqing ， et al . Effect of cooling temperature on the microstructure and corrosion behavior of X80 pipeline steel ［J］. International Journal of Minerals， Metallurgy and Materials ， 2020 ， 27 （ 3 ）： 347 - 353 .

编辑部网址： http：//www.71dhj.com http://www.71dhj.com