Study on corrosion mechanism of high-nitrogen steel laser-arc hybrid welded joints

Di Bai; Zhikun Yang; Mingying Chen; Hong Zhang; Fengde Liu; Genzhe Huang; Li Yang

doi:10.1088/2053-1591/abc372

Materials Research Express (Jan 2020)

Study on corrosion mechanism of high-nitrogen steel laser-arc hybrid welded joints

Di Bai,
Zhikun Yang,
Mingying Chen,
Hong Zhang,
Fengde Liu,
Genzhe Huang,
Li Yang

Affiliations

Di Bai: ORCiD; College of Mechanical and Electric Engineering, Changchun University of Science and Technology , Changchun 130022, People’s Republic of China; National Base of International Science and Technology Cooperation for Optics, Changchun 130022, People’s Republic of China
Zhikun Yang: College of Mechanical and Electric Engineering, Changchun University of Science and Technology , Changchun 130022, People’s Republic of China; National Base of International Science and Technology Cooperation for Optics, Changchun 130022, People’s Republic of China; Inner Mongolia First Machinery Group Co., Ltd, Baotou, 014032, People’s Republic of China
Mingying Chen: Department of Mechanical and Electrical Engineering, East University of Heilongjiang , Harbin 150066, Heilongjiang Province, People’s Republic of China
Hong Zhang: ORCiD; College of Mechanical and Electric Engineering, Changchun University of Science and Technology , Changchun 130022, People’s Republic of China; National Base of International Science and Technology Cooperation for Optics, Changchun 130022, People’s Republic of China
Fengde Liu: ORCiD; College of Mechanical and Electric Engineering, Changchun University of Science and Technology , Changchun 130022, People’s Republic of China; National Base of International Science and Technology Cooperation for Optics, Changchun 130022, People’s Republic of China
Genzhe Huang: College of Mechanical and Electric Engineering, Changchun University of Science and Technology , Changchun 130022, People’s Republic of China; National Base of International Science and Technology Cooperation for Optics, Changchun 130022, People’s Republic of China
Li Yang: College of Mechanical and Electric Engineering, Changchun University of Science and Technology , Changchun 130022, People’s Republic of China; National Base of International Science and Technology Cooperation for Optics, Changchun 130022, People’s Republic of China

DOI: https://doi.org/10.1088/2053-1591/abc372
Journal volume & issue: Vol. 7, no. 10
p. 106531

Abstract

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In this paper, the electrochemical microcorrosion behavior of High-nitrogen steel hybrid weld joints with different wires addition were investigated. Polarization curves measurement was conducted to evaluate the corrosion feature in 3.5% NaCl solution. Scanning electron microscopy (SEM) and x-ray diffraction (XRD) were used to analyze the specific corrosion behavior and pitting deepening mechanism induced by precipitated ferrite-dendrites. The experimental results showed that the addition of nitrogen-containing welding wire improved the corrosion resistance of whole weld joint. As a transitional region, the HAZ exhibited relative weak pitting resistance and severe shedding behavior. The coherent dendrites and similar complex geometries led to the accumulation of continuous corrosion channels. The XPS spectra results indicated that the additional nitrogen in the welding wire optimized oxide composition of the surface passive film.

Published in Materials Research Express

ISSN: 2053-1591 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Technology: Chemical technology
Website: https://iopscience.iop.org/journal/2053-1591

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