Acidic Corrosion Behaviour of Niobium-Added Welding Overlays Fabricated by Self-Shielded Metal-Cored Wires

• Autorzy: Liu Dashuang , Wu Yucheng , Long Weimin , Wei Ping , Wang Rui , Zhou Wei

Identyfikatory

DOI

10.24425/amm.2023.145452

• Języki publikacji: EN

Abstrakty

EN

Both corrosion and abrasion remove materials from some engineering components such as impact coal crusher hammers, pulverizer rings, chute liner, and rolls or molds. Intensive research has been done on improving the wear resistance of high chromium alloys, however, studies into corrosion resistance of high chromium alloys are insufficient. In order to determine the amount of ferroniobium addition in the wire to achieve the best corrosion resistance, and find out the mechanism of ferroniobium enhancing the corrosion resistance of the welding overlays, the high-Cr iron-based welding overlays with different niobium addition were fabricated by using self-made self-shielded metal-cored wires and their acidic corrosion resistance in 3.5 wt.% NaCl solution + 0.01 mol/L HCl solution were investigated by electrochemical corrosion test. The microstructure and corrosion morphology were characterized by OM, SEM, XRD and EDS. The polarization curves and values of I_corr, E_corr and R_c indicate the corrosion resistance is at the highest with 3.6 wt.% niobium addition, and at the lowest when the niobium addition is 10.8 wt.%. The corrosion of welding overlay occurs in the matrix of microstructure. With the increase of niobium addition from 3.6 wt.% to 10.8 wt.%, the proportion of network eutectic structure in the welding overlay is increased. Up to 10.8 wt.%, the microstructure is transformed from hypereutectic structure into eutectic one, leading to a higher acceleration of corrosion rate. When niobium addition reaches 14.4 wt.%, the welding overlay is transformed into a hypoeutectic structure. The addition of niobium element consumes carbon element in the alloy, which makes the increase of chromium content in the final solidified matrix, leading to an improvement in corrosion resistance.

Słowa kluczowe

EN

acidic corrosion behavior; niobium addition; self-shielded metal-cored wire

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2023
• Tom: Vol. 68, iss. 3
• Strony: 887--894
• Opis fizyczny: Bibliogr. 20 poz., fot., rys., tab., wykr.

Twórcy

autor

Liu Dashuang

• Hefei University of Technology, School of Material Science and Engineering, Hefei 230009, China
• Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou 450001, China
• Jiangsu University of Science and Technology, School of Material Science and Engineering, Zhenjiang 212003, China

• https://orcid.org/0000-0002-8918-914X

autor

Wu Yucheng

• Hefei University of Technology, School of Material Science and Engineering, Hefei 230009, China

• https://orcid.org/0000-0002-1549-0546

autor

Long Weimin

• Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou 450001, China
• China Innovation Academy of Intelligent Equipment (Ningbo) Co., Ltd, Ningbo 315700, China

• https://orcid.org/0000-0002-6794-7608

autor

Wei Ping

• Jiangsu University of Science and Technology, School of Material Science and Engineering, Zhenjiang 212003, China

• https://orcid.org/0000-0002-9010-0405

autor

Wang Rui

• Jiangsu University of Science and Technology, School of Material Science and Engineering, Zhenjiang 212003, China

• https://orcid.org/0000-0003-2609-4255

autor

Zhou Wei

• Hefei University of Technology, School of Material Science and Engineering, Hefei 230009, China
• School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore

• https://orcid.org/0000-0002-1442-5910

Bibliografia

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Uwagi

This work is supported by China Postdoctoral Science Foundation Funded Project (Grant No. 2016M601753), Natural Science Foundation of Jiangsu Province (Grant No. BK20201453), Anhui Provincial Natural Science Foundation (Grant No. 2208085ME135), and Graduate Research and Innovation Projects of Jiangsu Province (Grant No. KYCX21_3450).