Effect of Normalising Process on the Corrosion Behaviour of U75V Rail Flash Butt Welded Joints in a Marine Environment

Author:

Zhang Xi,Liao Tingting,Lv Qibing,Gou Guoqing

Abstract

U75V rail steel is widely used in railways in China, including train tunnels in mountain and subsea projects, where it suffers from selective corrosion near welded joints. To ensure adequate railway service life, this study examines the effect of the normalisation process on the electrochemical behaviour of U75V rail-welded joints (URWJs) manufactured by flash butt welding (FBW) using potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS). Corrosion morphology and elemental distribution analyses were performed to investigate the corrosion behaviour. The results show that the grains within the joints became finer and more homogeneous after normalisation, with a lower corrosion rate and higher corrosion resistance. It is demonstrated that fewer corrosion products were formed on the surface of the normalised joints after electrochemical test, and the corrosion resistance of the URWJs improved, owing to the formation of denser passivation films caused by normalisation. These mechanisms of corrosion response help explain corrosion failure in railway lines, as well as also help optimise the welding process and normalising processes to obtain a corrosion-resistant microstructure and ensure the quality of welded joints.

Funder

Research and development project of electromagnetic ultrasonic welding residual stress testing equipment

Publisher

MDPI AG

Subject

General Materials Science,Metals and Alloys

Reference36 articles.

1. Study on Microstructure and Mechanical Properties of Flash Butt Welded Joint of NS700 Acid-resistant Steel;Jiang;Hot Work. Technol.,2017

2. Microstructure and mechanical properties of a flash butt welded pearlitic rail;Porcaro;J. Mater. Process. Technol.,2019

3. Influence of welding on microstructure and strength of rail steel;Sarikavak;Constr. Build. Mater.,2020

4. Effect of preheating/post-isothermal treatment temperature on microstructures and properties of cladding on U75V rail prepared by plasma cladding method;Ding;Surf. Coat. Technol.,2020

5. Microstructure and mechanical properties of directed energy deposited U75V/15–5PH structurally graded material;Zhang;J. Alloy. Compd.,2022

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