Title: Comparison of corrosion behaviour on 18% Ni 250 grade maraging steel under weld aged condition in NaCl and H₂SO₄

Authors: Rama Pavan Kumar Varma Indukuri; Rama Murty Raju Penmetsa; Srinivasa Rao Chalamalasetti; Rajesh Siriyala

Addresses: Department of Mechanical Engineering, SRKR Engineering College (A), Bhimavaram, Andhra Pradesh-534204, India ' Department of Mechanical Engineering, SRKR Engineering College (A), Bhimavaram, Andhra Pradesh-534204, India ' Department of Mechanical Engineering Andhra University College of Engineering (A) Visakhapatnam, Andhra Pradesh-530003, India ' Department of Mechanical Engineering, SRKR Engineering College (A), Bhimavaram, Andhra Pradesh-534204, India

Abstract: Maraging steel sheets are used to manufacture components such as metal bellows that must withstand extreme temperatures and corrosion resistance in a variety of industries, including aircraft and aerospace. Laser beam welding is used to join maraging steel 250 plates with a thickness of 2 mm in this work. Under weld-aged conditions, the corrosion behaviour of 18% Ni MDN 250 grade maraging steel was examined in 1 M sulphuric acid (H₂SO₄) and 1 M sodium chloride (NaCl) solutions of equal concentrations. The potentiodynamic linear polarisation technique was used to conduct corrosion study. The results indicated that the corrosion rate increased with increasing laser power followed by welding speed and focal position. It is possible to improve the corrosion resistance of welded connections by adjusting the welding process parameters.

Keywords: maraging steel; similar welded joints; corrosion resistance; NaCl; H₂SO₄.

DOI: 10.1504/IJMATEI.2024.137539

International Journal of Materials Engineering Innovation, 2024 Vol.15 No.1, pp.66 - 80

Received: 29 Jun 2022
Accepted: 03 Oct 2022
Published online: 25 Mar 2024 *

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