Study the corrosion behavior of low carbon steel weldments immersed in tap water

Abid, Zenaa Moyaser; Ismael, Qays Hazim; Fathi, Mohammed Shaalan Abed

doi:10.30772/qjes.2024.149684.1233

	Study the corrosion behavior of low carbon steel weldments immersed in tap water
Al-Qadisiyah Journal for Engineering Sciences
Article 10, Volume 17, Issue 2, June 2024, Pages 165-177 PDF (573.97 K)
Document Type: Research Paper
DOI: 10.30772/qjes.2024.149684.1233
Authors
Zenaa Moyaser Abid; Qays Hazim Ismael; Mohammed Shaalan Abed Fathi^*
Department of Mechanical Engineering, College of Engineering, University of Mosul, 41002 Mosul, Iraq
Abstract
Corrosion is one of the main sources of failure for metals and alloys, thus it is a major engineering problem. Engineers must consider the corrosion of metals in different environments when designing engineering parts. Metals tend to corrode in different media; they show different behaviors due to differences in chemical composition and the severity of the corrosive medium. In tap water, the corrosion of mild steel products is an electrochemical phenomenon that includes two reactions: the dissolving of iron (anodic) and the reduction of oxygen (cathodic). This work observes the corrosion behavior of welded low-carbon steel by Friction Welding (FW), Shielded Metal Arc Welding (SMAW) , and MIG welding techniques using immersion tests in tap water at different periods. The results revealed that while the corrosion rate of Base Metal (BM) increases, it reaches a nearly steady state in the friction-welded and SMAW-welded samples. The difference in the corrosion rate of the welded samples can be attributed to changes in the concentrations of Cl^– and CaCO₃ ,as well as the pH values of the corrosive mediums. Pits could be observed in the microstructure of the nugget zone for all weldments.
Keywords
Corrosion; Mild steel weldments; Tap water; MIG; SMAW; FW

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