ANALYSIS AND MICROHARDNESS PROFILE OF HOT DIPPING COATING ON LOW-ALLOY STEEL

Abeer Shehab, Athil Al-Ezzi and Ali Al Katawy
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Abeer Shehab: College of Engineering, University of Diyala, Baquba. Diyala Governorate, Iraq
Athil Al-Ezzi: College of Engineering, University of Diyala, Baquba. Diyala Governorate, Iraq
Ali Al Katawy: College of Engineering, University of Diyala, Baquba. Diyala Governorate, Iraq

Surface Review and Letters (SRL), 2021, vol. 28, issue 03, 1-8

Abstract: This research is an effort to understand the morphology of the coating produced during hot dipping process in pure zinc bath based on iron–zinc phase diagram. In this investigation, zinc coating on low-alloy steel AISI 4340 samples was applied by hot dipping method followed by an annealing process. Morphological characterizations of the steel surface layer were accomplished by optical microscopy (OM) and scanning electron microscopy (SEM) equipped with energy-dispersive X-ray spectrometry (EDS). Results revealed that the coating is bonded to the steel surface through a sequence of Fe–Zn layers namely alpha (α), delta (δ) and zeta (ζ) with uniform sloping hardness profile.

Keywords: Low-alloy steel; hot dipping; phase analysis; microhardness; intermetallic compounds (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X20500596

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