Corrosion Behavior of a Predeformed Fe-Ni Lateritic Steel with Bainite Structure

Abstract:

In a railway track for intermodal usage between a train station to a port, an observation on corrosion behavior of the track alloy in the coastal environment needs to be considered. In this study, Fe-Ni lateritic steel with bainite structure is observed. This alloy is developed from lateritic ores in Indonesia as an alternative to the conventionally made Fe-Ni steels. This study aims to determine the effect of cold rolling and austempering processes on the corrosion properties of the alloy. The cold-rolling reductions used are 30% and 70%, followed by an austempering process at 400°C for 30 mins with air cooling. The corrosion test was performed on four different samples-- First, a before deformation sample. Second, 30% and 70% cold-rolled samples. Third, austempered without deformation samples. Besides, fourth, deformed austempered samples. The corrosion test method implemented was the CASS Method for 2, 4, and 6 days. The highest corrosion rate obtained by 30% cold rolling, and the corrosion rate is increased as the austempering addition. The microstructures of rust are approximately porous few compact, near to voluminous coarse-grain corrosion products, and tend to crack.

• Periodical: Key Engineering Materials (Volume 867)
• Pages: 8-16
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.867.8
• Online since: October 2020
• Authors: Miftakhur Rohmah*, Mochamad Syaiful Anwar, Rahadian Roberto, Fatayalkadri Citrawati
• Keywords: Bainite, Cold-Rolling, Corrosion, Laterite Steel, Rail Track, Salt Spray

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