Abstract
When creating structural molds and automobile parts, mild steel is employed in a number of technical applications. However, the material experiences corrosion when it is exposed to the environment and this leads to large economic impacts for applications using the metal. This research work discusses the effect of cooling media (water, air and oil) on the corrosion assessment of mild steel after heat treatment. The temperature for the polarization experiments was 260C, and the immersion periods ranged from one day (24 hours) to twelve days (288 hours). It was discovered that when the open circuit potential (OCP) measurement was carried out in the mild steel samples before heat treatment, the value initially changed to 0.0192 V, this then moved towards the negative to a value of -0.3716 V. The results show that in samples heat treated at 5000C, the efficiency is lower than when the temperature is increased to 9000C, where an improvement in efficiency is observed.
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