Investigating the effect of solution annealing on corrosion resistance and hardness property of AISI 1036 welded steel in chloride environment using electrochemical noise method

Authors : Oghenerobo Awheme, Basil Obimma Onyekpe

Pages : 38-47

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Publication Date : 2024-06-30

Article Type : Research

Abstract :The outcomes derived from the investigation into the influence of solution-annealed AISI 1036 welded steel on the corrosion resistance and hardness properties in a chloride environment are presented in this paper. The solution-annealed steel samples were austenitized at a temperature of 990 oC and soaked for 2 hours to ensure complete homogenization and thereafter cooled in water. The control and the heat-treated samples were exposed to a chloride solution for corrosion investigation. Corrosion rates were examined for at the parent metal (PM), heat affected zone (HAZ), and welded zone (WZ) using the Potentiostatic measurement method (PMM), and hardness tests were conducted using Vickers microhardness testing (VMT). The results obtained from the hardness testing showed that the solution-annealed samples have higher hardness properties than the control samples at the welded zone, heat-affected zone, and the parent metal. When exposed to corrosion, the obtained corrosion rate showed that the solution-annealed samples were found to be more noble in the chloride environment than the control samples. The corrosion resistance of the samples was observed to decrease from the parent metal (PM), to the heat-affected zone (HAZ), and the welded zone (WZ) exhibited the least resistance. From the results obtained, the solution-annealed welded steel specimens seemed to be better suited for application in a chloride environment since they showed superior resistance throughout the exposure period.
Keywords : Carbon steel, Solution Annealing, Corrosion Resistance, Electrochemical Noise, Hardness property, Chloride Environment