Corrosion Resistance of Heat-Treated NST 37-2 Steel in Hydrochloric Acid Solution


Corrosion of metal components constitutes a major challenge in many engineering systems, with appropriate design, proper material selection, and heat treatment as commonly used control strategies. In this study, the corrosion behaviour of heat-treated (annealed, normalised, hardened, and tempered) NST 37-2 steel in three concentrations (1.0, 1.5 and 2.0 M) of hydrochloric acid solution was investigated using weight loss and electrode-potential methods. Results showed that corrosion rate increased with increase in acid concentration. The decreasing order of corrosion resistance was Tempered > Annealed > Normalised > Hardened > Untreated. The surface pictures of the heat-treated and untreated samples showed uniform and pitting corrosion with the latter becoming more pronounced as concentration increased.

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D. Fadare and T. Fadara, "Corrosion Resistance of Heat-Treated NST 37-2 Steel in Hydrochloric Acid Solution," Journal of Minerals and Materials Characterization and Engineering, Vol. 1 No. 1, 2013, pp. 1-7. doi: 10.4236/jmmce.2013.11001.

Conflicts of Interest

The authors declare no conflicts of interest.


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