The effect of chemical composition on the corrosion and electrochemical behaviour of low alloy steel prepared by die-casting and ingot casting route has been investigated in 3.5% NaCI solution at pH 7.25. The experimental techniques used include constant immersion technique, in-situ corrosion monitoring, and potentiodynamic polarisation experiments. Surface examination and analytical studies were carried out using optical and scanning electron microscopy, XRD and non destructive evaluation. The objective of our work is to study some metallurgical characteristics of corrosion by NDE.The characterization of the microstructure modifications by eddy currents allows detecting mechanical and metallurgical parameters of materials will be compared to the results of electron microscopy and micro-hardness. Keywords: corrosion, immersion, carbon rate, EIS, eddy current, micro-hardness.
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