Abstract

Zeolite NaA and zeolite NaY coating on mild steel has been assessed in the current study. The synthesized zeolite NaA and NaY samples have also been studied using X-ray powder diffraction (XRD) method and scanning electron microscopy (SEM), and the samples with different concentrations of zeolite have been tested for its corrosion resistance property for against H2SO4 acid at temperatures up to 60 °C under stagnant as well as stirred conditions by polarization/impedance method. Zeolite NaA and NaY were dispersed in cyanoacrylate-based adhesive in the ratio 1:20 and coated on mild steel for the formation of membrane. XRD analysis revealed the formation of zeolite coating on mild steel substrate. Microstructure analysis using SEM images of the coated samples showed the formation of cubic structure. The coated zeolite layer consisted of top layer with thickness of 2.4–3.6 µm. Results from polarization/impedance revealed that zeolite NaA is more corrosion resistant than zeolite NaY having inhibition efficiency of 89.2 %.

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