Anticorrosive properties of pulsed laser deposition thin films of magnesium based pseudo-binary oxide materials on steel

Abstract

Magnesium based pseudo binary oxide nanomaterials were obtained by hydrothermal synthesis at 250 °C. MgTa₂O₆, MgNb₂O₆, MgTa₂O₈ and MgNb₂O₈ nanomaterials were used to deposit mono layers and sandwich structures using the pulsed laser deposition technique on alloy steel tubes disks. The morphologies and the roughnesses of the deposited layers were evaluated by using the scanning electron microscopy and the atomic force microscopy investigation techniques. Also, the corrosion inhibition properties of the deposited layers were determined using electrochemical measurements in a 0.05 M H₂SO₄ medium. The best inhibition efficiencies were obtained in the cases of the sandwich structures, the largest value for the inhibition efficiency being obtained for the MgTa₂O₈ / MgNb₂O₈ combination, i. e. 87.03 %.