SYNTHESIS AND UTILIZING NANOPOROUS MATERIAL FROM PARTIALLY LATERISED KHONDALITE ROCK FOR CORROSION STUDIES

Abstract

Partially Laterised Khondalite (PLK) rocks are a bauxite mining waste generated during the mining of the bauxite for the production of alumina. This waste can be transformed into a nanoporous material after a suitable physical beneficiation followed by a chemical activation process. In this paper, the nanoporous material was synthesized from the partially laterised khondalite (PLK) rocks, which was applied to a mild steel in the medium of hydrochloric acid of one molar (1 M) concentration. The characterisation study has been carried out on the raw material and the nanoporous material. The characterisation study included XRD, FTIR, SEM, TEM, BET. It was observed that the structural transformation occurs with an increase in surface area from 8.4 m²/g to 162.7 m²/g. The different experiments were carried out to reveal that the material acts as an efficient corrosion inhibitor by using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, and weight-loss experiments. It is found that the maximum inhibition efficiency of 92.5% achieved after dipping in the sea water for 72 hours. The resulting material improves performance and environmental impact while providing a more economical and sustainable option for creating anticorrosive coatings.