Half metallic ferromagnetism is reported in RbTiO₃ and CsTiO₃ compounds under the exchange correlation functions GGA, TB-mBJ and GGA+U using full potential linearized augmented plane wave method. Spin resolved calculations are carried out and implemented within the framework of density functional theory. The compounds exhibit energy band gap in spin up direction using three functional of PBE-GGA, TB-mBJ and GGA+U. A larger band gap is predicted to occur in both the compounds with the use of TB-mBJ potential. A higher value of magnetic moment is evidenced for RbTiO₃ and CsTiO₃ using PBE-GGA method as compared to mBJ and GGA+U methods. Curie temperature has been determined for the compounds at equilibrium and reduced volumes. It is reported that Curie temperature increases with the increase of hydrostatic pressure. With the help of second order elastic constants, Debye temperature and anisotropy factor have been predicted for the compounds.

Carbon steel was electroplated in presence of Ni salt, Diethylenetriamine pentamethylenephosphonic acid (DTPMP) and also ZnSO4. The various metal specimens are designated as CS, CS + Ni, CS + Ni + DTPMP, and CS + Ni + DTPMP + Zn. Weight loss study was carried by immersing the metal specimens in 3.5% NaCl solution for one day. The order of corrosion resistance is: CS + Ni + DTPMP + Zn > CS + Ni + DTPMP > CS + Ni > CS Polarization study was carried out by immersing the metal specimens is 3.5% NaCl solution. The order of corrosion resistance is: CS + Ni > CS + Ni + DTPMP + Zn > CS > CS + Ni + DTPMP The difference in corrosion resistance order derived from weight loss method and polarization method may be attributed to the fact that polarization method is an instantaneous method, whereas weight loss method is average method of longer duration, namely, one day. The electrochemically modified electrodes were used to decolourise methyl orange solution (250 ppm). The order of decolorization efficiency is: CS (100%) > CS + Ni + DTPMP(95%) > CS + Ni + DTPMP + Zn(92%) CS + Ni (40%)