The successful burning of heavy fuel in gas turbines depends on the additive to prevent hot corrosion of hot gas path components, to prevent vanadium hot corrosion in the turbine hot gas path, a minimum ratio of magnesium to vanadium is required. In this work a number of oil-soluble and oil dispersible inhibitors were prepared to give a variety of magnesium complexes of different metal content and oil - solubility, these include; 1- Magnesium carboxylate which include : magnesium laurate, magnesium arachidate, magnesium palmitate, magnesium oleate,magnesium stearate, magnesium Cyclohexane carboxylate, magnesium benzoate, magnesium cinnamate, magnesium adipate, magnesium phthalate and magnesium terphthalate.2-Magnesium sulfonate. 3- Water - Oil emulsion magnesium derivatvies. The emulsion were prepared following two routs; a- by using sodium laural sulfonate as surfactant and magnesium chloride as magnesium salt.b- by using magnesium salfonate as surfuctant and magnesium acetate as magnesium salt.The prepared complexes were charachtarized by their FTIR spectra and their melting points.The solubility testes show that the oleate complex of magnesium was found to have the highest oil solubility among the carboxylate derivatives.The metal analysis, using atomic absorption specrtroscopy, show the magnesium percent as followes : Mg-arachidate < Mg-oleate < Mg-stearate < Mg-palmitate < Mg-laurate < 3.12% 3.52% 3.64% 4.17% 5.06% Mg-cinnamate < Mg-benzoate < Mg-Cyclohexane carboxylate < 7.23% 8.39% 8.75% Mg-phthalate < Mg-terphthalate < Mg-adipate 12.28% 12.33% 13.35
While the sulfonate derrivative had (4.15 % Mg).The magnesium percent of the emulsion prepared by rout (a) was (8.5 %) and that of rout ( b ) was ( 13.5 % ).