ROLE OF SODIUM-SALT OF ETHYL 1,3-INDANDIONE 2-CARBOXYLATE IN CORROSION INHIBITION AND ATOMIC-ABSORPTION SPECTROMETRY OF IRON

The effect of sodium salt of ethyl 1,3-indandione 2-carboxylate (NaEIC ) on corrosion of iron in 2M HCl has been studied using galvanostatic polarization method. The observed experimental data indicate that the compound used were of mixed type inhibitor. The adsorption of the comp ound was found to follow S-shaped adsorption isotherm. The effect of t emperature was studied in order to obtain the kinetic and thermodynami c parameters of the iron corrosion. The role of NaEIC was extended to atomic absorption investigation and determination of iron. Some organi c compounds and different ions did affect the absorbance of iron in a stoichiometric air-acetylene flame and this effect is removed in the p resence of NaEIC. The mechanism of elimination was illustrated. A prop osed procedure for atomic absorption spectrometry (AAS) determination of iron in synthetic mixture was elaborated.