A novel class of interesting polyurea derivatives 6a-c and 7a-c was synthesized using solution polycondensation technique by the interaction of 1 mole of bis (2- aminothiazol-4-ylbenzylidene)cycloalkanones monomers 3a,b with one moles of diisocyanate compounds in pyridine. The model compounds 4 and 5 were synthesized by the interaction of one mole of monomers 3a or 3b with two moles of phenylisocyanate in pyridine and their structures were confirmed by correct elemental and spectral analyses. The resulting polymers were characterized by elemental and spectral analyses, beside solubility and viscometry measurements. X-ray analysis showed these polymers having high degree of crystallinity in the region 2θ=5– 60°. In addition, the morphological properties of selected examples were tested by SEM, and the electrical properties of these polymers were measured. Moreover the corrosion inhibition behavior of diarylidenecycloalkanone monomers and selected examples of polyurea derivatives were carried out on steel in 0.5 M H2SO4 at 40°C giving cathodic, anodic and mixed inhibition.