Abstract: Colored W-S cluster compound films as decorative and anticonosive layers were coated on strrl surface by immevsing in W-S₄^2- solution. The results of FTIR, FIR, FTRaman, APS and AES analyses showed the existence of W-S-Fe, terminal WS and terminal WO bonds in the cluster films. The films were composed of the elements W, S, Fe and O. The valences of these elements are found to be +6, +6(+4), +3, -2 in the surface, and +6(+4), -2, +2, -2 in the internal layer of the films, respectively. A multimolecular layer structure of the films has been verified. The relative atomic percent contents and the thickness of the films were calculated at the constant elemental composition section on the AES profile curves. The longer the reaction time, the thicker the films. On heating at 250 in air for 2 hours the structure and distribution of the elements changed, while the composition and valence state of the elements in the films remained unchanged.

Key words: W-S cluster compound, colored passive film, steel surface