Adsorption of the Monohydrogen Nitrilotris(methylenephosphonato)hydroxylaminatonitrosyl Molybdate Complex on the Steel Surface and Its Thermochemical Behavior in the Isolated State and in Adsorbed Layers

Abstract

The adsorption and thermochemical behavior of the heteroleptic molybdenum(III) complex with nitrilotris(methylenephosphonic acid), hydroxylamine, and nitrogen(II) oxide are studied by X-ray photoelectron spectroscopy in situ. The adsorption of the complex on the steel surface is accompanied by the partial oxidation of molybdenum. Upon the thermal action, the free complex is reduced to Mo(II) and that in the adsorbed layer is reduced to metallic molybdenum. This makes it possible to use the complex described as a precursor for surface alloying of steel units.