ON THE ADSORPTION OF VOLATILE CORROSION-INHIBITOR N,N-DIETHYLAMINOPROPIONITRILE ON IRON

Protective layers that are formed on an iron surface as a result of ad sorption of volatile corrosion inhibitor N,N-diethylaminopropionitrile (DEAPN) from a vapor phase were studied. The surface of specimens was studied by X-ray photoelectron spectroscopy (XPS) and ellipsometry. X PS data prove that the composition of DEAPN protective layers adsorbed by the iron surface from a vapor phase is similar to that for contact deposition. The chemisorbed layers formed from DEAPN vapors are thick er than those formed by contact deposition. Desorption of the physical ly sorbed layers is minor (28%). The protective layer forms by a power law for a period of 5 to 6 days and its thickness becomes about 3 nm after sorption for 5 days.