XPS characterization of new corrosion inhibitor: zinc aminophosphonate coordination complex
Annotatsiya
A new zinc aminophosphonate corrosion inhibitor (Zn ATMP ) containing the Zn–N bond in the coordination environment of zinc has been synthesized, separated and studied. The inhibition coefficient according to the all‐Union State Standard 9.502 is 14.7. The interaction of the metal‐coordination corrosion inhibitor Zn ATMP with the surface of carbon steel has been studied by X‐ray photoelectron spectroscopy. The structure of the protective layer, its stability in the temperature range of 300–575 K and the mechanism of thermal destruction have been investigated. It is shown that the interaction of the nitrogen‐containing chelate corrosion inhibitor with the steel surface leads to the formation of the surface protective layer, the atoms of which form strong covalent bonds Fe–O–P–Zn–N(C). Fe atoms pass into a high‐spin state. Thermal action on the protective film results in its destruction at 575 K. Copyright © 2014 John Wiley & Sons, Ltd.