XPS study of electroless NiP coating on iron substrate

X-ray photoelectron spectroscopy and x-ray-induced Auger electron spectroscopy analyses were performed to characterize NiP coating on the iron substrate. This electroless coating is commonly used for its outstanding corrosion resistance, but it is currently of interest as a hydrogen permeation barrier (HPB) for green hydrogen storage and transportation; thus, NiP coatings are relevant for energy and for the environment.