INVESTIGATION ON INHIBITION MECHANISM OF COMPOSITE VOLATILE CORROSION INHIBITOR(VCI) FOR IRON RELICE
复合气相缓蚀剂对铁质文物缓蚀机理的研究

A new volatile corrosion inhibitor(VCI) was composed by hexamethylene tetramine and other amine-inhibitors A.The electrochemical behavior of the VCI on cast iron samples was studied by thin layer electrolyte test technique which could simulate the conditions of corrosion in atmospheres.The results showed that the VCI is a positive one.Through X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS),the film structure and inhibition mechanism of VCI on archaeological iron objects were studied.The results indicated that the VCI have well effect on rust layer of archaeological iron relics.The inhibition film could acceralate the transition of unstable rust layer to stable one and suppress further corrosion of the substrate.The VCI has a good protectiveness to iron relics.