The interactions between the metal and its environment are responsible for the electrochemical reactions leading to corrosion. To avoid further degradation and in general the appearance of corrosion products, a corrosion inhibitor must be applied on the metallic surface to reduce or prevent the corrosion of exposed metal in a corrosive environment. Corrosion inhibitors are one of the different methods used by conservation-restoration professionals to preserve metallic cultural heritage. The present case study is concerned with preserve and controls the corrosion of the iron entrance door/gate of the clock tower of Muhammad Ali mosque at Salah Ed-din Cairo citadel-Egypt, by using an environmentally friendly Corrosion inhibitor. 1-butyl-1-pyrrolidinium chloride Ionic Liquid is of attentiveness since there has been a growth in ecological consciousness and a variation in guidelines that control the toxicity of systematic corrosion inhibitors. So, the natural products are becoming the main source of environmentally friendly corrosion inhibitors. Furthermost their extracts comprising the required features of the traditional corrosion inhibitors such as oxygen, carbon, nitrogen, and sulfur. These elements are contributed to the adsorption process on the metal surfaces and arrangement of a protective layer, which shields the metal surface against environmental corrosion. Progress of green chemical knowledge compromises a new artificial approach for ionic liquids. These compounds are well-thought-out as new safe corrosion inhibitors which act in different corrosive conditions. Finally, applications of vapor-phase inhibitors and their role of action are recommended in the protection of iron door under study.
Various tools were used in the investigation and analysis processes of the iron window grille of sabil Ramadan. Metallographic Microscope, SEM-EDS Microscope, Carbon-Sulfur, and XRD analysis indicated that the iron window grille was manufactured from low carbon steel. X-ray diffraction of corrosion products showed that they mainly consist of Magnetite Fe3O4, Goethite α-FeO(OH), and Akaganeite β-FeO(OH). Such information regarding the iron window may assist in the conservation process of this iron window. Coatings and inhibitors are used in a wide range in this field, where Special methods are required either for protection or treatment to stop or reduce corrosion rate. Experiments were performed on coupons simulating iron window to evaluate the efficiency of polyamide by using electrochemical techniques (electrochemical impedance spectroscopy (EIS) and polarization resistance (RP)). It gave sufficient protection and good results of the electrochemical measurements. Tannic acid diluted in 5% methyl alcohol (coating) and polyamide (inhibitor) applied to protect the iron window grille.
High energy ball milling has been used like alternative route for processing of materials. In the present paper, the reduction of tungsten oxide by aluminum in order to obtain metallic tungsten was studied using a SPEX type high energy mill. A powdered mixture of WO3and metallic aluminum, weighed according to the stoichiometric proportion with an excess 10% Al, was processed with hardened steel utensils using a 1:6 powder-to-ball ratio. The processing was carried out with milling jar temperature measurement in order to detect the reaction type. The temperature evaluation indicated the self-propagating reaction occurrence by fast increase of the jar temperature after a short milling time. The tungsten oxide reduction was verified by X-Ray Diffraction (XRD) analysis and the milling products were characterized by Scanning Electron Microscopy (SEM). The results were slightly different from the literature due to the mill type and milling parameters used in the work.
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