Abstract
BackgroundIronworks in the tomb of Suleiman Pasha Al-Faransawi (located in the old Cairo, Egypt) were exposed in the open-air are susceptible to various corrosion factors, which be contingent on the environmental conditions wherein the artifacts are displayed and the existence of a protective layer or not. Examinations and analysis were conducted to identify the structure and type of the alloys used in making the decorative ironworks, to identify the manufacturing technique and decoration, and to study the nature of rust compounds. This has been achieved by using metallographic microscopy, X-ray diffraction, and a carbon–sulfur analyzer. Many protection approaches have been worked such as varnishes, waxes, and oils, but they have had many disadvantages. The aim of this paper is to assess the competence of polyurethane coating by using electrochemical measurements (electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization) in the fortification of ironworks exposed in the outdoor environment.ResultsThe results confirmed that the decorative ironworks were manufactured from wrought and gray cast iron. The main corrosion products identified by XRD are goethite, akageneite, and maghemite. Lead oxide hydrate refers to old lead paints (red primer) which have been applied to protect the ironworks. Quartz and calcite are the products of heavy dust particles that covered the surface.ConclusionThe data proved that the polyurethane is acting as a good protective coating for the decorative ironworks exposed in an uncontrolled environment. The 2% is considered as the recommended dose for this polymer for the minimum corrosion rate of the ironworks.
Highlights
IntroductionIronworks in the tomb of Suleiman Pasha Al-Faransawi (located in the old Cairo, Egypt) were exposed in the open-air are susceptible to various corrosion factors, which be contingent on the environmental conditions wherein the artifacts are displayed and the existence of a protective layer or not
Ironworks in the tomb of Suleiman Pasha Al-Faransawi were exposed in the open-air are susceptible to various corrosion factors, which be contingent on the environmental conditions wherein the artifacts are displayed and the existence of a protective layer or not
The corrosion outcomes that formed on the decorative ironworks are categorized in Fig. 8 and Table 2
Summary
Ironworks in the tomb of Suleiman Pasha Al-Faransawi (located in the old Cairo, Egypt) were exposed in the open-air are susceptible to various corrosion factors, which be contingent on the environmental conditions wherein the artifacts are displayed and the existence of a protective layer or not. Cast iron was brought together without the applying of any welding at all, frequently by earnings of lugs, grooves, pins, and bolts These joining performances are fragments of the character of cast ironwork. A small group of pigments-red lead, iron oxide, tar, and graphite-continually reappear in discussions of metal primers in the nineteenth century (Hawkes 1979) Within the former, additional varnishes were used for protecting iron, such as linseed oil (further shared use on sealed ironworks) and galvanizing (smearing a zinc layer). The tomb of Suleiman Pasha Al-Faransawi is in Cairo’s old Cairo quarter, Mohammed Fouad Galal street, Egypt It is a small cast-iron tomb in a residential square, it is lonely of Cairo’s utmost unusual monuments, built in the nineteenth century (1860 AD) in honor of an extremely unusual man. Overall the years, ongoing work has been performed into appropriate materials for coating applications
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