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Synthesizes And Performance Of Poly (Ethylene Glycol Terphthalate Dimethyl Siloxane) Compound As Protective Material For Carbon Steel Alloy Of Petroleum Pipelines

O.M.Abo-Elenien

The poly (ethylene glycol terphthalate dimthylsiloxane) compound [PEGTDMSO] was prepared and confirmed by FTIR, NMR and GPC techniques. The carbon steel alloy specimens were provided from unused petroleum pipelines. The surfaces of specimens were prepared by polishing with different grade emery paper. PEGTDMSO was formulated with TiO2, ZnO2 and different ratios of silica gel as inorganic additives to produce seven formula designated from Y0- Y6. The toluene diisocyanate (TDI) was used as curing agent. The visual inspection, physical, mechanical and chemical properties such as, wet film thickness (WFT), dry film thickness (DFT), adhesion forces, bending, impact, hardness and thermal stability at 150 - 400 ºC at intervals of 50 ºC. Acid effect (10% H2SO4) at period time of 480 hr and the sealant water effect at period time of 1440 hr for the formed dry films were studied. The surfaces of films were visualy inspected by magnification power after chemical tests. The results indicated that the corrosion spots did not detect on the surface of the formed dry films from formula Y2-Y6. These films approved to be a protections agent for the surface of petroleum pipelines against corrosion.