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• W2790131245 abstract "In petroleum and petrochemical industries, offshore and onshore systems have tofunction in an aggressive environment that exposes the production equipmentcomponents to thermal cycling, wear and corrosion. Although maintenance of materialdegradation in oil and gas is costly, internal and external parts of the equipment andpipelines must be well inspected and continually maintained. For this reason highlyadvanced corrosion and wear-monitoring systems must be installed in the critical areasof the plant to protect pipes and equipment from seawater and crude oil. Therefore,researchers are in search of advanced material and methods that could be applied in oiland gas pipelines and accessories for increasing their working time.The common manufacturing processing method for improving the surface of piping andaccessories is overlay welding or cladding. This method has some limitations, such asits limitation for choosing materials. In addition, the high temperature of welding causesthe final surface has some defects such as, thermal residual stress, cracking anddistortion in the substrate. The method is also time-consuming and costly. However, thecoating method provides a blend of unique properties with low cost. Thermal spraymethods are cold spraying techniques that have a considerably less thermal stress,residual stress and other defects. Among different thermal spray coating techniques,high velocity oxygen fuel (HVOF) and plasma is the most commonly thermal sprayingcoating process to produce anti-wear and corrosion coatings with different types ofmaterials such as metal, alloys, ceramic composite, etc. Furthermore, HVOF andplasma thermally sprayed coating process induces microstructure heterogeneities,which increase the corrosion and wear resistance. In this research, five differentchemical compositions such as alloys and ceramic composite were chosen forincreasing corrosion and wear resistivity of carbon steel piping. The chemical compositions are Inconel 625, NiCrCoAlY, Al8Si20BN, Cr3C2-25NiCr and Al2O3-13%TiO2.For investigating properties of these chemical compositions, potentiodynamicpolarization testing, open circuit polarization and electrochemical impedancespectroscopy (EIS) were used in 3.5% NaCl solution (seawater) at 30°C for 30 days.Corrosion was also measured by suspending the samples inside the crude oil at 60°C for30 days. Measuring corrosion potential and corrosion current density from polarizationcurves and Tefal slope respectively established the general corrosion ranking ofdifferent materials. In addition, the correlation between individual microstructurefeatures and their electrochemical response was established by EIS including equivalentcircuit modeling.A wear property of each group of materials was investigated by pin-on-disk machineover a 9048.96 m sliding distance under different loads. The wear rate and weight lossresults of each group materials had a different behavior. Some samples were moredurable during applying different loads and the rate of weight loss in these samples wasvery limited.Comparing all the corrosion and wearing results illustrate that the ceramic compositesamples have the highest to resistance corrosion and wear behavior. Significantly lesseffective than the ceramic composite samples, the alloy coated samples showedconsiderable anti-corrosion and wear behavior." @default.
• W2790131245 created "2018-03-29" @default.
• W2790131245 creator A5024008977 @default.
• W2790131245 date "2015-11-30" @default.
• W2790131245 modified "2023-09-26" @default.
• W2790131245 title "Improving corrosion and wear resistance of carbon steel piping system in oil and gas application through thermal spray coating techniques / Mitra Akhtari Zavareh" @default.
• W2790131245 hasPublicationYear "2015" @default.
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