Browsing by Author "Syed, A. U."
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Item Open Access A dimensional metrology-based approach for corrosion measurement of ship grade steels exposed to various marine environmental conditions(Taylor and Francis/Maney, 2021-04-04) Abbas, Muntazir; Simms, Nigel; Laoa, Liyun; Malik, Owais A.; Syed, A. U.; Sarfraz, Syed Ali; Ashraf, Luqman; Rizvibar, Syed Haider M.Corrosion-induced degradation in marine steel structures is highly dependent on the surrounding environmental conditions and sea water compositions that varies significantly around global sea water bodies. This research investigates the corrosion behaviour of ship-grade steels exposed under different sea water compositions and environmental conditions typical of the Arabian Sea. More, environmental conditions spanning those anticipated for the shipping structures operating in the highly saline and warmest regions in the Arabian Sea have been simulated in laboratory-based experiments by using heated and aerated artificial sea water. Following their exposures, the corrosion performance of coupons has been investigated using the standard weight loss and a new dimensional metrology-based approach. Besides, the corrosion products formed on the steel surfaces have been characterised using various analytical techniques. Considerably higher corrosion losses and maximum corrosion depths were observed in the nutrient-rich polluted sea waters than those recorded in the natural sea waters, as well as in the simulated artificial sea water conditions.Item Open Access Fireside corrosion degradation of ferritic alloys at 600°C in oxy-fired conditions(Elsevier, 2013-11-19) Dudziak, T.; Hussain, T.; Simms, Nigel J.; Syed, A. U.; Oakey, J. E.This paper reports the results of a study carried out to investigate the effects of simulated coal/biomass combustion conditions on the fireside corrosion. The 1000 h deposit recoat exposure (5 × 200 h cycles) was carried out at 600 °C. In these tests ferritic alloys were used 15Mo3, T22, T23 and T91. Kinetics data were generated for the alloys exposed using both traditional weight change methods and metal loss measurements. The highest rate of corrosion based on EDX results occurred under D1 deposit where provoke mainly by the formation of alkali iron tri-sulphate phase.