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Corrosion is a major problem all over the world. A lot of researches on corrosion are ongoing all over the world and will continue to go on. This paper investigates the effect of corrosion on the tensile properties of AISI 1040 steel in seawater. The samples were austenised at 8300C, 9300C, and 10300C, while some were not. The austenised samples were quenched in water and tempered at 5000C. The samples were further machined into tensile test specimens and then exposed to stagnant aerated seawater. Two samples each from each austenised temperature were tested using a tensile test machine at every 15-days interval, for a duration of 90 days. Some of the fracture surfaces were examined using scanning electron microscope. The results shows a 25% decrease in tensile strength for as received sample, 20.1% decrease for samples austenised at 8300C, 20.9% decrease for samples austenised at 9300C and 22.4% decrease for samples austenised at 10300C at the end of the 90thday.

Due to the inherent environmental hazards posed to our ecological system by the problem of oil spillage in aquatic media, an analytical model of this situation was derived from first principles using cylindrical co-ordinates to predict the concentration of oil sunk in water. A computer simulation of the occurrence was done using simulated data after an explicit difference numerical formulation of the analytical model was performed. The results were found to correspond with the experimental results of Villoria et al.

Describes flowline problems inherent in the land and swamp fields. Non‐destructive testing ‐ general visual inspection and ultrasonic thickness survey based on the nominal diameter sizes, age category and location of flowlines ‐ was carried out. The readings obtained were used to calculate the percentage weight loss of pipe per metre and deduce the flowline sections that need to be replaced to avoid rupture of the steel pipe or fitting in service, using residual life estimates. The reduction of the wall thickness of the pipes/ fittings is caused by a combination of corrosion initiated by physical deformation anomalies and the presence of corrosive media along the flowline tracks (inside and outside the pipes). Offers new measures to help the company mitigate the various flowline problems.