Dissolved Oxygen in Gasoline and Tank Corrosion

The quantity of gaseous oxygen dissolved in water is generally known as Dissolved Oxygen. However, the oxygen may dissolve in other liquids too. To determine the concentration of Dissolved Oxygen in Gasoline a probe was used to estimate oxygen concentration at different experimental conditions. Comparing the experiments performed on Gasoline and Deionized Water it was found that for gasoline, the equilibrium point was reached earlier, while for the Deionized Water it took a long time for the initial reading to be attained after purging. In determining the mass transfer coefficients of Gasoline and Deionized Water it was found that Gasoline displayed a higher mass transfer coefficient value than Deionized Water. It is concluded that the increase in stirring speed, increases, the mass transfer coefficient and it is more prominent for gasoline. The aim of this work was to find the ability of the gasoline to dissolve oxygen. From the research it was reckoned that the Dissolved Oxygen and free water present in the tanked Gasoline, could result in electrochemical corrosion over a period of time.

水体中溶解的气态氧的总量通常被称为溶解氧（Dissolved Oxygen）。不过，氧也可溶解于其他液体之中。为测定汽油中的溶解氧浓度，本研究采用探针在不同实验条件下对氧浓度进行估算。通过对比汽油与去离子水（Deionized Water）的实验结果，研究发现汽油组更早达到平衡点，而去离子水组在吹扫后需要更长时间才能获得初始读数。在测定汽油与去离子水的传质系数时，研究发现汽油的传质系数数值高于去离子水。研究得出结论：搅拌转速的提升会提高传质系数，且该效应在汽油体系中更为显著。本研究的目的在于探究汽油溶解氧的能力。本研究还认为，罐装汽油中存在的溶解氧与游离水，会在一段时间后引发电化学腐蚀。