Research On Properties Of The Shield Coating Used On Large Oil Storage Facilities

In order to prevent the fire and explosion hazard caused by electrostatic charge effectively, applying shield coating is very important on the petroleum storage facilities. Conducting electrostatic coating, a new kind of functional coating, has been rapidly developed in the past two decades. It is mainly used in the petroleum storage facilities and can prevent the fire hazard and explosion caused by electrostatic charge. The fabrication of shield coating used on large storage facilities in this paper is mainly applied to the petroleum storage tanks. In the preparation of conducting electrostatic coating, E20 and E44 exposy are used as film forming material and carbon nano tubes is mixed into as conducting functional component. This new coating can better resolve the commonly existed problems of the original conducting electrical coating such as less endurance performance of conducting electrostatic, shortage of resistance to water, colour- blackened, being inconvenient to constructions and less matching the performance needs of antistatic charge and oil resistance and anticorrosion.Firstly, this paper dealt with the preparations of conducting electrostatic coating, which was used on large petroleum storage tanks, by using the modified epoxy and polyamide resin as the film forming resin and the carbon nano tubes and mica as conducting carrier, through an analysis of its composition and its mechanism of action. A comprehensive research was conducting on the relations among its solidified behavior, vitrification point, adhesive power, impact strength and peel strength. The best solidification conditions of conducting electrostatic coating was established..Secondly, the surface-treating method of the carbon nano tubes was investigated, which was first time to process the surface of carbon nano tubes using the techniques such as purification, alkaline treatment, modification of coupling agent and ultrasonic dispersion. The results exhibit that this method not only guarantees the uniform dispersion of carbon nano tubes in coating but also increases polarized molecular group on the surface of carbon nano tubes. It is helpful to roundly improve the performance of coating. The effects of dosage of...