Abstract

In this research the Vernonia amygdalina (VA) solution was prepared and utilized in slowing down the corrosion of Subsea Transmission Pipelines (STP) in harsh offshore environment. The specimens were kept in a workable state to prevent them from any preferential attack. These specimens were rinsed in distilled water, dried and weighed to obtain the initial weight. 6 Aluminum (Al) and 6 Mild steel (MS) are used as samples and immersed into different containers of seawater and 0% of VA solution as our control experiment. The others were immersed in a 5, 10, 15 and 20% of the VA solution. At various time interval values are obtained and graphs plotted on weight loss and corrosion rate versus time. After about 200 hours it was observed that at different time and percentage of the VA solution have different effects on the specimen. It was also noticed that the VA solution was gradually losing its effectiveness. In view of this, VA has proven as a viable solution for corrosion prevention on STP, if more inhibitors are added regularly to sustain the effectiveness of the anti-corrosive solution.