Study on Corrosion Inhibition Efficiency of Solanum Erianthum Extract on 6063 Aluminium Alloy in Different Sea Water
MetadataShow full item record
Metallic components used for construction of offshore facilities usually suffer corrosion attack by the harsh sea water environment. The use of inhibitor is one of the techniques used in minimizing this electrochemical damage in metals and alloys. The environmental toxicity of most of the available corrosion inhibitors has prompted the search for green corrosion inhibitors which are biodegradable, do not contain heavy metals or other toxic compounds and are environmentally friendly. In this work, Solanum Erianthum was extracted from the plant leave and used as green corrosion inhibitor for AA6063 aluminum alloy in deep seawater, shallow seawater and lagoon water environment using potentiodynamic corrosion test method. The results obtained showed that the extract contains 40.52 % of hexadecanoic acid, 26.37 % of E-9 octadecenoic acid, 5.74 % Carissonic dimethyl ester and other organic substances. The extract has inhibition efficiencies of 95.6 %, 96.1 % and 96.6 % on AA6063 aluminum alloy in deep seawater, shallow seawater and lagoon water respectively. The results also showed that the deep seawater contains the highest chloride content of 15083.98Mg/L, that of shallow seawater is 567.20Mg/L while lagoon water has the least chloride content of 531.75Mg/L. Hence the corrosion rates of the alloy in these waters as obtained in this work follow the above trend of chloride content.