Solanum surrattence as Potential Corrosion Inhibitor

Developping chip and ecofriendlly corrosion inhibitors can replace toxic chemicals which are currently used in industries. Plant extract of Solanum surrattence in acetone, petroleum ether, and methanol has been tasted using mass loss and thermometric measurements for corrosion of aluminium in acid solutions. The plant extract of Solanum surrattence is a good corrosion inhibitor for aluminium. The inhibition efficiency depends upon the concentration of inhibitors, it inhibits the metal of 97.60% at its maximum value. This inhibitor shows efficiency at 25°C. At higher temperature the inhibition efficiency decreases. These types of inhibitors can be used to replace the toxic chemicals which are currently used in industries. We find out cheap and ecofriendlly corrosion inhibitors which can be used by acid, petrochemical, and chemical industries. 1. Introduction Aluminium and its alloys lend themselves to many engineering applications because of their combination of lightness with strength, their thermal and electrical conductivities, heat and light reflectivity, and their hygienic and nontoxic qualities. Aluminium and its alloy are exposed to the action of acids in industries; processes in which acid plays a very important role are acid pickling, industrial acid cleaning, cleaning of oil refinery equipment, oil well acidizing, and acid descaling. The corrosion of aluminium and its alloy in acid solutions have extensively been studied [1]. Some chemicals as corrosion inhibitors are currently using in industries to prevent or to reduce the corrosion rates of metals in these acid media. Due to toxic nature and high cost of these chemicals it is necessary to develop environmentally acceptable and less expensive inhibitors. Some natural products have been evaluated as potential corrosion inhibitors for different metals [2]. We have investigated the effect of plant extract of Prosopis cineraria on corrosion of aluminium [3] and mild steel [4] in acid solution in our earlier communications. The present communication describes the influence of various concentration of the extract of Solanum surrattence on corrosion behavior of aluminium in acid media by mass loss and thermometric measurements. 1.1. Chemical Constituent The fruit extract of plant yields [5] Solamargine, β-Solamargine, Cycloartanol, Cycloartenol, and Sitosterol. Leaves and roots extract yields [6] scopoletin, esculin. Fresh berries contain [7] solasurine, 3,4-di hydroxy cinnamic acid, and caffeic acid. Flowers of this plant yields [8] apigenin, quercetin-3-o-β-D-glucopyranosyl-o-β-D-mannopyranoside