标题：Effect of crude methanolic extract of Lawsonia inermis for anti-biofilm on mild steel 1010 and its effect on corrosion in a re-circulating wastewater system
摘要：AbstractThe natural productCatharanthus roseusandLawsonia inermisleaf extract enhancement in the anti-corrosion potential green corrosion inhibitor (GIC) forBacillus oleroniusEN9 biofilm forms on mild steel (MS) in re-circulating water environment is demonstrated. This re-circulating water was enhancing the corrosion due to the temperature, pH, salinity, and chloride. Therefore, we need to improve the performance of the inhibitors. The chosen GIC inhibition was examined by antibacterial assay, weight loss, surface, and electrochemical analysis.L. inermishas shown the antibacterial activity (75%) against the corrosive bacteriaBacillus oleroniusthan theC. roseus(44%) optimum concentration of 20 ppm.L. inermiswas selected for further studies and it reduces the corrosion rate up to 75 % in the 1% NaCl system. Scanning electron microscopy confirms the formation of the protective film on MS and GC–MS confirmed the presence of complex molecules ofL. inermis.Therefore, the current work concluded that green corrosion inhibitor is suitable for the inhibition of biocorrosion of MS in the re-circulating system and a promising alternative for chemical inhibitor.
