Effects of Extracts of Alchornea Cordifolia on Biocorrosion Control on Sewer Concrete

Concrete infrastructures that make up the sewer system exposed to waste waters are often subjected microbial corrosion. The biogenic sulfuric acid produced by activity of sulfur-oxidizing bacteria A.thiooxidans attacks concrete in sewers leading loss mass and deterioration.The aim this study was control biodegradation using plant extracts Alchornea Cordifolia. samples were corroded for 26 months real wastewater conditions. influence on biocorrosion determined terms weight loss, pH, sulfate concentration variation, chemical composition changes, formation corrosion by-products. Recorded rates before coating between 0.071996mpy –1.168546mpy. Changes sample morphology, ettringite gypsum formed observed X-ray diffraction SEM methods with progression.Phytochemicals analysis confirmed presence tannins, saponins, flavonoids, terpenoids tissues. GC-MS ethanolic identified compounds.The most dominant being Eugenol.Biocorrosion effects waters. A marked decline each extract's recorded coated concretes (0.002589mpy-0.003256mpy). An increase inhibition efficiency an extract range of50% A.Cordifolia gave highest inhibitor efficiency. diffractive scanning electron microscopy showed morphological variations after coating. Results ANOVA as having significant effect extracts'