THE INHIBITION EFFICIENCY OF LASIENTHERA AFRICANUM AS A NATURAL CORROSION INHIBITOR
Corrosion is a serious problem in this modern age of technological advancement. This accounts for a lot of economic losses and irreversible structural damage. The cost of corrosion failures annually for any nation is difficult to estimate per annum, but it has been stated that the wastage of material resources by corrosion ranks third after war and disease (Olugbenga et al.2011). Efforts have been made to restrain the destructive effects of corrosion using several preventive measures (Loto et al. 1989, Popoola et al.2011 and Davis et al. 2001). The effects of corrosion in our daily lives can be direct by affecting the useful service lives of our possessions, and indirect, in that producers and suppliers of goods and services incur corrosion costs, which they pass on to consumers. At home, corrosion is readily recognized on automobile body panels, charcoal grills, outdoor furniture, and metal tools (Denny et al. 1996). The corrosion of steel reinforcing bars in concrete usually proceeds out of sight and suddenly results in failure of a section of bridges or buildings. Virtually all metals will corrode to some extent; the fossil–fuel boilers and fossil-fuel fired power generators equipment experience corrosion problems in such component as steam generator and water walls surrounding the furnace (Natarajanf & Sivan, 2003). Perhaps most dangerous of all is corrosion that occurs in major industrial plants, such as electrical power plants or chemical However, the consequences of corrosion are economic and could lead to:
• Replacement of corroded equipment.
• Over design to allow for corrosion.
• Preventive maintenance, for example, painting.
• Shutdown of equipment due to corrosion failure.
• Contamination of a product.
• Loss of efficiency—such as when over design and corrosion products decrease the heat transfer rate in heat exchangers.
• Loss of valuable product, for example, from a container that has corroded through.
• Inability to use otherwise desirable materials.
• Damage of equipment adjacent to that in which corrosion failure occurs.