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The potentials of Crateva adansonii extract from the plant leaf as corrosion inhibitive action on the substrate in acidic was embarked upon in this research using weight loss and linear polarisation techniques spanning four temperatures (303 – 333 K). The low carbon steel coupons were immersed in blank of the acidic media and also observed at various dosage level ranging from 0.08 – 0.8 g/L for the extract. The inhibition efficiency of the extracts and corrosion rate on mild steel was measured at room temperature for 504h and 21h at the four temperatures. The maximum inhibition efficiency was found to be 84.95% for Crateva adansonii extract in acidic medium respectively. The weight loss decreased with increase in Crateva adansonii extract due to higher degree of surface coverage. The inhibition potential increased with increase in concentration at 0.8 g/L as optimum, but decreased with rise in temperature as a result of the desorption of the extracts from the low carbon steel surface. Polarization technique indicated a reduced corrosion rate in all test solutions. The use of Crateva adansonii extract has been found to inhibit corrosion of low carbon steel in this study and hence their usage is hereby proposed in acidic medium.

POTENTIALS OF Crateva adansonii AS CORROSION INHIBITOR ON LOW CARBON STEEL IN ACIDIC MEDIUM