Browsing by Author "Olorunfemi, O."

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Corrosion behavior of nickel plated medium carbon steel in cocoa liquor
    (Pacific Journal of Science and Technology, 2009-11) Oluwole, O. O.; Olorunfemi, O.
    This research work investigated the corrosion resistance of nickel plated medium carbon steel in cocoa liquor. It simulated the effect of continuous use of the material in a cocoa liquor environment where corrosion products are left in place. Medium carbon steel samples were nickel electroplated at 4V for 20, 25, 30, and 35 mins. using Watts solution. The plated samples were then subjected to a cocoa liquor environment for 30 days. The electrode potentials mV (SCE) were measured every day. Weight loss was determined at intervals of 5 days for the duration of the exposure period. The result showed maximum corrosion rate on the nickel-plated steels to be 0.05mm/yr throughout the 30 days. duration of the test while corrosion rate in the un-plated steel was observed to be 0.36mm/yr at the end of 30 days. Generally, it was observed that the thicker the nickel coating, the lower the corrosion rate. The pH of the cocoa liquor was acidic throughout the thirty days test duration. Nickel plating is suitable as a protective coating for mediumcarbon steels in cocoa liquor environment.
  • Thumbnail Image
    Item
    Investigation of pulping potentials of jatropha curcas
    (2013-10) Ogunjobi, K. M.; Adetogun, A. C.; Soetan, D. O.; Omole, A. O.; Olorunfemi, O.; Odebiyi, J. B.
    The study investigated the pulping potentials of Jathropha curcas, Samples of sawdust, shaving and splinters were taken at three sampling heights (20%, 50% and 90%) and macerated using glacial acetic acid (CH3COOH) and hydrogen peroxide (H2O2) in ratio 1:1. Result of fibre characteristics showed that mean fibre length ranged from 0.216mm at top 0.243mm at middle and 0.244mm at the base. Mean fibre diameter of sawdust (0.01053mm) was highest followed by 0.01028mm for splint and shaving had 0.01002mm. Highest lumen width was recorded at top. Both sampling height and within sample exhibited. Runkel ratio of less than 1 while Flexibility coefficient compared favourably with other species. This study showed that Jatropha stem can be used as an alternative in pulp and paper industry taking advantage of its appreciable short fibre length and Runkel ratio of less than 1.