SILPAKORN UNIVERSITY SCIENCE AND TECHNOLOGY JOURNAL, Vol 10, No 2 (2016)

Determination of Thermo Physical Properties of Water-Extract from Fermented Ground Maize (WEFGM) as Possible Alternative to Water Use as Cutting Fluid

Taofeek Ayotunde Yusuf, Bukola Olalekan Bolaji, Salami Olasunkanmi Ismaila, Johnson Kayode Adewumi










Abstract


Water has so far been regarded as the best cutting fluid but its corrosion-influence on the work piece has necessitated
searching for an alternative. Meanwhile, water-extract from fermented ground maize (WEFGM) processed from two
(western yellow and kewesoke white) maize varieties have been considered having been previously found to contain
corrosion inhibitors. Its density, viscosity and specific heat capacity (SHC) were determined and compared with that
of water. The results showed that white and yellow WEFGM give densities with percentage decrease of 0.1 and 1.0%
relative to water respectively. Using Stokes’s law, the ratios of the viscosities for white WEFGM, yellow WEFGM
and water were 1.22: 1.17: 1.00 and 1.20: 1.26: 1.00 respectively for the smallest (diameter of 0.45 cm) and biggest
(diameter of 1.4 cm) spheres. T-test shows that there is no significant difference in the densities and viscosities values
of all the samples (P

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