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Title: Investigation the Inhibition Action of Potassium Thiocynate on the Corrosion of Mild Steel in HCl and H2SO4 Mediums
Author(s): D. M. Sobhy, Y. El-Taweel, S. El-Housseiny, M. Abd El fattah
Pages: 1-14 Paper ID:180406-1903-5959-IJBAS-IJENS Published: June, 2019
Abstract: The corrosion inhibition effect of potassium thiocynate (KSCN) on mild steel in deareated 1 M hydrochloric acid and 0.5 M sulphuric acid solution at 30 o C was investigated using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The corrosion rates of steel and the inhibition efficiencies of the KSCN were calculated. The results showed that KSCN act as good inorganic inhibitor and the inhibition efficiencies were significantly increased by increasing the concentrations of KSCN. Polarization curves showed that KSCN acts as mixed type inhibitor. The impedance response indicated that the corrosion process occurs under charge transfer control. Electrochemical techniques give more accurate results other than the weight loss method.
Keywords: Corrosion, KSCN, polarization, electrochemical impedance, mild steel
Full Text (.pdf)  International Journals Of Engineering and Science | 965 KB
Title: Comparative Study of the Leaf Morphology and Anatomy of Selected Strychnos Species: Strychnos Spinosa Lam., Strychnos Innocua Del. and Strychnos Usambarensis Gilg Found in Three Ecological Zones in Nigeria
Pages: 15-22 Paper ID:170501-1903-8484-IJBAS-IJENS Published: June, 2019
Abstract: The morphological and anatomical study of three Nigerian species of Strychnos: S. spinosa, S. innocua and S. usambarensis was carried out. The leaves are dorsiventrally flattened, petiolate, with distinct palmate venation. The transverse section of leaf lamina revealed uniseriate epidermis with double-layered palisade mesophyll and loosely arranged spongy mesophyll. Rosette crystals were found in the mesophyll of S. spinosa and S. usambarensis. Stomata are hypostomatic and the measurement of the length of guard cells of S. innocua differed from those of S. spinosa and S. usambarensis. Petiole anatomy revealed seven variously sized and separate vascular bundles in S. innocua and S. spinosa but with a single arc shaped bundle in S. usambarensis.
Keywords: Strychnos spinosa, S. innocua S. usambarensis, palmate venation, rosette crystals.
Full Text (.pdf)  International Journals Of Engineering and Science | 1,833 KB