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Articles by C.A. Loto
Total Records ( 2 ) for C.A. Loto
  J.O. Okeniyi , O.A. Omotosho , O.O. Ajayi , O.O. James and C.A. Loto
  The performances of sodium nitrite and aniline inhibitors on the corrosion of concrete steel rebar partially immersed in sodium chloride and sulphuric acid media were investigated in this study. The open circuit potential corrosion monitoring technique was employed for the marine and acidic simulating environments and potential readings were taken in accordance with ASTM C 876. Inhibiting quality and uniformity of the inhibitors were then analyzed using the Weibull probability density distribution as an extreme value statistical modelling approach to study performance effectiveness and predict the most efficient inhibitor in each media. In the statistically analyzed experimental results for each of the inhibitor concentrations employed, (0.679 M) sodium nitrite is identified as exhibiting the best inhibiting quality in sodium chloride while (0.137 M) aniline was predicted as showing the lowest probability of corrosion risk in sulphuric acid medium. The synergetic admixtures employed in the study performed poorly in inhibiting effectiveness compared to the control specimens in the two media considered. The overall probabilistic results predicted preferences of sodium nitrite as inhibitors in the sodium chloride medium simulating saline environments and aniline in sulphuric acidic medium simulating sewage or underground microbial environments.
  C.A. Loto
  The need to prevent corrosion, toxicity and to enhance the aesthetic value of steel components in automotive, construction, electrical, appliances, recreational and materials handling industries and in our daily lives, has led to an enlarged interest in the field of electrodeposition of zinc on steel substrates. The toxicity and stringent regulation against water pollution and hence costly effluent disposal of cyanide based baths has led to the increased interest and accelerated growth of acid zinc based baths in the past few years. This study reviews the recent progress and development, bath solution and composition, effect and type of addition agents and practical aspects of acid based solutions. The corrosion resistance of the electrodeposited zinc coatings is also examined. The effectiveness of the cassava and sugar cane juices separately and the synergistic effect of the two juices combined is experimentally reported.
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