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IJSTR Volume 6 - Issue 8, August 2017 Edition - ISSN 2277-8616

Publication for Volume 6 - Issue 8, August 2017 Edition is in-process. The publication process will complete on August 15, 2017, the full text will be available after the completion of publication process.
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Corrosion Characterization Of ZA-27 / Red Mud Metal Matrix Composites In Sodium Chloride Solutions

Dr Chandrasekhar N

The present investigation aims to evaluate the corrosion characteristics of red mud metal in sodium chloride solution. Metal matrix composites [MMC] are heterogeneous systems containing matrix and reinforcement. Matrix may be alloy or metal or polymer. Reinforcement may be particulate or fiber or whisker. Their physical and mechanical properties can be tailored according to requirement. They are used in automobile, aircraft and marine industries because of their increased corrosion resistance. In this study weight loss corrosion tests and Potestiodynamic polarization studies by using potestiostat are conducted on ZA-27/ Red Mud metal matrix composites in different concentrated sodium chloride solutions. Both matrix and reinforcements are commercially available. Composites are prepared by liquid melt metallurgy technique using vortex method. Composites containing 2, 4 and 6 percent of preheated but uncoated red mud are prepared. Cylindrical specimens and rectangular specimens are machined. Studies are carried out in 0.035%, 0.352% and 3.5% solutions of sodium chloride. In all the tests the composites were less prone to corrosion than the matrix. Hence the composites can be used in the marine environment.


Assessment Of Groundwater Quality Of Biu And Environs North Eastern Nigeria

Nggada Ibrahim sikami, Nur Ahmed

Geo-electrical data were adopted and utilized in determining the hydraulic conductivity and transmissivity of the study area. Hydraulic conductivity and transmissivity varied from 3 to 34m/day and 33 to 919m2/day respectively. Correlation coefficient between transmissivity and hydraulic conductivity give positive correlation which signifies a perfect correlation. In order to determine the groundwater quality of Biu, groundwater samples were collected from fourteen boreholes and ten hand dug well within the study area. The water sample were analyzed for physiochemical and bacteriological properties to assess its suitability for drinking, and irrigation purposes. Some areas have elevated concentration of conductivity, TDS, manganese, lead, magnesium and microbial which are consider unsafe for drinking based on World Health Organization guidelines concentration for drinking water. Only 29% of borehole and 10% of hand dug well are free from contamination. Sodium adsorption ratio and percentage sodium have been studied to evaluate the suitability of the groundwater for irrigation purpose. Groundwater within the study area is safe for irrigation with respect to its sodium adsorption ration and Sodium percent. Sample BH6 has high value of sodium adsorption ratio which is unsuitable for irrigation.



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ISSN 2277-8616
IJSTR - July 2017 - Volume 6 Issue 7