Abstract This research work investigated the corrosion resistance of nickel plated low carbon steel in tomato fluid. It simulated the effect of continuous use of the material in a tomato environment where corrosion products are left in place. Low 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 tomato fluid environment for for 30 days. The electrode potentials mV (SCE) were measured every day. Weight...
ABSTRACT The main objective of this study is to investigate the corrosion resistance characteristics of electroplated Medium Carbon Steel (MCS) in 0.5mol/dm3 Sodium Carbonate environment. Nickel plating of MCS was done in watts solution for 25 minutes with a current density of 3 A/dm3 at 60oC. The nickel plated MCS was later gold plated for 20 minutes with a current density of 0.2 A/dm3 at 50oC . The plated and unplated MCS were exposed to sodium carbonate environment for 360 hours. The weigh...
abstract Energy requirements and exergy inefficiencies for processing of malt drink were estimated for a Nigerian brewery. The process was divided into twenty-one basic unit operations and grouped into four main group operations: silo house, brew house, filter room and packaging house. The energy intensity for processing a batch of 9.8 tonnes brew grains to 562 hl of malt drink was estimated as 261.63 MJ/hl consisting of electrical (41.01%), thermal (58.81%) and manual (0.19%) of the total en...
Abstract This study investigated the corrosion resistance of plated and unplated steels useful as ornamentals in saline environment. Nickel plating of carbon steel was done in watts solution for 25minutes with a current density of 3 Adm-3 at 60o C. The nickel plated carbon steel was later gold plated for 20 minutes with a current density of 0.2 Adm-3 at 50o C . The plated and unplated carbon steels were immersed in saline environment for 360 hours. Weight loss was taken every 24 hours in orde...
INTRODUCTION Measurement of mechanical. thermal, electrical, and chemical quantities are made by devices called sensors and transducers. The sensor is responsive to changes in the quantity to be measured e..g. temperature, position, systolic bold pressure or chemical t concentration. The transducer converts such measurement into electrical signals. which usually simplified can be fed into instruments for the readout, recording or control of the measured quantities. Sensors and transducers can...
Abstract This work presents the artificial neural network(ANN) modeling for sacrificial anode cathodic protection of low carbon steel using Al-Zn-Sn alloys anodes in saline media. Corrosion experiments were used to obtain data for developing a neural network model. The Feed forward Levenberg-Marquadt training algorithm with passive time, pH, conductivity,% metallic composition used in the input layer and the corrosion potential measured against a silver/silver chloride(Ag/AgCl) reference elec...
Abstract: The maintenance profitability problem is an important but emerging . concept of maintenance performance measurement that views the maintenance function as a value adding subsection of the organisation. The service provided by the maintenance system to production is charged as a price, which results in the monetary contribution of the maintenance department to the organisation. In the same way. as production would add financial benefits to the organisation the maintenance system is p...
Abstract: Micro-alloyed steels produced by controlled rolling are of the most attractive propositions in many engineering applications because of their relative low cost, moderate strength and very good toughness when compared with as-castalloy steel.. This research work has shownthe possible substitution of cheaper, low-alloy steel for the high alloy steel for the same application. The effect of HTMT onthe mechanical properties of low alloy steel was investigated.
ABSTRACT The research work provides the basic information for the desrgn of a Central Air-Conditioning system for Kenneth Dike Library extension, U.niversity of Ibadan, Oyo Stake used as a case study. The software was designed, using a visual basic 6.0 (C++) programming language, to perform a thermal analysis for all the rooms of the floors in the building. The developed software called AIRCCAD is implemented to handb mathematical equations and engineering calculations efficiently and effecti...
ABSTRACT The dearth and cost of energy supply in Nigeria calls for planning and management through energy audit. The object of this paper is to carry out a comprehensive energy audit of the two commercial buildings commonly referred to as Energy House and Mirror House which are the head offices of the Global Fleet Oil & Gas Ltd. Company and National Mirror Newspaper respectively, using their 2011 energy consumption data. The power supplies to both offices are from the same generators which pr...
Abstract: Taylor and Davis total productivity model has significant advantage over the traditional and more commonly used productivity models - its holistic nature. The model incorporates elements of net sales, inventory changes, wagcs and salary, investor's contribution, working and fixed capital. This paper presents a unique approach in the determination of the total factor productivity for a manufacturing organisation. This study is motivated by the dearth of models comprehensive enough t...
The inhibitive strength of Canonamuricata (CM) and Cassuttidfilifurmis (CF) on mild steel dissolution in 0.5 M H2SO4 and 1 M HCl environment was studied using gravimetric and electrochemical techniques. The results obtained indicate that all studied extracts of both plants are adsorption type inhibitors hence; the adsorption of the inhibitors is in line with Langmuir adsorption isotherm. Efficiencies of the inhibitors increased with an increase in concentration of the extract but decreas...
Abstract This paper presents the characterization of laterite-cement-based matrix composites, reinforced with chemically modified bamboo fibers. Fiber extraction and chemical modification were first explored by soaking slabs of bamboos in NaOH solution (5 wt.% of NaOH in distilled water) for 14 days. Fiber characterization, as well as the flexural and compressive strength of reinforced composites, were carried out with MTS universal mechanical testing machine. Comparative results on the compr...
AbstractThe main purpose of the project is to convert polyethylenetetraphylate (PET), a known plastic waste material in Ghana, to wealth. Composite samples were produced by heating aggregates together with shredded PET plastic waste material, while bitumen was added to the plasticcoated aggregates. The composites produced were of 4.5 wt%, 9.0 wt%, 13.6 wt% and 18.0 wt% concentrations of PET. Mechanical and optical characterisation of the fabricated composite samples were studied for optimizat...
Abstract Diabetes mellitus, also known as diabetes has on major effect on its patients. This is the effect of impaired wound healing. Patients thus get minor wounds such as small cuts which become non-healing and are liable to get infected. Severe cases of such occasions lead to amputations. A solution to this problem is tissue regeneration with the help of scaffolds. These scaffolds are made of biopolymers and promote cell adhesion, regeneration and minimal diffusional constraints. Computer ...