ABSTRACT This study investigated the corrosion resistance of steel reinforcement in two types of concrete mixtures – ordinary Portland (OPC) used for concrete and clay pozzolana cement (CPC) used for concrete. These two concrete types were exposed to 3% and 5% (W/V) of Sodium Chloride (NaCl) and 3% (W/V) Calcium Hypochlorite (Ca(OCl)2) that acted as corrosion media. Mechanical properties and electrochemical analysis were performed over 1, 7, 15 and 23 days. The results indicated that concr...
Investigation of the low carbon steel bends into different angles with dimension 50 mm X 20 mm and then plated in Nickel bath at 3V for 25 minutes subjected to NaCl and H2SO4 corrosive environment. This research investigated the corrosion resistance of nickel- plated and un-plated low carbon steel and in a corrosive environment of H2SO4 and NaCl solutions. Weight loss method was used for estimation the corrosion rate in the current study. Low carbon steel sample was nickel electroplated at�...
Room temperature tribocorrosion behaviour of Al-4.5%Cu/SiC particulate composite was evaluated against stainless steel ball in natural sea water. Ab-initio, the Al-4.5%Cu was reinforced with 5,10,15 and 20 % SiC reinforcements to produce the Al-4.5%Cu/SiC particulate composite by stir casting method. The tribocorrosion test was carried out with an Anton Paar Tribometer at applied loads of...
ABSTRACT Snail shells and discarded aluminium components are of low economic values, and are often considered as environmental pollutants. Finding ways of utilizing these supposed wastes is consequently a direct way of creating wealth from wastes. Snail shell particles are known for their hardness, and thus considered as good alloying agent for aluminum based composites. ...
Abstract This study focused on the factors responsible for poor performance of senior secondary school students in mathematics in Onitsha Education Zone. The study was guided by four research questions. The study is a descriptive survey design. The targeted population consisted of senior secondary school students in Onitsha Education Zone. A total of 100 respondents were purposively selected by the researchers. The data were collected through the use of structured questionnaire after it was...
ABSTRACT The main purpose of this project is to Analyze Road Traffic Accident (RTA) data in Nigeria, taking Anambra State as a Case of Study and to find out the major causes of such accident and suggest strategies for preventing or controlling them for the benefit of road users. An Analysis of Accident data recorded between the years 2004 – 2008 has yielded the following facts: over speeding and faulty tires are the causal factors of road accidents. These are but the majo...
This research investigated the corrosion behaviour of selected steels (low carbon, medium carbon and high carbon steels) in 3.5 molar sodium chloride (NaCl) solution. The selected steels were cut into smaller sizes, after which they were heat treated and immersed in the corrosive media (3.5M NaCl solution) for corrosion test investigation. The immersion test was setup for 60 days for the comparative study of the behaviour of the selected steels in the corrosive media. Metallography of the ste...
ABSTRACTAccording to a few recent studies, calcium titanate is a material that is similar to hydroxyapatite in biological properties. However, calcium titanate is not currently being used in the biomedical application as to hydroxyapatite. The objective is to prepare nano calcium titanate powder from the solution of calcium oxide, ethanol, and titanium (IV) isopropoxide via sol-gel synthesis. The fiber size, pore size and morphology were studied by phenom scanning electron microscope (SEM). T...
ABSTRACTThe effect of Heat treatment on the Mechanical Properties of a welded joint of medium carbon steel has been carried out. The materials were cut, welded, to get 27 samples needed. Thereafter, Heat Treatment was carried out on the samples. Then the specimens were grouped into two groups, group A and group B. In group A, after the heat treatment on the welded specimens, one sample was quenched in water immediately, another was oil-quenched and the third one was allowed to cool unde...
ABSTRACT Attempt was made to produce wood pellets from sawdust using locally sourced binders as an alternative binder, to wood lignin which is a natural binding agent. Wood pellets were produced by manual moulding with starch concentration of cassava and potato starch as the process variable. Results show similar behavior between pellets bonded by cassava, and potato starch, But differs slightly in the case of calorific value and smoke analysis, it shows that smouldering produce the highes...