-
Evaluation of Solid Minerals Inhibitory Potentials on Mildsteel Corrosion
Sodiya Ezekiel Folorunso,
Aladesuyi Olanrewaju,
Egbure Florence Ebudola,
Olagbende Odundayo Sunday
Issue:
Volume 6, Issue 3, May 2017
Pages:
112-118
Received:
3 November 2016
Accepted:
2 December 2016
Published:
14 March 2017
Abstract: The use of some solid minerals in the inhibition of mild steel corrosion in acidic media was investigated using the conventional weight loss and hydrogen gas evolution method. Those considered are Talc, Gypsum, Alumina, Iron chromite and Haematite. Scanning electron microscope (SEM) and Electron Dispersive X-ray spectroscopy (EDX) studies revealed the protective effectiveness of the adsorbed film of the mineral extracts on the steel surface. Results obtained indicated the minerals inhibited corrosion of the steel in the order Talc > Gypsum > Haematite > Alumina > Chromite > feldspar as the order of Inhibition efficiency. The resultant effect of solid minerals with Sida acuta plant extract is inhibitorily antagonistic due to induced corrosion rather than improve on the inhibition efficiency. Elements in the minerals got adsorped and reacted with the iron in steel to form a compound of effective protection of the metal against corrosion in its environment.
Abstract: The use of some solid minerals in the inhibition of mild steel corrosion in acidic media was investigated using the conventional weight loss and hydrogen gas evolution method. Those considered are Talc, Gypsum, Alumina, Iron chromite and Haematite. Scanning electron microscope (SEM) and Electron Dispersive X-ray spectroscopy (EDX) studies revealed ...
Show More
-
Application of V2O5-ZnO Nanocomposite for Humidity Sensing Studies
Narendra Kumar Pandey,
Abhishek Panwar,
Suneet Kumar Misra
Issue:
Volume 6, Issue 3, May 2017
Pages:
119-125
Received:
15 March 2017
Accepted:
29 March 2017
Published:
14 April 2017
Abstract: Paper reports humidity sensing studies of V2O5-ZnO nanomaterial. When sample of V2O5-ZnO annealed at 500°C was exposed to increasing humidity, resistance decreased. Aging over six months was within ±6% for ZnO and ±2% for V2O5-ZnO; hysteresis was within ±6% for both ZnO and V2O5-ZnO sensing elements. Grain size for pure ZnO was 620 nm, and 400 nm for V2O5-ZnO nanomaterial. XRD suggested a distribution of crystallite size. For ZnO- V2O5, distribution in the crystallites size was as wide as 130% compared to only 20% for ZnO. Sensitivity of ZnO- V2O5 nanomaterial was 500% more compared to ZnO sample.
Abstract: Paper reports humidity sensing studies of V2O5-ZnO nanomaterial. When sample of V2O5-ZnO annealed at 500°C was exposed to increasing humidity, resistance decreased. Aging over six months was within ±6% for ZnO and ±2% for V2O5-ZnO; hysteresis was within ±6% for both ZnO and V2O5-ZnO sensing elements. Grain size for pure ZnO was 620 nm, and 400 nm f...
Show More
-
Potability of Groundwater in Itu Local Government Area, South-South of Nigeria
Godwin Asukwo Ebong,
Helen Solomon Etuk
Issue:
Volume 6, Issue 3, May 2017
Pages:
126-135
Received:
16 March 2017
Accepted:
11 April 2017
Published:
2 May 2017
Abstract: Water samples were obtained from eight (8) different boreholes in Itu local government area, South-South of Nigeria. These samples were treated and analyzed using standard methods for their pH, temperature, turbidity, electrical conductivity (EC), total hardness (TH), dissolved oxygen (DO), biochemical oxygen demand (BOD), iron (Fe), zinc (Zn), copper (Cu), lead (Pb), cadmium (Cd) and nickel (Ni) levels. Mean levels of all the parameters determined in studied groundwater were within their safe limits except lead and cadmium. This study revealed that concentrations of Pb and Cd rendered water from the studied boreholes unsafe for human consumption considering the toxic nature of these metals. Variable correlations were observed among the studied physicochemical properties of water. Pollution index analysis also confirmed the hazardous nature of lead and cadmium in groundwater from studied boreholes. Proper treatment of studied boreholes to eliminate these toxic metals has been recommended as prolong consumption of this untreated water may eventually result in health problems associated with pb and Cd toxicities.
Abstract: Water samples were obtained from eight (8) different boreholes in Itu local government area, South-South of Nigeria. These samples were treated and analyzed using standard methods for their pH, temperature, turbidity, electrical conductivity (EC), total hardness (TH), dissolved oxygen (DO), biochemical oxygen demand (BOD), iron (Fe), zinc (Zn), cop...
Show More
-
Study on the Corrosion Behavior of Aqueous Extract of Thermal Insulation Materials to A3 Steel
Jiang Lin-lin,
Li ling-jie,
Zhang Hong-lei,
Wang Zhi-tao,
Zhang Yan-jun
Issue:
Volume 6, Issue 3, May 2017
Pages:
136-141
Received:
4 May 2017
Published:
4 May 2017
Abstract: The pH, conductivity and ions contents of aqueous extract of thermal insulation materials and deionized water were tested. Their corrosion behavior to A3 steel was investigated by static weight loss method. The results showed that the corrosion rate of glass wool was the lowest and performed local corrosion. The danger was the largest. Silica aerogel insulation blankets performed homogeneous corrosion and the corrosion rate was lower than that of deionized water. Aqueous extract of polyurethane foams expanded with HCFC-141b and CO2 were homogeneous corrosion. The corrosion rate of the former was slightly lower than that of the latter，but both were larger than deionized water.
Abstract: The pH, conductivity and ions contents of aqueous extract of thermal insulation materials and deionized water were tested. Their corrosion behavior to A3 steel was investigated by static weight loss method. The results showed that the corrosion rate of glass wool was the lowest and performed local corrosion. The danger was the largest. Silica aerog...
Show More
-
Geodynamic Significance of Stacking Lower Cambrian Sequences Units in the Western Anti-Atlas
Mohammed Benssaou,
Lhassan M’barki,
Abdelkrim Ezaidi,
Mohamed Abioui
Issue:
Volume 6, Issue 3, May 2017
Pages:
142-147
Received:
18 January 2017
Accepted:
8 March 2017
Published:
8 May 2017
Abstract: In the Anti-Atlas the lower Cambrian succession was traditionally considered as a post-rift series. Recently the Western Anti-Atlas appears to be affected by an early Cambrian rifting process. In the Igherm area (Western Anti-Atlas), this succession is represented by an alternating carbonate and siliciclastic facies reflecting several sedimentary environments. The vertical stacking of these facies define four Composite-Sequences constituted, each one, by two or more transgressive-regressive sedimentary cycles. The differential and progressive extensional tectonic events seem to be the main control on the genesis and on the vertical stacking transgressive-regressive sedimentary cycles. The accommodation space is generated by a strong tilting related to syn-rift tectonics. The lack of lowstand system tracts and other erosive features, suggests the occurrence of platform drowning just below the falling sea level stage. So stratigraphic stacking of the Lower-Cambrian strata exposed in the Igherm area, constitutes the response to the rifting process in the Anti-Atlas and consequently a probably fragmentation indicator of a neoproterozoic Gondwana.
Abstract: In the Anti-Atlas the lower Cambrian succession was traditionally considered as a post-rift series. Recently the Western Anti-Atlas appears to be affected by an early Cambrian rifting process. In the Igherm area (Western Anti-Atlas), this succession is represented by an alternating carbonate and siliciclastic facies reflecting several sedimentary e...
Show More
-
Studies on Activation of High-Mobility III-V Group Semiconductor Materials by Using Microwave Annealing
Tzu-Lang Shih,
Wen-Hsi Lee
Issue:
Volume 6, Issue 3, May 2017
Pages:
148-153
Received:
10 May 2017
Published:
10 May 2017
Abstract: As semiconductors devices scale down, silicon transistors would reach its limitation below 10 nm. Researching for the novel materials, which could replace silicon, is important. In this study, the new potential materials III-V Group compound semiconductors which are ion implanted with low energy and low dose. In order to keep the ultra-shallow junction and get the best activation, the new annealing technology ─ microwave annealing (MWA) is employed. Microwave annealing is a processing with low energy and longer period. In contrast to the conventional high thermal annealing methods such as rapid thermal annealing (RTA), it is a process with high temperature and ultra-short time. However, the high temperature could cause the dopants diffusion and the ultra-short time might make the destroyed lattices repaired not completely. Ion implant with silicon at different temperature (80°C, and 150°C) into In0.47Ga0.53As(300 nm)/InP substrate, and annealed by low-energy MWA and traditional RTA, respectively to research SPER and electrical activation. By using Raman spectrum, we discover that using MWA energy 2.5P(1.5kW) for 100 s could make the III-V materials achieve SPER by repairing fully. From TEM images, the amorphous layer caused by ion implantation could be recovered to crystal lattices during implantation temperature at 150°C. After annealing by MWA 2.5P(1.5kW) for 100 s, the defects of stacking faults are repaired completely to attain SPER, and it can correspond the Raman results. By using SIMS analysis, it can demonstrate that MWA has better ability to control dopants diffusion. Finally, by using Photoluminescence spectroscopy analysis, the MWA energy 3P(1.8kW) for 100 s could just make silicon dopants get activation. After annealing by MWA 3.5P(2.1kW) for 100 s of implantation at 150°C has the best activation that it has the highest peak.
Abstract: As semiconductors devices scale down, silicon transistors would reach its limitation below 10 nm. Researching for the novel materials, which could replace silicon, is important. In this study, the new potential materials III-V Group compound semiconductors which are ion implanted with low energy and low dose. In order to keep the ultra-shallow junc...
Show More
-
Application and Development of Wavefront Sensor Technology
Suyang Zhao,
Xuemin Cheng
Issue:
Volume 6, Issue 3, May 2017
Pages:
154-159
Received:
6 June 2017
Published:
6 June 2017
Abstract: Wavefront sensing technology can directly test the phase distribution of wavefront distortion and has the advantages of simple operation, real-time and large dynamic range. It is widely used in adaptive optics, laser beam quality diagnosis, laser atmospheric communication, optical element and optics system detection, quantitative phase microscope, human eye aberration measurement and other fields. This paper mainly elaborates application and development of wavefront sensing technology in different fields. Combining with the research, wavefront sensing technology is utilized in the high-volume detection of aspherical mobile phone injection and the application advantages in aspheric injection molding lenses error, test efficiency and the number of quality evaluation parameters are illustrated.
Abstract: Wavefront sensing technology can directly test the phase distribution of wavefront distortion and has the advantages of simple operation, real-time and large dynamic range. It is widely used in adaptive optics, laser beam quality diagnosis, laser atmospheric communication, optical element and optics system detection, quantitative phase microscope, ...
Show More
-
Investigation of Corrosion Inhibition of Quaternary Ammonium Salt on N80 Steel in 5M HCl Solution
Yang Yaohui,
Li Lingjie,
Zhang Yanjun,
Lin Zhu,
Tong Hui
Issue:
Volume 6, Issue 3, May 2017
Pages:
160-164
Received:
6 June 2017
Published:
6 June 2017
Abstract: Corrosion inhibition of N80 in 5M HCl solution by pyridine quaternary ammonium salt has been studied by weight loss measurements, potentiodynamic test, Tafel polarization and electrochemical impedance. The results show that corrosion rates of N80 steel decrease with increase of inhibitor concentration in 5M HCl solution at temperature 333K and 363K. The adsorption of inhibitor on N80 steel was studied from the results of the weight loss experiment. The adsorption is in conformity with langmuir isothermal adsorption equation at 333 K, the value of indicates the adsorption were both chemical and physical adsorption.
Abstract: Corrosion inhibition of N80 in 5M HCl solution by pyridine quaternary ammonium salt has been studied by weight loss measurements, potentiodynamic test, Tafel polarization and electrochemical impedance. The results show that corrosion rates of N80 steel decrease with increase of inhibitor concentration in 5M HCl solution at temperature 333K and 363K...
Show More
