Oladeji Oluremi Ige | Obafemi Awolowo University, Ile-Ife, Nigeria (original) (raw)

Papers by Oladeji Oluremi Ige

14th International Conference on Fracture, ICF 2017, 2017

14th International Conference on Fracture, ICF 2017, 2017

Ife Journal of Technology, May 1, 2011

Ife Journal of Technology, Nov 1, 2012

The study of chemical mitigation of erosion-corrosion of API-X65 Steel in a multiphase system con... more The study of chemical mitigation of erosion-corrosion of API-X65 Steel in a multiphase system containing brine, CO2 gas, and sand at different shear stresses with two eco-friendly inhibitors are reported. The inhibitors investigated are a commercial grade synthetic product and a natural inhibitor (Aloe vera). The mass loss, linear polarization, and scanning electron microscopy techniques were investigated. The results obtained show that both inhibitors maybe useful in oil and gas industry, the synthetic inhibitor have quantifiable advantage over the natural inhibitor. From the results obtained these inhibitors are expected to have credible technical performance and as such reduce considerably the adverse effects on health, safety, and environmental factors associated with inhibition in oil and gas industries.

Effects of sida acuta extract on the corrosion behaviour of API 5L-X65 steel under sand deposit i... more Effects of sida acuta extract on the corrosion behaviour of API 5L-X65 steel under sand deposit in CO2 saturated oilfield brine has been studied. Tafel extrapolation method has been employed to determine the corrosion rate of the alloy under sand deposit with and without sida acuta extract. Atomic force microscopy was employed to study the surface roughness of the steel. Phytochemical analysis and Fourier transformed infrared (FTIR) spectroscopy was used to identify the functional groups present in the extract. The presence of sand retarded the inhibitor efficiency at lower dosage but better corrosion inhibition was obtained at higher inhibitor dosage.

IOP Conference Series: Materials Science and Engineering, 2017

Conventional duplex stainless steel degrade in wear and mechanical properties at high temperature... more Conventional duplex stainless steel degrade in wear and mechanical properties at high temperature. Attempts have been made by researchers to solve this problems leading to the dispersion of second phase particles into duplex matrix. Powder metallurgy methods have been used to fabricate dispersion strengthened steels with a challenge of obtaining fully dense composite and grain growth. This could be resolved by appropriate selection of sintering parameters especially temperature. In this research, spark plasma sintering was utilized to fabricate nanostructured duplex stainless steel grade SAF 2205 with 5 wt.% nano TiN addition at different temperatures ranging from 1000 °C to 1200 °C. The effect of sintering temperature on the microstructure, density, hardness and wear of the samples was investigated. The results showed that the densities and grain sizes of the sintered nanocomposites increased with increasing the sintering temperature. The microstructures reveal ferrite and austenite grains with fine precipitates within the ferrite grains. The study of the hardness and wear behaviors, of the samples indicated that the optimum properties were obtained for the sintering temperature of 1150 °C.

Ceramic Transactions Series, 2018

Materials Today: Proceedings, 2020

Corrosion products play a prominent role in reducing the degradation rate of materials in harsh e... more Corrosion products play a prominent role in reducing the degradation rate of materials in harsh environments. In this work, the erosion-corrosion behaviour of duplex stainless steel (UNS S32205) in mine water, was characterised using X-ray diffraction and Raman spectrometry. The tests include erosioncorrosion in mine water and erosion in cathodically protected distilled water. X-ray diffraction and Raman spectroscopy were employed to confirm the presence of hydrolysed iron sulphate, chromium oxide, and hydrated iron oxides. The corrosion products were able to explain the effects of pH and flow velocity on the duplex stainless steel performance in the mine water environment.

Materials Today: Proceedings, 2020

This study investigated the effect of varying flow velocities on the corrosion behavior of titani... more This study investigated the effect of varying flow velocities on the corrosion behavior of titanium nitride reinforced Fe-Cr-Ni (Duplex Stainless Steel-UNS S32205) manufactured by spark plasma sintering. The TiN reinforcement was within the range of 0-8% at an interval of 2%. The spark plasma sintering parameters are sintering temperature (1150°C), sintering time (10 mins), applied pressure (50 Mpa) and heating rate (100°C/mins). The sintered samples were subjected to both gravimetric and electrochemical measurement in 3.5 wt% NaCl at a flow velocity of 1.0 m/s and increasing at 0.5 m/s till 2.5 m/s. A field emission scanning electron microscope (FESEM) equipped with energy dispersive x-ray spectrometer (EDS) was employed to carry out the microstructural characterizations of the corroded sintered products. The results showed that increasing the flow velocity decreased the passive current, but leads to more positive corrosion potential of the sintered products. The active-passive behaviour and the role of microstructures on the reinforced sintered composites in 3.5 wt% NaCl are discussed.

Materials Today: Proceedings, 2020

This study examined the corrosion behaviour of cold and hot rolled duplex stainless steel materia... more This study examined the corrosion behaviour of cold and hot rolled duplex stainless steel materials in mine water. Both gravimetric and electrochemical methods (potentiodynamic polarisation and open circuit potential) were adopted to monitor the corrosion of the alloys. Microscopy analyses were used to understand the degradation phenomena. In comparison, cold-rolled stainless steels displayed better resistance than hot-rolled materials under the tested conditions. The mine water pH was in the range that could lead to passivation of the sample and hence, the environmental impact was not aggressive enough to create many inferences. The surface deteriorations for cold and hot rolled steel materials were therefore not severe in both SEM (Scanning Electron Microscope) and OM (Optical Microscope) analysis results.

Journal of Advances in Mathematics and Computer Science, 2018

Journal of Bio- and Tribo-Corrosion, 2018

This study provides information on the performance of three stainless steels at various shear str... more This study provides information on the performance of three stainless steels at various shear stresses and presence of silica sand particles in simulated mine water. The materials employed were two duplex stainless steels (UNS S32205 and UNS S32750) and one austenitic stainless steel (UNS 30403). The rotating cylinder electrode system produced shear stresses to evaluate the flow-induced and erosion-corrosion tests by open-circuit potential and potentiodynamic polarization techniques. Hardness tests were used to examine the performance of the degraded samples, and scanning electron microscopy was used to characterize the surface morphology. UNS S32750 displayed nobler OCP compared with UNS S32205 with austenitic steel having the least potential irrespective of the shear stresses and with/without silica sand. Work hardening of the duplex stainless steels promoted variable behavior in the hardness results. The current density results revealed that UNS S32705 had the best corrosion performance in the studied environments. The SEM images showed plastic deformation, material dissolution and pitting corrosion as the shear stress increased and on the introduction of silica sand.

Developments in Corrosion Protection, 2014

ISRN Materials Science, 2012

The development of natural biomaterials is not regarded as a new area of science, but has existed... more The development of natural biomaterials is not regarded as a new area of science, but has existed for centuries. The use of natural products as a biomaterial is currently undergoing a renaissance in the biomedical field. The major limitations of natural biomaterials are due to the immunogenic response that can occur following implantation and the lot-to-lot variability in molecular structure associated with animal sourcing. The chemical stability and biocompatibility of natural products in the body greatly accounts for their utilization in recent times. The paper succinctly defines biomaterials in terms of natural products and also that natural products as materials in biomedical fields are considerably versatile and promising. The various types of natural products and forms of biomaterials are highlighted. Three main areas of applications of natural products as materials in medicine are described, namely, wound management products, drug delivery systems, and tissue engineering. Thi...

Trends Biomater. Artif. …, 2009

... In addition, calcium phosphate surface films can be naturally formed on titanium alloys in a ... more ... In addition, calcium phosphate surface films can be naturally formed on titanium alloys in a biological environment [Hanawa & Ota, 1991; Hanawa, 1999; Demri et al, 1997] which can act as a further barrier against ion diffusion from the subsurface alloy. ...

2018 IEEE 9th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT)

The Potentiodynamic polarization and chronoamperometry tests were employed to investigate the cor... more The Potentiodynamic polarization and chronoamperometry tests were employed to investigate the corrosion performance of sintered Ti-6Al-4V reinforced with nanosize titanium nitride in NaCl, HCl and H2SO4 solutions. Scanning electron microscopy (SEM) was used to study the surface morphology of the corroded samples after the chronoamperometry tests. The corrosion behaviour of the titanium matrix composite shows that TiN can provide an effective protection for Ti-6Al-4V alloy in sodium chloride, hydrochloric and sulphuric acids. Ti-6Al-4V reinforced with 4 vol% TiN displayed superior corrosion performance as compared to the sintered Ti-6Al-4V.

The International Journal of Advanced Manufacturing Technology

Although SPS has been studied for a rapidly growing number of materials, there is limited number ... more Although SPS has been studied for a rapidly growing number of materials, there is limited number of researches on the fabrication and microstructural characterization of stainless steels processed by SPS. This article reviewed and provided a critical discussion on the mechanical alloying (MA) and spark plasma sintering (SPS) of dispersion-strengthened stainless steel with emphasis on process parameters, reinforcement efficiencies, microstructural evolutions, and mechanical properties. The influence of spark plasma sintering process parameters on microstructure, phase evolution, and mechanical properties of reinforced stainless steels is reviewed in this work. The role of alloying elements and ceramic reinforcements, their dispersion into the stainless steel matrix, and the importance of matrix-reinforcement interface are highlighted. Current and potential areas of applications of PM stainless steel and suggestions for future research are discussed in this paper.

2018 IEEE 9th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT), 2018

The In this study, duplex stainless steel containing 5 vol% TiN nanoparticles was fabricated by m... more The In this study, duplex stainless steel containing 5 vol% TiN nanoparticles was fabricated by means of spark plasma sintering (SPS). The effect of sintering holding time, microstructure, density, microhardness, corrosion and wear was investigated. The results showed that ferrite and austenite were the dominant phase. New phase of chromium nitride precipitated (Cr2N) was formed when sintering holding time was increased above 5 min. The volume fraction of the precipitated nitrides increased with the increase in the holding time. The microhardness and density of the composites was increased with the increase in holding time. The corrosion resistance of the composites degraded with the increase in the holding time while, the best wear performance was attained with 10 min holding time.

Densification mechanism of Ti–6Al–4V–TiN–TiCN powders was processed using spark plasma sintering ... more Densification mechanism of Ti–6Al–4V–TiN–TiCN powders was processed using spark plasma sintering route. The powder consolidation was carried out at the temperatures of 1000 °C to 1100 °C and constant pressure of 50 MPa with different holding time of 10 and 20 mins. The relative density of the sintered sample reaches 99%, which was as a function of the SPS conditions. Results indicates that with rising in sintering temperatures, relative densities of the composites were found to be increasing, while the microstructure shows some level of rapid growth and provided the optimal combination of dense microstructure. The fractography of the sintered samples at different temperatures and holding time was observed to investigate the sintering mechanism as well.

International Journal of Green Energy, 2021

The field of proton exchange membrane fuel cells (PEMFCs) has been of primary interest in transpo... more The field of proton exchange membrane fuel cells (PEMFCs) has been of primary interest in transportation applications as a result of their low pollutant emissions and relatively high efficiency. Bipolar plates are the vital components of these devices and are often exposed to corrosive environments due to their operational processes. Potentiodynamic polarization is used by researchers to investigate the material behavior of BPP used in the PEMFC applications. This paper aims to describe the application of electrochemical analysis in understanding the material behavior of PEMFC components, with a particular focus on the utilization of potentiodynamic polarization to provide material degradation information of bipolar plates. The potentiodynamic polarization test examines the material behavior of BPPs in terms of using voltage and current density change. This paper, therefore, combined potential applications of potentiodynamic polarization analysis technique to explore the BPP materia...

14th International Conference on Fracture, ICF 2017, 2017

14th International Conference on Fracture, ICF 2017, 2017

Ife Journal of Technology, May 1, 2011

Ife Journal of Technology, Nov 1, 2012

The study of chemical mitigation of erosion-corrosion of API-X65 Steel in a multiphase system con... more The study of chemical mitigation of erosion-corrosion of API-X65 Steel in a multiphase system containing brine, CO2 gas, and sand at different shear stresses with two eco-friendly inhibitors are reported. The inhibitors investigated are a commercial grade synthetic product and a natural inhibitor (Aloe vera). The mass loss, linear polarization, and scanning electron microscopy techniques were investigated. The results obtained show that both inhibitors maybe useful in oil and gas industry, the synthetic inhibitor have quantifiable advantage over the natural inhibitor. From the results obtained these inhibitors are expected to have credible technical performance and as such reduce considerably the adverse effects on health, safety, and environmental factors associated with inhibition in oil and gas industries.

Effects of sida acuta extract on the corrosion behaviour of API 5L-X65 steel under sand deposit i... more Effects of sida acuta extract on the corrosion behaviour of API 5L-X65 steel under sand deposit in CO2 saturated oilfield brine has been studied. Tafel extrapolation method has been employed to determine the corrosion rate of the alloy under sand deposit with and without sida acuta extract. Atomic force microscopy was employed to study the surface roughness of the steel. Phytochemical analysis and Fourier transformed infrared (FTIR) spectroscopy was used to identify the functional groups present in the extract. The presence of sand retarded the inhibitor efficiency at lower dosage but better corrosion inhibition was obtained at higher inhibitor dosage.

IOP Conference Series: Materials Science and Engineering, 2017

Conventional duplex stainless steel degrade in wear and mechanical properties at high temperature... more Conventional duplex stainless steel degrade in wear and mechanical properties at high temperature. Attempts have been made by researchers to solve this problems leading to the dispersion of second phase particles into duplex matrix. Powder metallurgy methods have been used to fabricate dispersion strengthened steels with a challenge of obtaining fully dense composite and grain growth. This could be resolved by appropriate selection of sintering parameters especially temperature. In this research, spark plasma sintering was utilized to fabricate nanostructured duplex stainless steel grade SAF 2205 with 5 wt.% nano TiN addition at different temperatures ranging from 1000 °C to 1200 °C. The effect of sintering temperature on the microstructure, density, hardness and wear of the samples was investigated. The results showed that the densities and grain sizes of the sintered nanocomposites increased with increasing the sintering temperature. The microstructures reveal ferrite and austenite grains with fine precipitates within the ferrite grains. The study of the hardness and wear behaviors, of the samples indicated that the optimum properties were obtained for the sintering temperature of 1150 °C.

Ceramic Transactions Series, 2018

Materials Today: Proceedings, 2020

Corrosion products play a prominent role in reducing the degradation rate of materials in harsh e... more Corrosion products play a prominent role in reducing the degradation rate of materials in harsh environments. In this work, the erosion-corrosion behaviour of duplex stainless steel (UNS S32205) in mine water, was characterised using X-ray diffraction and Raman spectrometry. The tests include erosioncorrosion in mine water and erosion in cathodically protected distilled water. X-ray diffraction and Raman spectroscopy were employed to confirm the presence of hydrolysed iron sulphate, chromium oxide, and hydrated iron oxides. The corrosion products were able to explain the effects of pH and flow velocity on the duplex stainless steel performance in the mine water environment.

Materials Today: Proceedings, 2020

This study investigated the effect of varying flow velocities on the corrosion behavior of titani... more This study investigated the effect of varying flow velocities on the corrosion behavior of titanium nitride reinforced Fe-Cr-Ni (Duplex Stainless Steel-UNS S32205) manufactured by spark plasma sintering. The TiN reinforcement was within the range of 0-8% at an interval of 2%. The spark plasma sintering parameters are sintering temperature (1150°C), sintering time (10 mins), applied pressure (50 Mpa) and heating rate (100°C/mins). The sintered samples were subjected to both gravimetric and electrochemical measurement in 3.5 wt% NaCl at a flow velocity of 1.0 m/s and increasing at 0.5 m/s till 2.5 m/s. A field emission scanning electron microscope (FESEM) equipped with energy dispersive x-ray spectrometer (EDS) was employed to carry out the microstructural characterizations of the corroded sintered products. The results showed that increasing the flow velocity decreased the passive current, but leads to more positive corrosion potential of the sintered products. The active-passive behaviour and the role of microstructures on the reinforced sintered composites in 3.5 wt% NaCl are discussed.

Materials Today: Proceedings, 2020

This study examined the corrosion behaviour of cold and hot rolled duplex stainless steel materia... more This study examined the corrosion behaviour of cold and hot rolled duplex stainless steel materials in mine water. Both gravimetric and electrochemical methods (potentiodynamic polarisation and open circuit potential) were adopted to monitor the corrosion of the alloys. Microscopy analyses were used to understand the degradation phenomena. In comparison, cold-rolled stainless steels displayed better resistance than hot-rolled materials under the tested conditions. The mine water pH was in the range that could lead to passivation of the sample and hence, the environmental impact was not aggressive enough to create many inferences. The surface deteriorations for cold and hot rolled steel materials were therefore not severe in both SEM (Scanning Electron Microscope) and OM (Optical Microscope) analysis results.

Journal of Advances in Mathematics and Computer Science, 2018

Journal of Bio- and Tribo-Corrosion, 2018

This study provides information on the performance of three stainless steels at various shear str... more This study provides information on the performance of three stainless steels at various shear stresses and presence of silica sand particles in simulated mine water. The materials employed were two duplex stainless steels (UNS S32205 and UNS S32750) and one austenitic stainless steel (UNS 30403). The rotating cylinder electrode system produced shear stresses to evaluate the flow-induced and erosion-corrosion tests by open-circuit potential and potentiodynamic polarization techniques. Hardness tests were used to examine the performance of the degraded samples, and scanning electron microscopy was used to characterize the surface morphology. UNS S32750 displayed nobler OCP compared with UNS S32205 with austenitic steel having the least potential irrespective of the shear stresses and with/without silica sand. Work hardening of the duplex stainless steels promoted variable behavior in the hardness results. The current density results revealed that UNS S32705 had the best corrosion performance in the studied environments. The SEM images showed plastic deformation, material dissolution and pitting corrosion as the shear stress increased and on the introduction of silica sand.

Developments in Corrosion Protection, 2014

ISRN Materials Science, 2012

The development of natural biomaterials is not regarded as a new area of science, but has existed... more The development of natural biomaterials is not regarded as a new area of science, but has existed for centuries. The use of natural products as a biomaterial is currently undergoing a renaissance in the biomedical field. The major limitations of natural biomaterials are due to the immunogenic response that can occur following implantation and the lot-to-lot variability in molecular structure associated with animal sourcing. The chemical stability and biocompatibility of natural products in the body greatly accounts for their utilization in recent times. The paper succinctly defines biomaterials in terms of natural products and also that natural products as materials in biomedical fields are considerably versatile and promising. The various types of natural products and forms of biomaterials are highlighted. Three main areas of applications of natural products as materials in medicine are described, namely, wound management products, drug delivery systems, and tissue engineering. Thi...

Trends Biomater. Artif. …, 2009

... In addition, calcium phosphate surface films can be naturally formed on titanium alloys in a ... more ... In addition, calcium phosphate surface films can be naturally formed on titanium alloys in a biological environment [Hanawa & Ota, 1991; Hanawa, 1999; Demri et al, 1997] which can act as a further barrier against ion diffusion from the subsurface alloy. ...

2018 IEEE 9th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT)

The Potentiodynamic polarization and chronoamperometry tests were employed to investigate the cor... more The Potentiodynamic polarization and chronoamperometry tests were employed to investigate the corrosion performance of sintered Ti-6Al-4V reinforced with nanosize titanium nitride in NaCl, HCl and H2SO4 solutions. Scanning electron microscopy (SEM) was used to study the surface morphology of the corroded samples after the chronoamperometry tests. The corrosion behaviour of the titanium matrix composite shows that TiN can provide an effective protection for Ti-6Al-4V alloy in sodium chloride, hydrochloric and sulphuric acids. Ti-6Al-4V reinforced with 4 vol% TiN displayed superior corrosion performance as compared to the sintered Ti-6Al-4V.

The International Journal of Advanced Manufacturing Technology

Although SPS has been studied for a rapidly growing number of materials, there is limited number ... more Although SPS has been studied for a rapidly growing number of materials, there is limited number of researches on the fabrication and microstructural characterization of stainless steels processed by SPS. This article reviewed and provided a critical discussion on the mechanical alloying (MA) and spark plasma sintering (SPS) of dispersion-strengthened stainless steel with emphasis on process parameters, reinforcement efficiencies, microstructural evolutions, and mechanical properties. The influence of spark plasma sintering process parameters on microstructure, phase evolution, and mechanical properties of reinforced stainless steels is reviewed in this work. The role of alloying elements and ceramic reinforcements, their dispersion into the stainless steel matrix, and the importance of matrix-reinforcement interface are highlighted. Current and potential areas of applications of PM stainless steel and suggestions for future research are discussed in this paper.

2018 IEEE 9th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT), 2018

The In this study, duplex stainless steel containing 5 vol% TiN nanoparticles was fabricated by m... more The In this study, duplex stainless steel containing 5 vol% TiN nanoparticles was fabricated by means of spark plasma sintering (SPS). The effect of sintering holding time, microstructure, density, microhardness, corrosion and wear was investigated. The results showed that ferrite and austenite were the dominant phase. New phase of chromium nitride precipitated (Cr2N) was formed when sintering holding time was increased above 5 min. The volume fraction of the precipitated nitrides increased with the increase in the holding time. The microhardness and density of the composites was increased with the increase in holding time. The corrosion resistance of the composites degraded with the increase in the holding time while, the best wear performance was attained with 10 min holding time.

Densification mechanism of Ti–6Al–4V–TiN–TiCN powders was processed using spark plasma sintering ... more Densification mechanism of Ti–6Al–4V–TiN–TiCN powders was processed using spark plasma sintering route. The powder consolidation was carried out at the temperatures of 1000 °C to 1100 °C and constant pressure of 50 MPa with different holding time of 10 and 20 mins. The relative density of the sintered sample reaches 99%, which was as a function of the SPS conditions. Results indicates that with rising in sintering temperatures, relative densities of the composites were found to be increasing, while the microstructure shows some level of rapid growth and provided the optimal combination of dense microstructure. The fractography of the sintered samples at different temperatures and holding time was observed to investigate the sintering mechanism as well.

International Journal of Green Energy, 2021

The field of proton exchange membrane fuel cells (PEMFCs) has been of primary interest in transpo... more The field of proton exchange membrane fuel cells (PEMFCs) has been of primary interest in transportation applications as a result of their low pollutant emissions and relatively high efficiency. Bipolar plates are the vital components of these devices and are often exposed to corrosive environments due to their operational processes. Potentiodynamic polarization is used by researchers to investigate the material behavior of BPP used in the PEMFC applications. This paper aims to describe the application of electrochemical analysis in understanding the material behavior of PEMFC components, with a particular focus on the utilization of potentiodynamic polarization to provide material degradation information of bipolar plates. The potentiodynamic polarization test examines the material behavior of BPPs in terms of using voltage and current density change. This paper, therefore, combined potential applications of potentiodynamic polarization analysis technique to explore the BPP materia...