The interaction and adsorption of pristine and Cu-doped ZnO nanoparticles of ethanol (C2H6O) and several other gases are calculated. These gases include carbon dioxide (CO2), carbon monoxide (CO), ammonia (NH3), ozone (O3), nitrogen dioxide (NO2), and sulfur dioxide (SO2). Most of these gases are air pollutants. ZnO wurtzoid clusters are used to represent ZnO nanoparticles. Gibbs free energy and enthalpy of reactions are evaluated. Evans–Polanyi principle is used to evaluate the activation energy that gives the best fit to the Arrhenius equation of the reaction. The results of solving the reaction rate equations are used to compare with experimental findings. The reaction of gases with the air before reaching the sensor surface is included. A comparison of calculated response time (10.5 s), recovery time (470 s), and reaction rate with available experimental results is performed (9 and 420 s respectively) for 50 ppm of ethanol at room temperature. From results above, Evans–Polanyi principle combined with Arrhenius equation can give acceptable results. The response time is inversely proportional to gas concentration, while recovery time is linearly proportional to the gas concentration. A correlation factor can relate reaction rate with the response.
{"title":"Reaction mechanisms of pristine and Cu-doped ZnO clusters with ethanol using Evans–Polanyi principle","authors":"M. A. Abdulsattar, H. Abduljalil, H. Abed","doi":"10.1680/jemmr.22.00149","DOIUrl":"https://doi.org/10.1680/jemmr.22.00149","url":null,"abstract":"The interaction and adsorption of pristine and Cu-doped ZnO nanoparticles of ethanol (C2H6O) and several other gases are calculated. These gases include carbon dioxide (CO2), carbon monoxide (CO), ammonia (NH3), ozone (O3), nitrogen dioxide (NO2), and sulfur dioxide (SO2). Most of these gases are air pollutants. ZnO wurtzoid clusters are used to represent ZnO nanoparticles. Gibbs free energy and enthalpy of reactions are evaluated. Evans–Polanyi principle is used to evaluate the activation energy that gives the best fit to the Arrhenius equation of the reaction. The results of solving the reaction rate equations are used to compare with experimental findings. The reaction of gases with the air before reaching the sensor surface is included. A comparison of calculated response time (10.5 s), recovery time (470 s), and reaction rate with available experimental results is performed (9 and 420 s respectively) for 50 ppm of ethanol at room temperature. From results above, Evans–Polanyi principle combined with Arrhenius equation can give acceptable results. The response time is inversely proportional to gas concentration, while recovery time is linearly proportional to the gas concentration. A correlation factor can relate reaction rate with the response.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42707360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chao-pin Ma, Jun Shen, Hao Li, C. Zeng, Fuxing Xie
Nowadays, Resistance spot welding is a common welding method used in automobiles and other industries, and 7000 series Al alloy has become a very common industrial material because of its high strength and easy machinability. Scandium (Sc) is often used for alloy strengthening, however, there are few studies on resistance spot welding joint of Al alloy containing Sc. Here, 7075-T6 alloys containinga small amount of Sc were obtained to investigate the joint of resistance spot weldability. The simulation shows that the effective contact area between the Al sheet surface is about 19.5%, which is an important factor in nucleation. It has been found that the average grain size of the nugget decreased from 51.51 ± 5.74 μm to 8.15 ± 1.09 μm when Sc was added from 0 to 0.4 wt%, which is mainly due to the Al3Sc particles acting as the heterogeneous nucleus in the melt. The test results show that the tensile shear strength of welded joints with 0.4 wt% Sc addition is 29.2% higher than that of the joints without Sc because of grain refine strengthening.
{"title":"Research on microstructure and mechanical properties of RSW joints of 7075T-6 alloy containing Sc","authors":"Chao-pin Ma, Jun Shen, Hao Li, C. Zeng, Fuxing Xie","doi":"10.1680/jemmr.21.00142","DOIUrl":"https://doi.org/10.1680/jemmr.21.00142","url":null,"abstract":"Nowadays, Resistance spot welding is a common welding method used in automobiles and other industries, and 7000 series Al alloy has become a very common industrial material because of its high strength and easy machinability. Scandium (Sc) is often used for alloy strengthening, however, there are few studies on resistance spot welding joint of Al alloy containing Sc. Here, 7075-T6 alloys containinga small amount of Sc were obtained to investigate the joint of resistance spot weldability. The simulation shows that the effective contact area between the Al sheet surface is about 19.5%, which is an important factor in nucleation. It has been found that the average grain size of the nugget decreased from 51.51 ± 5.74 μm to 8.15 ± 1.09 μm when Sc was added from 0 to 0.4 wt%, which is mainly due to the Al3Sc particles acting as the heterogeneous nucleus in the melt. The test results show that the tensile shear strength of welded joints with 0.4 wt% Sc addition is 29.2% higher than that of the joints without Sc because of grain refine strengthening.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67477657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigates the relative effect of tribological process parameters and their optimization for wear responses of TiAlN thin film deposited on heat-treated and plasma nitrided novel MDC-K hot work tool steel. The effect of tribological process parameters was studied by conducting the tribological test on TiAlN thin film against Tungsten Carbide (WC) counterbody. There were three tribological process parameters considered namely: sliding velocity, applied load, and sliding distance to conduct the tribological test and study their effect on five different wear responses, namely friction coefficient (COF), surface roughness (Ra), wear depth (WD), wear mass loss (WML), and hardness (Hv). The relative effect of the process parameters was studied using counter plots and the individual effect and contribution were analyzed using the ANOVA test. Further, t overall evaluation criteria (OEC) method was employed to select the optimal setting of tribological process parameters based on the experimental results. Finally, the surface morphology of the worn TiAlN surface against the best and worst parametric settings was evaluated using EDS-integrated SEM to investigate the underlying wear mechanisms.
{"title":"Effect of tribological parameters and their optimization for wear responses of TiAlN coating","authors":"Sunil Kumar, S. Maity, Lokeswar Patnaik","doi":"10.1680/jemmr.22.00015","DOIUrl":"https://doi.org/10.1680/jemmr.22.00015","url":null,"abstract":"This study investigates the relative effect of tribological process parameters and their optimization for wear responses of TiAlN thin film deposited on heat-treated and plasma nitrided novel MDC-K hot work tool steel. The effect of tribological process parameters was studied by conducting the tribological test on TiAlN thin film against Tungsten Carbide (WC) counterbody. There were three tribological process parameters considered namely: sliding velocity, applied load, and sliding distance to conduct the tribological test and study their effect on five different wear responses, namely friction coefficient (COF), surface roughness (Ra), wear depth (WD), wear mass loss (WML), and hardness (Hv). The relative effect of the process parameters was studied using counter plots and the individual effect and contribution were analyzed using the ANOVA test. Further, t overall evaluation criteria (OEC) method was employed to select the optimal setting of tribological process parameters based on the experimental results. Finally, the surface morphology of the worn TiAlN surface against the best and worst parametric settings was evaluated using EDS-integrated SEM to investigate the underlying wear mechanisms.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41356926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.1680/jemmr.2023.12.1.1
H. Gu, F. Heim
{"title":"Editorial: A new stage of Emerging Materials Research – challenges and opportunities","authors":"H. Gu, F. Heim","doi":"10.1680/jemmr.2023.12.1.1","DOIUrl":"https://doi.org/10.1680/jemmr.2023.12.1.1","url":null,"abstract":"","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44061648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Talbi, I. Bozetine, S. Anas Boussaa, K. Benfadel, D. Allam, N. Rahim, Y. Ould Mohamed, M. Leitgeb, C. Torki, S. Hocine, F. Boudeffar, A. Manseri, S. Kaci
The present study was aimed to convert CO2 into value-added products such as methanol which not only could address the potential solution for controlling the CO2 concentration level in the atmosphere but also can offer an alternative approach for the production of renewable energy sources. In this perspective, various hybrid photoelectrocatalysts were synthesized, characterized and used as photocathodes for photoelectrocatalytic (PEC) reduction of CO2 to methanol in aqueous medium under visible light irradiation. Flat silicon (Siflat) and pyramidal textured silicon (SiPY) substrates, covered with polyaniline (PANI) with or without sensitization with copper oxide (Cu2O) particles were investigated. It was noticed that the combination of PANI and Cu2O greatly increased the PEC CO2 reduction to methanol owing to enhance the CO2 chemisorption capacity by the photocathode surface and at the same time facilitated the separation of photogenerated electron-hole (e−/h+) pairs. The PEC results demonstrated that the applied potential impacts the photocurrent stability. The sensitization with Cu2O effectively separate the photogenerated e−/h+ pairs and therefore, enhanced the PEC CO2 reduction activity of the hybrid photocatalyst. The best Faradaic efficiency (FE) for methanol formation reached 57.66 % which was recorded when Cu2O/PANI/SiPY heterostructure was used as photocathode at applied potential of −1.2V vs SCE.
目前的研究旨在将二氧化碳转化为甲醇等增值产品，这不仅可以解决控制大气中二氧化碳浓度水平的潜在解决方案，而且可以为生产可再生能源提供另一种方法。为此，本文合成了多种杂化光电催化剂，对其进行了表征，并将其作为光电阴极，在可见光照射下在水介质中进行了CO2光催化还原制甲醇的研究。研究了用氧化铜(Cu2O)颗粒敏化或不敏化聚苯胺(PANI)覆盖的平面硅(Siflat)和锥体织构硅(SiPY)衬底。结果表明，聚苯胺与Cu2O的结合提高了光电阴极表面对CO2的化学吸附能力，同时也促进了光生电子-空穴(e−/h+)对的分离，大大提高了光电阴极对CO2还原为甲醇的效率。PEC结果表明，外加电位对光电流稳定性有影响。Cu2O敏化能有效分离光生成的e−/h+对，从而提高了杂化光催化剂的PEC CO2还原活性。以Cu2O/PANI/SiPY异质结构为光电阴极，在- 1.2V vs SCE电位下，制备甲醇的最佳法拉第效率达到57.66%。
{"title":"Photoelectrochemical properties of Cu2O/PANI/Si-based photocathodes destined for CO2 conversion","authors":"L. Talbi, I. Bozetine, S. Anas Boussaa, K. Benfadel, D. Allam, N. Rahim, Y. Ould Mohamed, M. Leitgeb, C. Torki, S. Hocine, F. Boudeffar, A. Manseri, S. Kaci","doi":"10.1680/jemmr.22.00167","DOIUrl":"https://doi.org/10.1680/jemmr.22.00167","url":null,"abstract":"The present study was aimed to convert CO2 into value-added products such as methanol which not only could address the potential solution for controlling the CO2 concentration level in the atmosphere but also can offer an alternative approach for the production of renewable energy sources. In this perspective, various hybrid photoelectrocatalysts were synthesized, characterized and used as photocathodes for photoelectrocatalytic (PEC) reduction of CO2 to methanol in aqueous medium under visible light irradiation. Flat silicon (Siflat) and pyramidal textured silicon (SiPY) substrates, covered with polyaniline (PANI) with or without sensitization with copper oxide (Cu2O) particles were investigated. It was noticed that the combination of PANI and Cu2O greatly increased the PEC CO2 reduction to methanol owing to enhance the CO2 chemisorption capacity by the photocathode surface and at the same time facilitated the separation of photogenerated electron-hole (e−/h+) pairs. The PEC results demonstrated that the applied potential impacts the photocurrent stability. The sensitization with Cu2O effectively separate the photogenerated e−/h+ pairs and therefore, enhanced the PEC CO2 reduction activity of the hybrid photocatalyst. The best Faradaic efficiency (FE) for methanol formation reached 57.66 % which was recorded when Cu2O/PANI/SiPY heterostructure was used as photocathode at applied potential of −1.2V vs SCE.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43056317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ahmad Umar, Pranjal Srivastava, Sadanand, Shambhavi Rai, P. Lohia, D. K. Dwivedi, Hassan Algadi, S. Baskoutas
In the present work, lead-free perovskite solar cell has been structured using CH3NH3SnI3 as an absorber layer, P3HT acting as a HTL, and TiO2 as ETL material. Perovskite solar cell is the originating photovoltaic technology that shows great elevation in its performance during recent years. The fundamental n-i-p planar heterojunction structure of photovoltaic cells has been designed and simulated with solar cell capacitance simulation software (SCAPS-1D). In this study, different parameters like thickness, acceptor density, temperature, and defect density have been varied to increase the device performance. Optimum values of different parameters have been used to attain the good results of the photovoltaic device such as PCE, VOC, FF, and JSC of 27.54%, 1.0216 V, 86.56%, and 31.14 mA/cm2, respectively. The impact of acceptor density has been varied from 1x10−12 cm−3 to 1x10−20 cm−3 for the proposed device structure. Therefore, the PCE of this device structure increases by using different charge transport materials. This simulation study shows that the proposed cell structure can be used to construct the photovoltaic cell with higher efficiency.
{"title":"High-performance lead-free-perovskite solar cell: a theoretical study","authors":"Ahmad Umar, Pranjal Srivastava, Sadanand, Shambhavi Rai, P. Lohia, D. K. Dwivedi, Hassan Algadi, S. Baskoutas","doi":"10.1680/jemmr.22.00129","DOIUrl":"https://doi.org/10.1680/jemmr.22.00129","url":null,"abstract":"In the present work, lead-free perovskite solar cell has been structured using CH3NH3SnI3 as an absorber layer, P3HT acting as a HTL, and TiO2 as ETL material. Perovskite solar cell is the originating photovoltaic technology that shows great elevation in its performance during recent years. The fundamental n-i-p planar heterojunction structure of photovoltaic cells has been designed and simulated with solar cell capacitance simulation software (SCAPS-1D). In this study, different parameters like thickness, acceptor density, temperature, and defect density have been varied to increase the device performance. Optimum values of different parameters have been used to attain the good results of the photovoltaic device such as PCE, VOC, FF, and JSC of 27.54%, 1.0216 V, 86.56%, and 31.14 mA/cm2, respectively. The impact of acceptor density has been varied from 1x10−12 cm−3 to 1x10−20 cm−3 for the proposed device structure. Therefore, the PCE of this device structure increases by using different charge transport materials. This simulation study shows that the proposed cell structure can be used to construct the photovoltaic cell with higher efficiency.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44994826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cesium tin germanium triiodide (CsSn0.5Ge0.5I3) is one of the proficient inorganic halides the perovskites for better stability that has received wide attention in recent years. In the present study, a lead-free perovskite solar cell structure is designed with Zinc selenide as the electron transport layer (ETL), CsSn0.5Ge0.5I3 as the perovskite absorber layer, and PTAA [Poly(bis[4-phenyl]{2,4,6-trimethylphenyl}amine)] as the hole transport layer (HTL). For a more practical understanding of the solar cell, several parameters such as absorber thickness, defect density, doping concentration of absorber layer, interface defects, and working point temperature have been examined. SCAPS-1D simulator is used for the analysis of the proposed device. The PCE of the device has been obtained as 23.15% with VOC = 1.07 V, JSC = 27.24 mA/cm2, FF = 78.82 % at 800 nm thickness of CsSn0.5Ge0.5I3 absorber layer. Selecting the best material parameters and easy fabrication is suitable for developing highly efficient and environmentally friendly perovskite solar cells.
{"title":"Theoretical study of lead-free perovskite solar cell using ZnSe as ETL and PTAA as HTL","authors":"V. Srivastava, R. Chauhan, P. Lohia","doi":"10.1680/jemmr.22.00059","DOIUrl":"https://doi.org/10.1680/jemmr.22.00059","url":null,"abstract":"Cesium tin germanium triiodide (CsSn0.5Ge0.5I3) is one of the proficient inorganic halides the perovskites for better stability that has received wide attention in recent years. In the present study, a lead-free perovskite solar cell structure is designed with Zinc selenide as the electron transport layer (ETL), CsSn0.5Ge0.5I3 as the perovskite absorber layer, and PTAA [Poly(bis[4-phenyl]{2,4,6-trimethylphenyl}amine)] as the hole transport layer (HTL). For a more practical understanding of the solar cell, several parameters such as absorber thickness, defect density, doping concentration of absorber layer, interface defects, and working point temperature have been examined. SCAPS-1D simulator is used for the analysis of the proposed device. The PCE of the device has been obtained as 23.15% with VOC = 1.07 V, JSC = 27.24 mA/cm2, FF = 78.82 % at 800 nm thickness of CsSn0.5Ge0.5I3 absorber layer. Selecting the best material parameters and easy fabrication is suitable for developing highly efficient and environmentally friendly perovskite solar cells.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46174676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.1680/jemmr.2023.12.1.100
{"title":"Award-winning paper in 2021","authors":"","doi":"10.1680/jemmr.2023.12.1.100","DOIUrl":"https://doi.org/10.1680/jemmr.2023.12.1.100","url":null,"abstract":"","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135239068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The solid-state reaction technique is used to prepare the samples 0.3(BiFeO3)–0.7(PbZrO3) and 0.5(BiFeO3)–0.5(PbZrO3). Structural parameters including percent crystallinity, dislocation density, microstrain, and the average size of crystallites are calculated using the X-Ray Diffraction (XRD) data at room temperature. The SEM micrographs reveal the spherical, densely packed natures of the samples with low porosity. Dielectric constant and dielectric loss increases with the rising content of Bismuth ferrite in the materials. The performance of the materials as an NTC thermistor in the temperature range 300–450°C is discussed. The values of the Thermistor constant (i.e. in the range of 3911–6247K) and the range of sensitivity index (−1 to −9%) confirmed the potential use of the samples as NTC thermistors. The frequency-dependent ac conductivity satisfies the universal Jonscher power law. The high density of states is determined from the frequency and temperature-dependent ac conductivity of the materials.
{"title":"Structural, electrical, and thermistor behavior of BiFeO3-PbZrO3 for energy storage devices","authors":"P. Mallick, S. Biswal, S. K. Satpathy, B. Behera","doi":"10.1680/jemmr.21.00177","DOIUrl":"https://doi.org/10.1680/jemmr.21.00177","url":null,"abstract":"The solid-state reaction technique is used to prepare the samples 0.3(BiFeO3)–0.7(PbZrO3) and 0.5(BiFeO3)–0.5(PbZrO3). Structural parameters including percent crystallinity, dislocation density, microstrain, and the average size of crystallites are calculated using the X-Ray Diffraction (XRD) data at room temperature. The SEM micrographs reveal the spherical, densely packed natures of the samples with low porosity. Dielectric constant and dielectric loss increases with the rising content of Bismuth ferrite in the materials. The performance of the materials as an NTC thermistor in the temperature range 300–450°C is discussed. The values of the Thermistor constant (i.e. in the range of 3911–6247K) and the range of sensitivity index (−1 to −9%) confirmed the potential use of the samples as NTC thermistors. The frequency-dependent ac conductivity satisfies the universal Jonscher power law. The high density of states is determined from the frequency and temperature-dependent ac conductivity of the materials.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67477886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
One of the severe challenges in the oil, gas, and petrochemical industry is associated with reducing the costs of corrosion damages by removing the oil fluids’ moisture, and humidity in the facilities. As an essential component of moisture absorption towers in the dehumidification section is the bubble cap, which loses its efficiency in a short time due to continuous contact with steam. In the present work, the causes of the destruction of a piece of bubble cap are investigated thoroughly employing visual and microstructural observation, chemical composition study through quantometer, X-ray spectroscopy (EDS) and XRD assessments, and also the corrosion behavior study by polarization and electrochemical impedance spectrometry (EIS) analysis. The mechanism and type of corrosion occurred to the bubble cap and its capability against the corrosion were assessed. The results showed that the corrosion products after service were Fe3O4, Fe2O3, Fe(OH)3, and FeCO3, which declined the microhardness from 121.3 to 99.3 Hv. The corrosion rate was found to be 0.03116 mm/y in the saline solution. The poor performance of the material against corrosion were attributed to the casting defects, and the ineffective microstructural phases, formed due to the deficient alloying elements. According to the results, some recommendations and solutions, as effective preventive ways, have been proposed to hinder corrosion, and lead to the higher durability and the lower replacement costs.
{"title":"An investigation on the corrosion in the dehumidification bubble caps in the gas refinery","authors":"H. Mohammadzadeh, R. Jafari, Abolfazl Gheysvand","doi":"10.1680/jemmr.22.00227","DOIUrl":"https://doi.org/10.1680/jemmr.22.00227","url":null,"abstract":"One of the severe challenges in the oil, gas, and petrochemical industry is associated with reducing the costs of corrosion damages by removing the oil fluids’ moisture, and humidity in the facilities. As an essential component of moisture absorption towers in the dehumidification section is the bubble cap, which loses its efficiency in a short time due to continuous contact with steam. In the present work, the causes of the destruction of a piece of bubble cap are investigated thoroughly employing visual and microstructural observation, chemical composition study through quantometer, X-ray spectroscopy (EDS) and XRD assessments, and also the corrosion behavior study by polarization and electrochemical impedance spectrometry (EIS) analysis. The mechanism and type of corrosion occurred to the bubble cap and its capability against the corrosion were assessed. The results showed that the corrosion products after service were Fe3O4, Fe2O3, Fe(OH)3, and FeCO3, which declined the microhardness from 121.3 to 99.3 Hv. The corrosion rate was found to be 0.03116 mm/y in the saline solution. The poor performance of the material against corrosion were attributed to the casting defects, and the ineffective microstructural phases, formed due to the deficient alloying elements. According to the results, some recommendations and solutions, as effective preventive ways, have been proposed to hinder corrosion, and lead to the higher durability and the lower replacement costs.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67477682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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