ABSTRACT We are reporting green capsicum annuum fruit extract as inhibitor for mild steel corrosi... more ABSTRACT We are reporting green capsicum annuum fruit extract as inhibitor for mild steel corrosion in acid solution. Inhibition potential of this aqueous fruit extract has been determined with the help of weight loss method and electrochemical techniques. Results obtained by various techniques are close to each other and maximum efficiency of 85 % is acknowledged at the inhibitor concentration of 1400 mgl-1. Langmuir isotherm model is found most suitable to explain adsorption behavior of inhibitor for mild steel surface. Molecular adsorption of inhibitor over mild steel surface is found responsible for corrosion inhibition of mild steel in acid which is also supported by OEM studies.
We are reporting green capsicum annuum fruit extract as inhibitor for mild steel corrosion in aci... more We are reporting green capsicum annuum fruit extract as inhibitor for mild steel corrosion in acid solution. Inhibition potential of this aqueous fruit extract has been determined with the help of weight loss method and electrochemical techniques. Results obtained by various techniques are close to each other and maximum efficiency of 85 % is acknowledged at the inhibitor concentration of 1400 mgl-1 Langmuir isotherm model is found most suitable to explain adsorption behavior of inhibitor for mild steel surface. Molecular adsorption of inhibitor over mild steel surface is found responsible for corrosion inhibition of mild steel in acid which is also supported by OEM studies.
Titanium and titanium alloys are extensively used in biomedical, cardiac and cardiovascular appli... more Titanium and titanium alloys are extensively used in biomedical, cardiac and cardiovascular applications for their superb properties, such as good fatigue strength, low modulus, machinability, formability, corrosion resistance and biocompatibility. However, titanium and its alloys do not meet the majority of all clinical necessities. Due to these reasons, surface modification is frequently performed to enhance the mechanical, biological and chemical properties of titanium and alloys. In this work, nanocomposites coating of poly(-caprolactone)/hydroxyapatite/forsterite (PCL/HA/F) have been successfully deposited on the Ti6Al4V substratesby dip coating at room temperature. The coatings are prepared with various concentrations of forsterite/hydroxyapatite nanopowder (2, 4, 6 and 8 wt.%) with a fixed concentration of PCL (4 wt.%) and thus coated Ti6Al4V substrates are examined for corrosion resistance. PCL/Hydroxyapatite/Forsterite coatings are characterized by X-ray diffraction (XRD) ...
Inhibitors are one of the most effective methods for mitigation of metallic corrosion. However, b... more Inhibitors are one of the most effective methods for mitigation of metallic corrosion. However, biodegradable inhibitors are being preferred to synthetic inhibitors because of their high competency to suppress corrosion, low-pricing and zero toxicity. In this work, a similar kind of biodegradable material (Camellia Sinensis Assamica) is used for mitigation of mild steel (MS) corrosion in 0.5 M NaCl. Aqueous extract of Camellia Sinensis Assamica (AECSA) is checked for biomolecules by UV–visible and FTIR spectroscopy. The quantification of inhibition efficiency of AECSA is done by weight loss and electrochemical measurements. The maximum inhibition of MS corrosion (85%) is acknowledged with 1000 mg L−1 AECSA. The qualitative inhibition efficiency of AECSA is investigated up to 96 Hr immersion of MS in 0.5 M NaCl by Scanning electron microscopy (SEM) and it is revealed that a layer of AECSA is protecting MS in NaCl solution. The adsorption pattern of AECSA molecules is studied by isotherm fitting and it is found to go with Langmuir isotherm. It is also known through investigation that adsorption occurs in both physical and chemical modes. Furthermore, the adsorption characteristics of AECSA molecules is studied by DFT calculations and it is suggested that the constituent molecules may donate and accept electrons from MS during bond formation, and thus can protect MS in NaCl. Based on total investigation, a mechanism of corrosion inhibition is also proposed.
2021 Smart Technologies, Communication and Robotics (STCR), 2021
In order to avoid regulatory violations, downtime, or fatal disasters, industrial assets must be ... more In order to avoid regulatory violations, downtime, or fatal disasters, industrial assets must be maintained in a timely manner. One of the biggest factors for timely maintenance is corrosion of the assets. Corrosion causes generation of irregular surfaces that look bad in appearance and can produce serious problems. To avoid corrosion problems, timely maintenance must be scheduled well in advance. For this, images based corrosion detection can be a useful tool with respect to real time corrosion tests. In this work, images based corrosion detection is performed using Deep-learning UNET-8layer architecture. More than 400 images of corrosion data with their binary ground truth labels are trained to analyze and classify the corroded region in the images. After training, the model is tested and it is found that the prediction over corroded part of original image data can be done with the model with binary accuracy of 95.28% and validation binary accuracy of 96.87%.
Abstract Corrosion of low carbon steels is a big constraint in their smooth use for engineering a... more Abstract Corrosion of low carbon steels is a big constraint in their smooth use for engineering applications. Corrosion not only destroys their designed properties but also harms their physical appearance. Several researchers are working to minimize the effect of corrosion on low carbon steel. In this regard, they have consumed a lot of synthetic and natural materials till date. Nowadays, researchers are showing their trust on natural materials for corrosion inhibition application due to their easy availability, negligible toxicity and easy synthesis process as well as eco-friendly nature. It is an established fact that waste natural materials (WNMs) like banana peels have very high potential for being used in corrosion inhibition application due to their bioactive contents. However, WNMs have not been explored frequently by the researches despite their supreme technical and economical importance in corrosion inhibition. In this work, ethanol extract of waste potato peels is used for corrosion inhibition of low carbon steel in 0.5 M NaCl. The inhibition properties of the extract are determined by weight loss measurements, open circuit potential (OCP) curves, electrochemical impedance spectroscopy (EIS), Tafel polarization curves and linear polarization resistance (LPR) techniques. Results show that maximum corrosion inhibition efficiency of 70% has been achieved using 1000 mg L−1 of the extract. Scanning electron microscopy (SEM) and energy dispersive X-RD Spectroscopy (EDX) has also shown that the extract has successfully protected low carbon steel in 0.5 NaCl.
Abstract Corrosion of metals is a serious problem for the economy and human lives of any country.... more Abstract Corrosion of metals is a serious problem for the economy and human lives of any country. Several researchers have been working to minimize the loss of corrosion damage. Green corrosion inhibitors (GCI) are a simple solution of the corrosion problem since GCI is non– toxic, efficient in corrosion inhibition, biodegradable and available at low cost. In this regard waste natural materials (WNM) have attracted a great attention of the scientists since their use as corrosion inhibitors is economic, safe and eco-friendly (recycling of the waste). In this work, Solanum melongena steam (brinjal cap) aqueous extract (SMSAE) is used for corrosion inhibition of low carbon steel (LCS) in 1 M NaCl. The extract is characterized by Uv–visible and FTIR spectroscopy, which suggest that the extract is electrochemical active. The corrosion inhibition properties of the extract was determined by weight loss measurements, electrochemical impedance spectroscopy (EIS), open circuit potential (OCP) curves and Tafel polarization curves (TPC). The results show that the extract is giving inhibition efficiency > 70% at 500 mg L-1 of the extract. Surface and compositional analysis was performed by Scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy, which evidently illustrate that the extract is successfully inhibiting corrosion of mild steel in 1 M NaCl. It can be said based on results that SMSAE (WNM) is providing good inhibition efficiency and can be used in different applications.
Copper is one of the most demanded commercial metal/alloys in world market. The demand for copper... more Copper is one of the most demanded commercial metal/alloys in world market. The demand for copper in industries such as electrical, electronics, automobile, telecommunications, defence, etc. as well as in daily life has escalated in the recent years due to its versatile physical and chemical properties. However destruction of copper surface by any means, preferably corrosion, can limit its vast application. For protection from corrosion, various techniques are used to coat metal substrates with passivating materials. These techniques are either complex as well as expensive, or provide incomplete protection in acid media. To address these issues, floating film transfer method (FFTM) is utilized in this work for obtaining ultrathin film of squaraine (passivating molecule) as well as their easy and fast transfer over copper substrate. The squaraine film is deposited on copper substrate in layers, viz., 1 to 4 layers. The corrosion behavior is examined in 0.1 M HCl using electrochemical...
Abstract Donor-π-Acceptor (D-π-A) type compounds are very interesting for corrosion study since t... more Abstract Donor-π-Acceptor (D-π-A) type compounds are very interesting for corrosion study since they have unique structural configuration. Their high chemical reactivity promotes an easy bonding with the metals, which helps in corrosion inhibition. In this work, ethyl-2-cyano-3-(4-(dimethylamino) phenyl) acrylate (ECDPA) (a D-π-A type compound) is used to restrict the copper loss in 1 M HCl. The impedance analysis portrays that ECDPA saves 75% of copper at its maximum concentration in HCl solution. To further increase the inhibition efficiency, ECDPA-ZnO composites are developed. The ZnO is synthesized hydrothermally and calcined at two different temperatures (300 °C and 500 °C). The morphology of synthesized ZnO changes drastically with calcination; however, the main morphological difference in ZnO at 300 °C (Z3) and ZnO at 500 °C (Z5) is increment of porosity. Hence, two composites are made to analyze the change in corrosion behavior of the composites. The composites are designated as: ECDPA-ZnO at 300 °C to EZ3 and ECDPA-ZnO at 500 °C to EZ5. The characterizations of ZnO, ECDPA and ECDPA-ZnO composites have been performed by UV–visible spectroscopy, FTIR spectroscopy, HRTEM, HRSEM, EDAX and XRD techniques. The corrosion inhibition efficiencies of EZ3 and EZ5 are achieved as 78% and 81%. This fact suggests that ZnO increases the adsorption of ECDPA over copper surface, which is confirmed by Langmuir adsorption analysis and electrochemical atomic force microscopy (EC-AFM) measurements.
Abstract Prunus dulcis (almond) is one of the most commonly ingested dry fruits by peoples in the... more Abstract Prunus dulcis (almond) is one of the most commonly ingested dry fruits by peoples in their routine diet plan due to its high nutrition content. However, almond peels are not eaten and thrown as a waste material. The reason is that the peels are not easily digested in human body due to its low solubility in aqueous medium. Also, the peels contain low amount of cyanides. Surprisingly, almond peels also contain various active bio-compounds which have not been explored properly for any industrial purpose. With the idea of utilizing a waste material and checking solution dependability, the aqueous and methanolic extracts of almond peels have been prepared and investigated by experimental techniques and theoretical tools. The protection efficiency of the extracts in reduction of mild steel (MS) dissolution in 0.1 M HCl has been determined by electrochemical methods (impedance analysis and polarization behavior). The results shows that methanolic and aqueous extracts avert 93% and 85% mild steel loss respectively, which portray that methanolic extract is more effective than aqueous extract. This fact is supported by the surface analysis of mild steel samples done by HRSEM and AFM. UV–vis and FTIR spectroscopy analysis reveals the reason that methanol can extract more phytochemcial constituents of almond peels than water. The free energies of adsorption (ΔG°) for both extract's molecules have been determined based on adsorption coefficient (Kads) obtained from Langmuir isotherm fitting of inhibition data, which suggest that adsorption is neither pure physical nor pure chemical, i.e., mixed type. DFT modeling and Monte carlo simulation techniques are also explored to investigate theoretical adsorption and inhibition characteristics of the molecules, which supports the interpretation of the experimental results.
ABSTRACT We are reporting green capsicum annuum fruit extract as inhibitor for mild steel corrosi... more ABSTRACT We are reporting green capsicum annuum fruit extract as inhibitor for mild steel corrosion in acid solution. Inhibition potential of this aqueous fruit extract has been determined with the help of weight loss method and electrochemical techniques. Results obtained by various techniques are close to each other and maximum efficiency of 85 % is acknowledged at the inhibitor concentration of 1400 mgl-1. Langmuir isotherm model is found most suitable to explain adsorption behavior of inhibitor for mild steel surface. Molecular adsorption of inhibitor over mild steel surface is found responsible for corrosion inhibition of mild steel in acid which is also supported by OEM studies.
We are reporting green capsicum annuum fruit extract as inhibitor for mild steel corrosion in aci... more We are reporting green capsicum annuum fruit extract as inhibitor for mild steel corrosion in acid solution. Inhibition potential of this aqueous fruit extract has been determined with the help of weight loss method and electrochemical techniques. Results obtained by various techniques are close to each other and maximum efficiency of 85 % is acknowledged at the inhibitor concentration of 1400 mgl-1 Langmuir isotherm model is found most suitable to explain adsorption behavior of inhibitor for mild steel surface. Molecular adsorption of inhibitor over mild steel surface is found responsible for corrosion inhibition of mild steel in acid which is also supported by OEM studies.
Titanium and titanium alloys are extensively used in biomedical, cardiac and cardiovascular appli... more Titanium and titanium alloys are extensively used in biomedical, cardiac and cardiovascular applications for their superb properties, such as good fatigue strength, low modulus, machinability, formability, corrosion resistance and biocompatibility. However, titanium and its alloys do not meet the majority of all clinical necessities. Due to these reasons, surface modification is frequently performed to enhance the mechanical, biological and chemical properties of titanium and alloys. In this work, nanocomposites coating of poly(-caprolactone)/hydroxyapatite/forsterite (PCL/HA/F) have been successfully deposited on the Ti6Al4V substratesby dip coating at room temperature. The coatings are prepared with various concentrations of forsterite/hydroxyapatite nanopowder (2, 4, 6 and 8 wt.%) with a fixed concentration of PCL (4 wt.%) and thus coated Ti6Al4V substrates are examined for corrosion resistance. PCL/Hydroxyapatite/Forsterite coatings are characterized by X-ray diffraction (XRD) ...
Inhibitors are one of the most effective methods for mitigation of metallic corrosion. However, b... more Inhibitors are one of the most effective methods for mitigation of metallic corrosion. However, biodegradable inhibitors are being preferred to synthetic inhibitors because of their high competency to suppress corrosion, low-pricing and zero toxicity. In this work, a similar kind of biodegradable material (Camellia Sinensis Assamica) is used for mitigation of mild steel (MS) corrosion in 0.5 M NaCl. Aqueous extract of Camellia Sinensis Assamica (AECSA) is checked for biomolecules by UV–visible and FTIR spectroscopy. The quantification of inhibition efficiency of AECSA is done by weight loss and electrochemical measurements. The maximum inhibition of MS corrosion (85%) is acknowledged with 1000 mg L−1 AECSA. The qualitative inhibition efficiency of AECSA is investigated up to 96 Hr immersion of MS in 0.5 M NaCl by Scanning electron microscopy (SEM) and it is revealed that a layer of AECSA is protecting MS in NaCl solution. The adsorption pattern of AECSA molecules is studied by isotherm fitting and it is found to go with Langmuir isotherm. It is also known through investigation that adsorption occurs in both physical and chemical modes. Furthermore, the adsorption characteristics of AECSA molecules is studied by DFT calculations and it is suggested that the constituent molecules may donate and accept electrons from MS during bond formation, and thus can protect MS in NaCl. Based on total investigation, a mechanism of corrosion inhibition is also proposed.
2021 Smart Technologies, Communication and Robotics (STCR), 2021
In order to avoid regulatory violations, downtime, or fatal disasters, industrial assets must be ... more In order to avoid regulatory violations, downtime, or fatal disasters, industrial assets must be maintained in a timely manner. One of the biggest factors for timely maintenance is corrosion of the assets. Corrosion causes generation of irregular surfaces that look bad in appearance and can produce serious problems. To avoid corrosion problems, timely maintenance must be scheduled well in advance. For this, images based corrosion detection can be a useful tool with respect to real time corrosion tests. In this work, images based corrosion detection is performed using Deep-learning UNET-8layer architecture. More than 400 images of corrosion data with their binary ground truth labels are trained to analyze and classify the corroded region in the images. After training, the model is tested and it is found that the prediction over corroded part of original image data can be done with the model with binary accuracy of 95.28% and validation binary accuracy of 96.87%.
Abstract Corrosion of low carbon steels is a big constraint in their smooth use for engineering a... more Abstract Corrosion of low carbon steels is a big constraint in their smooth use for engineering applications. Corrosion not only destroys their designed properties but also harms their physical appearance. Several researchers are working to minimize the effect of corrosion on low carbon steel. In this regard, they have consumed a lot of synthetic and natural materials till date. Nowadays, researchers are showing their trust on natural materials for corrosion inhibition application due to their easy availability, negligible toxicity and easy synthesis process as well as eco-friendly nature. It is an established fact that waste natural materials (WNMs) like banana peels have very high potential for being used in corrosion inhibition application due to their bioactive contents. However, WNMs have not been explored frequently by the researches despite their supreme technical and economical importance in corrosion inhibition. In this work, ethanol extract of waste potato peels is used for corrosion inhibition of low carbon steel in 0.5 M NaCl. The inhibition properties of the extract are determined by weight loss measurements, open circuit potential (OCP) curves, electrochemical impedance spectroscopy (EIS), Tafel polarization curves and linear polarization resistance (LPR) techniques. Results show that maximum corrosion inhibition efficiency of 70% has been achieved using 1000 mg L−1 of the extract. Scanning electron microscopy (SEM) and energy dispersive X-RD Spectroscopy (EDX) has also shown that the extract has successfully protected low carbon steel in 0.5 NaCl.
Abstract Corrosion of metals is a serious problem for the economy and human lives of any country.... more Abstract Corrosion of metals is a serious problem for the economy and human lives of any country. Several researchers have been working to minimize the loss of corrosion damage. Green corrosion inhibitors (GCI) are a simple solution of the corrosion problem since GCI is non– toxic, efficient in corrosion inhibition, biodegradable and available at low cost. In this regard waste natural materials (WNM) have attracted a great attention of the scientists since their use as corrosion inhibitors is economic, safe and eco-friendly (recycling of the waste). In this work, Solanum melongena steam (brinjal cap) aqueous extract (SMSAE) is used for corrosion inhibition of low carbon steel (LCS) in 1 M NaCl. The extract is characterized by Uv–visible and FTIR spectroscopy, which suggest that the extract is electrochemical active. The corrosion inhibition properties of the extract was determined by weight loss measurements, electrochemical impedance spectroscopy (EIS), open circuit potential (OCP) curves and Tafel polarization curves (TPC). The results show that the extract is giving inhibition efficiency > 70% at 500 mg L-1 of the extract. Surface and compositional analysis was performed by Scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy, which evidently illustrate that the extract is successfully inhibiting corrosion of mild steel in 1 M NaCl. It can be said based on results that SMSAE (WNM) is providing good inhibition efficiency and can be used in different applications.
Copper is one of the most demanded commercial metal/alloys in world market. The demand for copper... more Copper is one of the most demanded commercial metal/alloys in world market. The demand for copper in industries such as electrical, electronics, automobile, telecommunications, defence, etc. as well as in daily life has escalated in the recent years due to its versatile physical and chemical properties. However destruction of copper surface by any means, preferably corrosion, can limit its vast application. For protection from corrosion, various techniques are used to coat metal substrates with passivating materials. These techniques are either complex as well as expensive, or provide incomplete protection in acid media. To address these issues, floating film transfer method (FFTM) is utilized in this work for obtaining ultrathin film of squaraine (passivating molecule) as well as their easy and fast transfer over copper substrate. The squaraine film is deposited on copper substrate in layers, viz., 1 to 4 layers. The corrosion behavior is examined in 0.1 M HCl using electrochemical...
Abstract Donor-π-Acceptor (D-π-A) type compounds are very interesting for corrosion study since t... more Abstract Donor-π-Acceptor (D-π-A) type compounds are very interesting for corrosion study since they have unique structural configuration. Their high chemical reactivity promotes an easy bonding with the metals, which helps in corrosion inhibition. In this work, ethyl-2-cyano-3-(4-(dimethylamino) phenyl) acrylate (ECDPA) (a D-π-A type compound) is used to restrict the copper loss in 1 M HCl. The impedance analysis portrays that ECDPA saves 75% of copper at its maximum concentration in HCl solution. To further increase the inhibition efficiency, ECDPA-ZnO composites are developed. The ZnO is synthesized hydrothermally and calcined at two different temperatures (300 °C and 500 °C). The morphology of synthesized ZnO changes drastically with calcination; however, the main morphological difference in ZnO at 300 °C (Z3) and ZnO at 500 °C (Z5) is increment of porosity. Hence, two composites are made to analyze the change in corrosion behavior of the composites. The composites are designated as: ECDPA-ZnO at 300 °C to EZ3 and ECDPA-ZnO at 500 °C to EZ5. The characterizations of ZnO, ECDPA and ECDPA-ZnO composites have been performed by UV–visible spectroscopy, FTIR spectroscopy, HRTEM, HRSEM, EDAX and XRD techniques. The corrosion inhibition efficiencies of EZ3 and EZ5 are achieved as 78% and 81%. This fact suggests that ZnO increases the adsorption of ECDPA over copper surface, which is confirmed by Langmuir adsorption analysis and electrochemical atomic force microscopy (EC-AFM) measurements.
Abstract Prunus dulcis (almond) is one of the most commonly ingested dry fruits by peoples in the... more Abstract Prunus dulcis (almond) is one of the most commonly ingested dry fruits by peoples in their routine diet plan due to its high nutrition content. However, almond peels are not eaten and thrown as a waste material. The reason is that the peels are not easily digested in human body due to its low solubility in aqueous medium. Also, the peels contain low amount of cyanides. Surprisingly, almond peels also contain various active bio-compounds which have not been explored properly for any industrial purpose. With the idea of utilizing a waste material and checking solution dependability, the aqueous and methanolic extracts of almond peels have been prepared and investigated by experimental techniques and theoretical tools. The protection efficiency of the extracts in reduction of mild steel (MS) dissolution in 0.1 M HCl has been determined by electrochemical methods (impedance analysis and polarization behavior). The results shows that methanolic and aqueous extracts avert 93% and 85% mild steel loss respectively, which portray that methanolic extract is more effective than aqueous extract. This fact is supported by the surface analysis of mild steel samples done by HRSEM and AFM. UV–vis and FTIR spectroscopy analysis reveals the reason that methanol can extract more phytochemcial constituents of almond peels than water. The free energies of adsorption (ΔG°) for both extract's molecules have been determined based on adsorption coefficient (Kads) obtained from Langmuir isotherm fitting of inhibition data, which suggest that adsorption is neither pure physical nor pure chemical, i.e., mixed type. DFT modeling and Monte carlo simulation techniques are also explored to investigate theoretical adsorption and inhibition characteristics of the molecules, which supports the interpretation of the experimental results.
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