Integration of green nanotechnology with silica for corrosion inhibition

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sharayu Govardhane ◽  
Pravin Shende
Keyword(s):  
Corrosion Inhibition ◽  
Metal Surface ◽  
Metallic Nanostructures ◽  
Green Technology ◽  
Synthetic Method ◽  
Silica Nanocomposites ◽  
Chemical Agents ◽  
Nanoparticles Synthesis ◽  
Carcinogenic Effects ◽  
Effective Penetration

Abstract Silica is a chemically inert molecule with an ability of adsorption on the metal to form a layer of barrier for preventing it from the atmospheric damage. However, a larger amount of silica is required for producing the impactful anticorrosive activity, leading to toxic and carcinogenic effects in the environment, and thus limiting the applications of silica. Application of nanotechnology in the synthesis of silica nanocomposites provides, for example, the advantages of better biocompatibility, systemic stability, ineffective response towards pH changes large multifunctionality. However, uses of harmful solvent, low penetration and toxicity, remain the major concerns for silica nanoparticles. Synthesis of silica nanocomposites with green technology will be an attractive approach to offer reduction in toxicity associated with the silica, higher surface area, effective penetration, easy spreadability, better adsorption over the metal surface and also provided the controlled release of chemical agents on contact with metal surface. The present article enlightens the use of green syntheses in the formulation of silica nanocomposites for corrosion inhibition in comparison to conventional synthetic method and provides the insights of various green nanocarriers such as nanocontainers, sol-to-gel nanoparticles, metallic nanostructures and silica nanocomposites for enhancing the proficiency of corrosion inhibition.

THEORETICAL AND EXPERIMENTAL STUDIES OF CORROSION INHIBITION OF THIOHENE-2-ETHYLAMINE ON MILD STEEL IN ACID MEDIA

2015 ◽  
Vol 76 (13) ◽  
Author(s):  
Bishir Usman ◽  
Hasmerya Maarof ◽  
Hassan H. Abdallah ◽  
Rosmahida Jamaludin ◽  
Mohamed Noor Hasan ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Metal Surface ◽  
Electrochemical Impedance ◽  
Experimental Studies ◽  
Qsar Model ◽  
Acid Media ◽  
Structure Activity ◽  
C And N ◽  
Quantitative Structure Activity Relation

Corrosion inhibition of mild steel in 0.5M H2SO4 at 30oC with thiophene-2- ethylamine (TEA) as inhibitor has been assess by quantitative structure activity relation (QSAR) model and quantum chemical calculations. The results were evaluated using weight loss and electrochemical methods such as potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). The results showed good performance of TEA in corrosion protection which behaves as mixed inhibitor from PDP. The micrograph from FESEM and EDX dot mapping showed that the inhibitor adsorbed onto the metal surface with different distribution for S, C and N atoms which indicate less damage on the metal surface in the presence of TEA.

scholarly journals Synergistic Effect of Thiourea-Zn2+ and L-Phenylalanine on the Inhibition of Corrosion of Mild Steel in Acid Medium

2019 ◽  
Vol 7 (2) ◽  
pp. 72-77
Author(s):  
M.B. Geetha ◽  
◽  
J. Sathish ◽  
S. Rajendran ◽  
◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Mild Steel ◽  
Acid Medium ◽  
Corrosion Inhibition ◽  
Metal Surface ◽  
Inhibition Efficiency ◽  
Protective Film ◽  
Surface Smoothness ◽  
Polarization Study ◽  
Corrosion Inhibition Efficiency

The formulation consisting of 100 ppm Thiourea, 25 ppm Zn2+ and 250 ppm of L-Phenylalanine has 95% corrosion inhibition efficiency with a synergistic effect among Thiourea, L-Phenylalanine and Zn2+ ions. Polarization study shows that this formulation as a mixed inhibitor. FTIR spectra exposed the presence of Fe2+-Thiourea, Fe2+-L-Phenylalanine complex and Zn(OH)2 in protective film. AFM study confirmed the metal surface smoothness following engrossed in the inhibitor and the presence of formed protective film on the metal surface.

Corrosion Inhibition by Flower Extracts - At a Glance

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Rajendran Susai ◽  
A Suriya Prabha ◽  
Vijaya N ◽  
Umasankareswari T ◽  
Krishnaveni A ◽  
...  
Keyword(s):  
Corrosion Inhibition ◽  
Metal Surface ◽  
Adsorption Isotherms ◽  
Corrosion Inhibitors ◽  
Protective Film ◽  
Impedance Spectra ◽  
Flower Extract ◽  
Polar Groups ◽  
Ac Impedance Spectra ◽  
Control Corrosion

Flower extract are ecofriendly corrosion inhibitors. They have been used to control corrosion of mild steel, copper and aluminium in various media. The mechanistic aspects have been investigated by electrochemical studies such as polarisaiton study and AC impedance spectra. The protective film has been analysed by FTIR, SEM, EDX and AFM. The adsorption isotherms isotherms being obeyed are Langmuir, Temkin and Freundlich adsorption isotherms. The flowers extract primarily function as mixed type of inhibitors. The active principles mainly present in colored flowers are anthocyanins, and carotenoids. They contain polar groups such as hydroxyl, methoxy and ether. These ingredients coordinate with the metal ions on the metal surface through oxygen atom, benzene ring and conjugated double bonds. The protective film formed on the metal surface controls the corrosion process. Keywords: Corrosion Inhibition; Flower Extract; AFM; SEM; FTIR; Isotherms; Green Inhibitors

scholarly journals Corrosion Resistance of Aluminum against Acid Activation: Impact of Benzothiazole-Substituted Gallium Phthalocyanine

Molecules ◽  
2019 ◽  
Vol 24 (1) ◽  
pp. 207 ◽  
Author(s):  
Nnaemeka Nnaji ◽  
Njemuwa Nwaji ◽  
John Mack ◽  
Tebello Nyokong
Keyword(s):  
Corrosion Inhibition ◽  
Metal Surface ◽  
Open Circuit ◽  
Computational Techniques ◽  
Acid Activation ◽  
Acid Attack ◽  
Aluminum Corrosion ◽  
Organic Inhibitors ◽  
Inhibition Performance ◽  
Experimental Findings

This study describes the adsorption behavior of organic inhibitors at the aluminum-HCl solution interface and their corrosion inhibition performance. The organic inhibitors employed are: 4-(benzo [d]thiazol-2ylthio)phthalonitrile (BTThio) and tetrakis[(benzo[d]thiazol-2-yl-thio)phthalo- cyaninato]gallium(III) chloride (ClGaBTThioPc). The corrosion behavior of these inhibitors is investigated using electrochemical and computational techniques. Open circuit potential results reveal predominant cathodic character for the mechanism of aluminum corrosion inhibition by the inhibitors. Inhibition efficiency values from potentiodynamic polarization measurements increase from 46.9 to 70.8% for BTThio and 59.7 to 81.0% for ClGaBTThioPc within the concentration range of 2 to 10 μM. Scanning electron microscopy (SEM) measurements reveal protection of the metal surface from acid attack, in the presence of the inhibitors and energy dispersive X-ray (EDX) measurements show that the most probable way by which the inhibitors protect the metal surface would be by shielding it from the corrosion attacks of Cl− from the acid. Quantum chemical parameters corroborate well with experimental findings.

scholarly journals CORROSION INHIBITION PERFORMANCE OF ACACIA NOLITICA POD EXTRACT ON ALUMINIUM ALLOY IN 1M ALKALINE SOLUTION

2020 ◽  
Vol 4 (3) ◽  
pp. 154-161
Author(s):  
Anthony Victor Gambo
Keyword(s):  
Aluminium Alloy ◽  
Corrosion Inhibition ◽  
Metal Surface ◽  
Inhibition Efficiency ◽  
Open Circuit ◽  
Protective Film ◽  
Inhibitor Molecule ◽  
Langmuir Adsorption ◽  
Increase With Increase ◽  
Inhibition Performance

The effect of extract of Acacia Nolitica pod on the corrosion inhibition of LM 6 aluminium alloy in 1M NaOH was studied using weight loss, gasometric, and open circuit potential techniques. Corrosion rates were found to reduce in the presence of the inhibitor. The inhibition efficiency was found to increase with increase in the concentration of the inhibitor and decreased with increase in the temperature. Thermodynamic parameters showed that the adsorption of the inhibitor on the metal surface is a spontaneous process and that the adsorption was via a physisorption mechanism. The adsorption process fitted perfectly with the Langmuir adsorption isotherm indicating that the extract was strongly adsorbed on the aluminium alloy surface. Morphology of the surface was examined by scanning electron microscopy (SEM) in the absence and presence of 0.5%v/v of the used inhibitor which confirmed the existence of a protective film of inhibitor molecule on the metal surface.  

scholarly journals Binary Mixtures of Nonyl Phenol with Alkyl Substituted Anilines as Corrosion Inhibitors for Mild Steel in Acidic Medium

2012 ◽  
Vol 9 (1) ◽  
pp. 149-160 ◽  
Author(s):  
H. S. Shukla ◽  
N. Haldar ◽  
G. Udaybhanu
Keyword(s):  
Mild Steel ◽  
Binary Mixtures ◽  
Corrosion Inhibition ◽  
Metal Surface ◽  
Potentiodynamic Polarization ◽  
Electrochemical Impedance ◽  
Adsorption Model ◽  
Nonyl Phenol ◽  
Substituted Anilines ◽  
Inhibitor Molecule

The present study deals with the evaluation of the corrosion inhibition effectiveness of the two binary mixtures of nonyl phenol (NPH) with 2, 4 dimethyl aniline (DMA) and 2 ethyl aniline (EA) at different concentration ratios (from 1:7 to 7:1) for mild steel in H2SO4(pH=1) solution by weight loss and potentiodynamic polarization method. Corrosion inhibition ability of the compounds has been tested at different exposure periods (6 h to 24 h) and at different temperatures (303 K to 333 K). The binary mixture of NPH and EA (at 7:1 concentration ratio) has afforded maximum inhibition (IE% 93.5%) at 6 h exposure period and at room temperature. The adsorption of both the inhibitors is found to accord with Temkin adsorption isotherm. Potentiodynamic polarization study reveals that the tested inhibitors are mixed type inhibitor and preferentially act on cathodic areas. Electrochemical impedance study suggests formation of an inhibition layer by the adsorption of the inhibitors on the metal surface. An adsorption model of the inhibitor molecules on the metal surface has been proposed after immersion test in the inhibited acid showed characteristic shift of N-H and O-H bond frequencies towards lower side compared to that of the respective pure samples which indicated the donation of electron pair through N and O atom of the inhibitor molecule in the surface adsorption phenomena. SEM study has revealed formation of semi globular inhibitor products on the metal surface. The comparisons of the protection efficiencies of these compounds according to their relative electron density on the adsorption centre and projected molecular area of the inhibitor molecules have been made.

Corrosion inhibition studies of cigarette waste on the iron surface in acid medium: electrochemical and surface morphology analysis

2016 ◽  
Vol 63 (4) ◽  
pp. 245-255 ◽  
Author(s):  
Luis Manuel Becerra Lucatero ◽  
David Turcio Ortega ◽  
Thangarasu Pandiyan ◽  
Narinder Singh ◽  
Harpreet Singh ◽  
...  
Keyword(s):  
Acid Medium ◽  
Corrosion Inhibition ◽  
Metal Surface ◽  
Corrosive Medium ◽  
Electrochemical Impedance ◽  
Polarization Curves ◽  
Iron Surface ◽  
Metal Corrosion ◽  
Content Type ◽  
Scanning Electron

Purpose The purpose of this paper is to study the corrosion inhibition tendency of cigarette waste (water extracts of cigarette butts, WECB) on an iron surface in an acid medium. Design/methodology/approach The electrochemical impedance spectroscopy and polarization techniques were used to analyze the performance of WECB on the iron working electrode. Electrochemical polarization curves were used to determine the intensity of the metal corrosion, specifically to see the effectiveness of the anodic and cathodic reactions in the corrosive medium having WECB. Moreover, the electrochemical impedance of WECB with electrode was analyzed qualitatively. The electrochemical data that relate isotherm adsorption of WECB with iron were analyzed; furthermore, the scanning electron microscope was used to analyze morphology change during the corrosion inhibition. Findings After analyzing the impedance data, it is seen that there exists a single capacitive semicircle at the higher frequency range corresponding to a one-time constant in the Bode-phase plot. In the polarization curves studies (Tafel slopes), the current densities of both cathodic and anodic branches are greatly affected in the presence of WECB in the corrosive medium, suggesting that WECB performs as a mixed inhibitor. The free energy data and Temkin adsorption isotherm process show that the adsorption process of WECB on the metal surface follows a physisorption. Furthermore, the WECB-coated metal surface analyzed by scanning electron microscopy confirms the corrosion inhibition of WECB in the acid medium. Research limitations/implications An in-depth characterization of the corroded scales is recommended to endorse the results of this study. Social implications There may be some people who may challenge that the research may encourage smoking; however, if taken positively, the research offers a very cost-effective and eco-friendly solution to tackle the cigarette waste. Originality/value Idea of the present work is to reuse the WECB as corrosion inhibitors for the metal surface, as this waste contains large amount of nicotine, which exhibits corrosion inhibition properties. The present work deals with the study of corrosion inhibition properties of WECB on the iron surface in acid medium. The findings of this study can be very useful from scientific, as well as industrial application point of view. Moreover, the research is important as there is no proper recycling process for this waste so as to maintain a clean environment.

scholarly journals Moringa Oleifera Seed Oil as Green Corrosion Inhibitor for Ductile Cast Iron in Cassava Fluid

2020 ◽  
Vol 4 (2) ◽  
Keyword(s):  
Cast Iron ◽  
Corrosion Inhibition ◽  
Metal Surface ◽  
Moringa Oleifera ◽  
Seed Oil ◽  
Inhibition Efficiency ◽  
Ductile Cast Iron ◽  
Adsorption Studies ◽  
Increase With Increase ◽  
Moringa Oleifera Seed

Cassava fluid is acidic and corrodes the ductile cast iron parts from which many machineries used in processing cassava, a staple source of carbohydrates in most West African countries are made. The corrosion behavior of ductile cast iron cassava fluid with Moringa Oleifera seed oil as inhibitor was studied using 0, 0.2, 0.4, 0.6, and 0.8 %v/v concentrations and at two different temperatures of 40oC and 60oC by potentiodynamic polarization (Tafel) technique. Some thermodynamic, Corrosion inhibition and adsorption studies were also addressed. Moringa Oleifera seed oil extract was found to successfully inhibit the corrosion of cast iron in cassava fluid. Moringa Oleifera acted as a mixed type inhibitor. The corrosion inhibition efficiency was found to increase with increase in concentration of the extract but decrease with rise in temperature. The maximum inhibition efficiency of the extract on ductile cast iron corrosion was noted to be about 73%. Adsorption studies showed that Langmuir isotherm describes the manner in which the inhibitor was adsorbed on the metal surface. The adsorption process was found to be spontaneous as all the free energy of adsorption values calculated were negative and ranged from -3.43 kJ/mol to -1.34 kJ/mol, signifying a spontaneous physical adsorption on metal surface. The stereo-micrograph images of the metal surface after immersion in corrosive medium confirmed the protection offered by the Moringa Oleifera extract on the surface of the metal. It was further shown that the corrosion rate was influenced by the combined interactions of temperature of operation and concentration of the inhibitor.

Theoretical evaluation of corrosion inhibition performance of six thiadiazole derivatives

2020 ◽  
Vol 19 (02) ◽  
pp. 2050010
Author(s):  
Hongfu Mi ◽  
Wenhe Wang ◽  
Yaling Liu ◽  
Taiyang Wang
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Molecular Mechanics ◽  
Corrosion Inhibition ◽  
Metal Surface ◽  
Alkyl Chain ◽  
Dynamics Simulation ◽  
Inhibition Mechanism ◽  
Theoretical Evaluation ◽  
Surface Corrosion

Corrosion inhibition mechanism of six 2-amino-5-alkyl-1,3,4-thiadiazole compounds, for metal surface corrosion was studied by combining quantum chemistry, molecular mechanics and molecular dynamics simulation methods. Molecular reactivity parameters such as [Formula: see text], [Formula: see text], Fukui index were obtained and revealed that the change in alkyl chain length has little influence on the reactivity of thiadiazole inhibitor molecules. Molecular mechanics calculation results show that the molecule with elongated alkyl chain could form self-assembled membrane with higher stability and coverage rate to prevent the diffusion of corrosive substances to metal surface. Molecular dynamics simulation revealed the -equilibrium adsorption behavior of these thiadiazole molecules on metal surface and the calculated results were in agreement with the experimentally determined inhibition efficiencies.

scholarly journals Natural Corrosion Inhibition and Adsorption Characteristics of Tribulus terrestris Plant Extract on Aluminium in Hydrochloric Acid Environment

2021 ◽  
Vol 12 (2) ◽  
pp. 2603-2617
Keyword(s):  
Corrosion Inhibition ◽  
Metal Surface ◽  
Plant Extract ◽  
Inhibition Efficiency ◽  
Protective Layer ◽  
Tribulus Terrestris ◽  
Protective Film ◽  
Electrochemical Studies ◽  
Acid Environment ◽  
Natural Corrosion

Corrosion inhibitive and adsorption capabilities of Tribulus terrestris plant extract on aluminum in 1.0 N HCl solution was evaluated by mass loss and electrochemical methods. The inhibition efficiency increased with increasing extract concentration, whereas it decreased with increasing immersion time. The adsorption of the extract on the metal surface was physisorption, supported by ΔGads values( around -20 kJ mol−1) and obeyed by Langmuir, Temkin and Freundlich adsorption isotherms. Electrochemical studies revealed mechanistic aspects of corrosion inhibition like Potentiodynamic polarization measurements indicated the nature of inhibitor is a mixed type and impedance studies supported the formation of a protective layer of inhibitor on a metal surface. SEM micrograms were also applied to study surface morphology. These images confirmed the creation of a protective film over the metal surface.

Sign in / Sign up

Export Citation Format

Share Document