Corrosion inhibition of Monel 400 in hydrochloric solution by some green leaves

2017 ◽  
Vol 64 (3) ◽  
pp. 347-354 ◽  
Author(s):  
Sihem Kherraf ◽  
Emna Zouaoui ◽  
Mohamed Salah Medjram
Keyword(s):  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Ricinus Communis ◽  
Effect Of Temperature ◽  
Content Type ◽  
Green Leaves ◽  
Ricinus Communis L ◽  
Methanol Solutions ◽  
Monel 400 ◽  
Inhibitive Action

Purpose The purpose of this study was to investigate the inhibitive action of some green leaves on Monel 400 alloy in acidic media. Design/methodology/approach Green leaves of Mespilus japonica, Ricinus communis L and Vitis vinifera were immersed in methanol solutions, separately, and filtrated after 48 h of immersion; the obtained filtrates were examined as corrosion inhibitors of Monel 400 alloy in hydrochloric acid solution (1.0M HCl). The performance of these inhibitors was evaluated using electrochemical impedance spectroscopy and potentiodynamic polarization. The effect of temperature on corrosion behavior of Monel 400 was also studied. Findings The results obtained showed that all tested inhibitors performed as good corrosion inhibitors. The inhibition process is attributed to the adsorption of the inhibitors on Monel surface. The adsorption behavior was found to follow Langmiur isotherm. The inhibition efficiencies of extracts increased with increasing the concentration of each inhibitor and deceased with increasing the temperature. Practical implication These inhibitors could have application in industries where hydrochloric solutions were used to remove the surface impurities of Monel 400. Originality/value This paper helps to find new corrosion inhibitors that are safe and eco-friendly.

Corrosion inhibition of some azole derivatives on carbon steel in hydrochloric acid solution

2014 ◽  
Vol 61 (5) ◽  
pp. 300-306 ◽  
Author(s):  
B.P. Markhali ◽  
R. Naderi ◽  
M. Sayebani ◽  
M. Mahdavian
Keyword(s):  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Organic Compounds ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Acid Corrosion ◽  
Molecular Structures ◽  
Inhibition Mechanism ◽  
Content Type

Purpose – The purpose of this paper is investigate the inhibition efficiency of three similar bi-cyclic organic compounds, namely, benzimidazole (BI), benzotriazole (BTAH) and benzothiazole (BTH) on carbon steel in 1 M hydrochloric acid (HCl) solution. Organic inhibitors are widely used to protect metals in acidic media. Among abundant suggestions for acid corrosion inhibitors, azole compounds have gained attention. Design/methodology/approach – The inhibition efficiency of the three organic compounds was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Findings – Superiorities of BTH and BTAH corrosion inhibitors were shown by EIS data and polarization curves. Moreover, the results revealed that BTAH and BTH can function as effective mixed-type adsorptive inhibitors, whereas no inhibition behavior was observed for BI. Both BTAH and BTH obeyed Longmuir adsorption isotherm. The results obtained from this isotherm showed that both inhibitors adsorbed on the specimen surface physically and chemically. The difference in inhibition efficiencies of BTAH, BTH and BI was related to the presence of nitrogen and sulfur hetero atoms on their molecular structures. Originality/value – This study evaluated inhibition efficiency of BI, BTAH and BTH using electrochemical methods. In addition, the study attempted to find inhibition mechanism of the inhibitors and to find modes of adsorption of the inhibitors, correlating effects of heteroatoms and inhibition efficiency.

Corrosion inhibition of stainless steel in sulfuric acid solution containing sulfide ions

2019 ◽  
Vol 66 (3) ◽  
pp. 360-368 ◽  
Author(s):  
Abou-Elhagag A. Hermas ◽  
Abobakr Mohamed Elnady ◽  
Reham M. Ali
Keyword(s):  
Stainless Steel ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Adsorbed Layer ◽  
Content Type ◽  
Positive Side ◽  
Efficiency Increase ◽  
Weight Loss Method ◽  
Loss Method ◽  
Sulfide Ions

Purpose Although stainless steel (SS) has good corrosion resistance in most aqueous solutions, it suffers corrosion in some solutions which contain aggressive ions such as sulfide ions. This study aims to use some cephalosporins (cefotaxime, cephapirin and cefazolin) as corrosion inhibitors of commercial SS in 0.5 M H2SO4 solution containing sulfide ions at 30°C. Design/methodology/approach The study was carried out using weight loss method, potential-time, linear polarization, potentiodynamic polarization, electrochemical impedance measurements, scanning electron microscopy, Fourier transform infrared and energy dispersive X-ray analysis. Findings The presence of the cephalosporin compound in the corrosive medium shifted the corrosion potential of SS to much positive side, which enhances self-passivation of SS, and the shifting increased with increasing inhibitor concentration. The cephalosporin compounds worked as effective inhibitors with mainly anodic and the efficiency increase as cefotaxime < cephapirin < cefazolin. The inhibitors form a protective adsorbed layer, which enriches the surface content of Ni and Cr and thus assists the SS to be passive. Originality/value The antibiotics cephalosporins could be used as effective corrosion inhibitors for SS in acidic solutions containing sulfide ions. The inhibitors enhances the the passive oxide film of SS even in presence of aggressive ions such as sulfide ions.

Effect of temperature and pressure on mechanical, surface and electrochemical properties of Al-1.5Cu-5.5Zn-2.5Mg (Alumix-431)

2018 ◽  
Vol 65 (6) ◽  
pp. 558-571 ◽  
Author(s):  
Ayşe Nur Acar ◽  
Rasiha Nefise Mutlu ◽  
Abdul Kadir Ekşi ◽  
Ahmet Ekicibil ◽  
Birgül Yazıcı
Keyword(s):  
Electrochemical Properties ◽  
Surface Characterization ◽  
Electrochemical Impedance ◽  
Effect Of Temperature ◽  
Corrosion Properties ◽  
Content Type ◽  
X Ray ◽  
Good Surface ◽  
Mechanical Properties And Corrosion ◽  
Mechanical Surface

Purpose The purpose of this paper is to examine new alloys created from Alumix 431 powder and investigate their mechanical and electrochemical properties. Design/methodology/approach In this study; Alumix-431 alloy samples were prepared using the powder metallurgy (P/M) method applying cold (RT) and warm (50°C and 80°C) compaction methods under pressures of 200 and 250 MPa and were sintered at 600°C in N2(g) atmosphere. Hardness and density of the samples were measured, and corrosion properties were determined by electrochemical impedance spectroscopy charting polarization curves. Surface characterization was determined by contact angle, scanning electron microscopy/mapping, energy dispersive X-ray spectrometry and X-ray diffractometry images. Findings Alumix-431 alloys obtained upon compaction at 250 MPa/50 °C had the highest mechanical properties and corrosion resistance and good surface properties. On the surfaces of Alumix-431 alloys, α-Al, MgZn2, Al2,CuMg, Al2,O3, Al2MgO4 phases were recorded. Originality/value This study aimed to construct a correlation between mechanical and electrochemical properties of the newly created alloys (prepared under special conditions).

New 1-(2-pyridinyl)-2-(o-, m-, p-hydroxyphenyl) benzimidazoles as corrosion inhibitors for API 5L X52 steel in acid media

2018 ◽  
Vol 65 (2) ◽  
pp. 166-175 ◽  
Author(s):  
Edelmira Rodriguez-Clemente ◽  
Victoria Barrera-Pascual ◽  
Humberto Cervantes-Cuevas ◽  
Jorge Aldana-González ◽  
Jorge Uruchurtu-Chavarin ◽  
...  
Keyword(s):  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Petroleum Industry ◽  
Acid Media ◽  
Content Type ◽  
Impedance Spectroscopy Technique ◽  
X52 Steel ◽  
First Time ◽  
Practical Implications ◽  
Corrosion System

Purpose This paper aims to evaluate the corrosion inhibition capacities of synthesized compounds 1-(2-pyridinyl)-2-(o, m-, p-hydroxyphenyl) benzimidazoles in API 5L X52 steel/HCl 1M corrosion system. Design/methodology/approach Electrochemical impedance spectroscopy technique was used. Findings The studies determined that under stagnant conditions, the durability and efficiency were maintained over 80 per cent for up to 500 h of immersion, while the residence time started to decrease after 150 h at the best inhibitor concentration (150 ppm). Practical implications This work may help to attenuate corrosion problems in the petroleum industry. Originality/value It is the first time that 1-(2-pyridiniy)-2-(o-, m-, p-hydroxyphenyl) benzimidazoles were evaluated as corrosion inhibitors.

Comparative study of 1,2,3-triazole derivatives as corrosion inhibitors of mild steel in sulphuric acid solution

2019 ◽  
Vol 66 (5) ◽  
pp. 544-555 ◽  
Author(s):  
Ilham Elazhary ◽  
My Rachid Laamari ◽  
Aziz Boutouil ◽  
Lahoucine Bahsis ◽  
Mohammadine El Haddad ◽  
...  
Keyword(s):  
Mild Steel ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Sulphuric Acid Solution ◽  
Frontier Molecular Orbital ◽  
Effect Of Temperature ◽  
Orbital Theory ◽  
Content Type ◽  
Mild Steel Corrosion ◽  
The Difference

Purpose This paper aims to study the corrosion inhibition of Methyl 2-(benzamido)-2-(4-phenyl-1H-1,2,3-triazol-1-yl) acetate (MBPTA) and Methyl 2-(benzamido)-2-(4-p-tolyl-1H-1,2,3-triazol-1-yl) acetate (MBTTA) in 1 M H2SO4 solution at 25 °C. Design/methodology/approach The authors have used weight loss measurements, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, FT-IR, quantum chemical calculations and scanning electron microscopy (SEM) techniques. Findings The polarization measurements indicate that both compounds are mixed type inhibitors, and that MBTTA is more effective than MBPTA. The effect of temperature on the corrosion behavior using optimal concentration of MBTTA and MBPTA was studied in the temperature range 298-328 K. SEM was used to examine the morphology of the metal surface. Thermodynamic parameters were calculated and discussed. Monte Carlo simulations were applied to lookup for the most stalls configuration and adsorption energy for the interaction of inhibitors on Fe (1 1 1) interface. The difference in inhibition efficiencies between the two organic inhibitors can be clearly explained in terms of frontier molecular orbital theory. Originality/value The authors report on the comparative inhibiting effect of two new 1,4-disubstituted 1,2,3-triazoles, namely Methyl 2-(benzamido)-2-(4-phenyl-1H-1,2,3-triazol-1-yl) acetate (MBPTA) and Methyl 2-(benzamido)-2-(4-p-tolyl-1H-1, 2, 3-triazol-1-yl) acetate (MBTTA) on mild steel corrosion in 1 M H2SO4 solution.

Study of corrosion of copper in industrial cooling systems

2015 ◽  
Vol 6 (5) ◽  
pp. 617-635 ◽  
Author(s):  
Ioannis A Kartsonakis ◽  
Elias P. Koumoulos ◽  
Antonis Karantonis ◽  
Costas A. Charitidis ◽  
S Dessypris ◽  
...  
Keyword(s):  
Design Methodology ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Water Cooling ◽  
Optimum Structure ◽  
Copper Corrosion ◽  
Cooling Systems ◽  
Content Type ◽  
Industrial Systems

Purpose – The purpose of this paper is to perform the evaluation of copper susceptibility to corrosion in industrial cooling systems. Microstructure and defects of copper are observed, while divergences from optimum structure are discussed. Design/methodology/approach – Various types of corrosion are examined. Electrochemical techniques such as electrochemical impedance spectroscopy and potentiodynamic polarisation are applied in these materials, using corrosion inhibitors. Microscopic observations and electrochemical measurements are interpreted according to possible mechanistic scenarios. Findings – It is evident that, under specific conditions (e.g. high pH), water cooling ingredients can enhance corrosion, leading to significant copper mass loss from the inner surface of the pipe and thus leading to failure. Originality/value – Evaluation of copper corrosion in cooling industrial systems was done, as well as studies of copper corrosion in sodium chloride.

Effect of temperature on process and kinetic parameters of the hydrogen evolution reaction of X80 under CP

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shixiong Wu ◽  
Zhiming Gao ◽  
Da-Hai Xia ◽  
Meijun Wu ◽  
Yingjie Liu ◽  
...  
Keyword(s):  
Kinetic Parameters ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Cathodic Protection ◽  
Electrochemical Impedance ◽  
Hydrogen Permeation ◽  
Impedance Spectrum ◽  
Effect Of Temperature ◽  
Electrochemical Impedance Spectrum ◽  
Content Type

Purpose This paper aims to study the effect of temperature on the process and kinetic parameters of the hydrogen evolution reaction of X80 under cathodic protection (CP) in 3.5% NaCl solution. Design/methodology/approach Potentiodynamic polarization combined with the hydrogen permeation test is used to analyze the hydrogen evolution reaction (HER) process and the rate-determining step for which is diagnosed through the electrochemical impedance spectrum method. Then, the influence of temperature on kinetic parameters of HER can be known from the results obtained by using the Iver-Pickering-Zamenzadeh model for data analysis. Findings The results show that the HER proceeds through Volmer–Tafel route with the Volmer reaction acting as the rate-controlling step; Increasing temperature gives a higher activity of the HER on X80, it also accelerates the hydrogen desorption and diffusion of hydrogen into the metal. Originality/value There exist few studies on the topic of how temperature affects the HER process. It is imperative to conduct a relevant study to give some instruction in cathodic protection system design and this paper fulfills this need.

scholarly journals New Cyanoacetamide Derivatives as Corrosion Inhibitors for Carbon Steel in Acidic Media

2008 ◽  
Vol 4 (1) ◽  
pp. 323-350 ◽  
Author(s):  
Abdel Aziz Fouda ◽  
A. M. El-desoky ◽  
M. M. Muhtar
Keyword(s):  
Carbon Steel ◽  
Benzoic Acid ◽  
Adsorption Mechanism ◽  
Electrochemical Impedance ◽  
Physical Adsorption ◽  
Effect Of Temperature ◽  
Active Centers ◽  
Carbon Steel Surface ◽  
Freundlich Adsorption Isotherm ◽  
Inhibitive Action

The corrosion behavior of carbon steel  in 1 M HCl solution in the absence and presence of 4-(2-Cyano-7- hydroxy-4-methylene-hepta-2,5-dienoylamino)-benzoic acid (a), 4-[2-Cyano-3-(4-methoxy -phenyl)-acryloylamino]-benzoicacid.(b), 4-(2-Cyano-3-phenyl acryloylamino)-benzoic acid (c) ,4-[3-(4-Chloro-phenyl)-2-cyano-acryloylamino]-benzoic acid(d), was investigated using weight loss , potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. The inhibitive action of the investigated compounds was discussed in terms of blocking the electrode surface by adsorption of the molecules through the active centers contained in their structures. The adsorption of these derivatives on carbon steel surface is consistent with Freundlich adsorption isotherm. The effect of temperature on the rate of corrosion in the absence and presence of these compounds were also studied. Physical adsorption mechanism is proposed from the calculated thermodynamic parameters for all investigated compounds.

Indole-3-carbaldehyde and 2-methylindole as corrosion inhibitors of mild steel during pickling

2015 ◽  
Vol 44 (5) ◽  
pp. 322-329 ◽  
Author(s):  
Shabnam Ashhari ◽  
Ali Asghar Sarabi
Keyword(s):  
Mild Steel ◽  
Quantum Chemical Calculations ◽  
Metal Surface ◽  
Quantum Chemical ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Contact Angles ◽  
Content Type ◽  
Hcl Solution

Purpose – This paper aims to investigate the corrosion inhibition effects of indole-3-carbaldehyde and 2-methylindole on mild steel in 1 M HCl solution. Design/methodology/approach – Indole-3-carbaldehyde and 2-methylindole as corrosion inhibitors of mild steel in 1 M HCl solution were investigated by polarisation and electrochemical impedance spectroscopy (EIS). Adsorption isotherm and mechanism were calculated. Quantum chemical calculations were used to find out a correlation between electronic structure of inhibitors and inhibition efficiency. Changes in the properties of metal surface in HCl solution in the presence of inhibitors were studied by contact angle measurements. Findings – Polarisation results revealed inhibitors could reduce cathodic and anodic reactions rates on metal surface. EIS analysis showed that inhibition efficiency of indoles increases by increasing the inhibitors’ concentration; maximum inhibition efficiency was 95 and 94 per cent in solutions containing 1 mM indole-3-carbaldehyde and 2-methylindole, respectively. Inhibitors’ adsorptions on metal surface were confirmed by analysing the exposed metals’ surface through contact angles measurements. The adsorption of inhibitors was found to follow Langmuir isotherm. Quantum chemical calculations showed that a more positively charged benzene ring in the structure of two indole-based inhibitors would lead to higher adsorption to metal. Originality/value – This research was carried out to understand the effects of two different functional groups (-C=O, -CH3) with different induction effects on the indole structure and on inhibition efficiency of corrosion inhibitors with the purpose of using these components in industrial application as acid wash solutions to etch and remove rusts from metal surfaces.

Effect of polyaniline/montmorillonite content on the corrosion protection of epoxy coating

2017 ◽  
Vol 64 (1) ◽  
pp. 75-82 ◽  
Author(s):  
Yingjun Zhang ◽  
Yawei Shao ◽  
Qiumei Shi ◽  
Yanqiu Wang ◽  
Guozhe Meng ◽  
...  
Keyword(s):  
Corrosion Protection ◽  
Design Methodology ◽  
Composite Powder ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Barrier Properties ◽  
Metal Substrate ◽  
Scanning Calorimetry ◽  
Content Type ◽  
Powder Content

Purpose The purpose of this paper was to research the influence of polyaniline/montmorillonite (PANI/OMMT) composite powder content on the corrosion protection of epoxy (EP) coating. Design/methodology/approach The polyaniline/montmorillonite/epoxy (PANI/OMMT/EP) coatings containing different contents of PANI/OMMT composite powder were prepared on steel. The corrosion protection performances of PANI/OMMT/EP coatings in 3.5 per cent NaCl solutions were investigated by electrochemical impedance spectroscopy. The barrier property of coatings was examined using water absorption analysis. The structure and crosslink density of coatings were examined using scanning electron microscopy and differential scanning calorimetry, respectively. Findings The PANI/OMMT composite powder could enhance the barrier properties of the EP coating and reduce the corrosion rate of the steel beneath the coating. The coating showed the best corrosion protection performance when 3 per cent PANI/OMMT powder was added to the coating. Originality/value The research clarified the influence of PANI/OMMT content on the corrosion protection of coating from two aspects: one is the barrier performance of the coating; the other is the corrosion inhibitors for metal substrate.

Sign in / Sign up

Export Citation Format

Share Document