The application of electrochemical impedance in the environmentally friendly scale and corrosion inhibitor polyepoxysuccinic acid

Corrosion control of metals is of technical, economical, environmental, and aesthetical importance. The use of inhibitors is one of the best options of protecting metals and alloys against corrosion globally. The environmental toxicity of organic corrosion inhibitors has prompted the search for green corrosion inhibitors which do not contain heavy metals or other toxic compounds. In addition to being environmentally friendly, plant products are inexpensive, readily available and renewable. With the growth of the green movement, it is important to prepare environmentally friendly anticorrosive paints to save lot of money, which are lost each year because of corrosion. This study utilized optical measurements, electrochemical impedance spectroscopy (EIS) analysis, scanning electron microscope (SEM) analysis, immersion test in artificial sea water and morphology observations of Arghel extract (AE) as Eco-friendly corrosion inhibitor incorporated in (styrene-acrylic) emulsion paint. In addition Physical, Chemical and Mechanical Properties of dry paint films of the paint test has been done in absence and presence of the corrosion inhibitor. We found that (styrene-acrylic) emulsion paint with 75ppm AE (SP2) has the best performance in protecting mild steel from corrosion.

Download Full-text

Experimental, DFT and MD Assessments of Bark Extract of Tamarix aphylla as Corrosion Inhibitor for Carbon Steel Used in Desalination Plants

Molecules ◽

10.3390/molecules26123679 ◽

2021 ◽

Vol 26 (12) ◽

pp. 3679

Author(s):

Ismat H. Ali

Keyword(s):

Corrosion Inhibitor ◽

Potentiodynamic Polarization ◽

Inhibition Efficiency ◽

Electrochemical Impedance ◽

Effect Of Temperature ◽

Bark Extract ◽

Plant Sample ◽

Gravimetric Analysis ◽

Sample Collection ◽

Eis Measurements

This study aimed to examine the extract of barks of Tamarix aphylla as a corrosion inhibitor. The methodology briefly includes plant sample collection, extraction of the corrosion inhibitor, gravimetric analysis, plotting potentiodynamic polarization plots, electrochemical impedance spectroscopic measurements, optimization of conditions, and preparation of the inhibitor products. The results show that the values of inhibition efficiency (IE%) increased as the concentrations of the inhibitor increased, with a maximum achievable inhibition efficiency of 85.0%. Potentiodynamic polarization (PP) tests revealed that the extract acts as a dual-type inhibitor. The results obtained from electrochemical impedance spectroscopy (EIS) measurements indicate an increase in polarisation resistance, confirming the inhibitive capacity of the tested inhibitor. The adsorption of the inhibitor on the steel surface follows the Langmuir adsorption isotherm model and involves competitive physio-sorption and chemisorption mechanisms. The EIS technique was utilized to investigate the effect of temperature on corrosion inhibition within the 298–328 K temperature range. Results confirm that the inhibition efficiency (IE%) of the inhibitor decreased slightly as the temperature increased. Lastly, the thermodynamic parameters for the inhibitor were calculated.

Download Full-text

Natural alkaloid as a non‐toxic, environmentally friendly corrosion inhibitor

The Canadian Journal of Chemical Engineering ◽

10.1002/cjce.24194 ◽

2021 ◽

Author(s):

Jun Hong Ng ◽

Tariq Almubarak ◽

Hisham Nasr‐El‐Din

Keyword(s):

Corrosion Inhibitor ◽

Environmentally Friendly ◽

Natural Alkaloid

Download Full-text

The inhibitive properties of Nopal slime on the corrosion of steel in chloride-contaminated mortar

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-05-2014-1381 ◽

2015 ◽

Vol 63 (1) ◽

pp. 65-71 ◽

Cited By ~ 4

Author(s):

Wilfrido Martinez-Molina ◽

Andres Torres-Acosta ◽

Rosalba Hernández-Leos ◽

Elia Alonso-Guzman ◽

Itzel Mendoza-Pérez ◽

...

Keyword(s):

Carbon Steel ◽

Corrosion Inhibitor ◽

Electrochemical Impedance ◽

Experimental Period ◽

Experimental Program ◽

Content Type ◽

Industry Applications ◽

Cactus Mucilage ◽

Electrochemical Monitoring ◽

Chloride Contaminated

Purpose – The purpose of this paper is to determine if a type of cactus mucilage, Opuntia ficus-indica (OFI), may act as a corrosion inhibitor for carbon steel in cement-based materials (mortar) exposed to chloride-laden environment. Design/methodology/approach – Mortar prisms, reinforced with carbon steel rods, were immersed in sodium chloride (NaCl) solution for five wet – dry cycles. The experimentation included electrochemical monitoring (corrosion potential, Ecorr, and polarization resistance, Rp) of carbon steel during the time of exposure until corrosion-induced cracking appeared at the mortar surface. Crack survey on the mortar prisms was performed. Carbon steel rods were retrieved from the mortar after crack survey and steel mass loss at the end of the experimental period was estimated. A comparison between the different mixtures was also performed. Findings – OFI mucilage did perform as a corrosion inhibitor of steel in chloride contaminated mortar. Research limitations/implications – The experimental program needs to be corroborated in concrete specimens with typical dimensions. The surface oxide/hydroxide formation of the carbon steel in contact with the OFI mucilage is still unknown; thus, electrochemical impedance spectroscopy (EIS) and X-ray diffraction (XRD) analyses are needed. Practical implications – OFI mucilage is a suitable natural product that can be used to increase durability of concrete structures not only in countries where OFI cactus is produced, but also in many other countries where this plant is considered a plague. Originality/value – The new information obtained from this paper is the innovative use of a by-product of this cactus plant for construction industry applications.

Download Full-text

Calcium D-Pantothenate as Green Corrosion Inhibitor on Mild Steel in 240 ppm NaCl Solution

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.b1181.1292s219 ◽

2019 ◽

Vol 9 (2S2) ◽

pp. 435-442

Keyword(s):

Mild Steel ◽

Corrosion Inhibitor ◽

Potentiodynamic Polarization ◽

Density Functional ◽

Electrochemical Impedance ◽

Corrosion Current ◽

Nacl Solution ◽

Functional Theory ◽

Vitamin B5 ◽

Quantum Chemical Data

Corrosion inhibition of mild steel in 240 ppm NaCl solution using Calcium D-Pantothenate (Vitamin B5 ) as corrosion inhibitor is studied using electrochemical impedance, potentiodynamic polarization and weight loss studies. From the potentiodynamic polarization studies, icorr (corrosion current density) decreases with increasing the concentration of vitamin B5 (VB5 ). The CR (corrosion rate) decreases and the IE (inhibition efficiency) of VB5 increases on increasing the concentration of VB5 .Surface investigation using SEM, EDX spectra, UV-Vis, FTIR, electrochemical impedance, potentiodynamic polarization and adsorption isotherm parameter of VB5 in 240 ppm NaCl solution shows that VB5 can act asworthy corrosion inhibitors. Quantum chemical data obtained from density functional theory (DFT) calculations also agreed with the experimental outcomes.

Download Full-text

Green Approach to Corrosion Inhibition of Carbon Steel by Fucus spiralis extract in 1 M HCl Medium

Biointerface Research in Applied Chemistry ◽

10.33263/briac125.70757091 ◽

2021 ◽

Vol 12 (5) ◽

pp. 7075-7091

Keyword(s):

Carbon Steel ◽

Corrosion Inhibitor ◽

Surface Characterization ◽

Electrochemical Impedance ◽

Electrochemical Techniques ◽

Adsorption Model ◽

Corrosion Properties ◽

Uv Visible ◽

Fucus Spiralis ◽

Hcl Medium

The extract of Fucus spiralis (FS) was tested as a corrosion inhibitor of carbon steel in a 1M HCl medium. The anti-corrosion properties were analyzed by gravimetric and electrochemical techniques such as potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). The surface characterization of carbon steel submerged in the optimal solution was carried out using UV-Visible, UV-Vis-NIR, and Optical microscopy analyses. Electrochemical and gravimetric results demonstrated that inhibitory efficiencies increase with increasing inhibitor concentration and the efficiency reaches 87% at a concentration of 0.5 g/L. According to Tafel extrapolated polarisation measurements, the FS also worked as a mixed-type corrosion inhibitor and changed the mechanism of anodic reactions. EIS analysis showed that a depressed capacitive loop dominates the Nyquist plot of impedance and enhances the polarization resistance (Rp) to 161.9 Ω cm2 with a reduction of the double layer capacity (Cdl) of carbon steel to 61.8 μF/cm2. This protection is assured by an adsorption mechanism based on the isothermal Langmuir adsorption model, which positively affects the thermodynamic parameters. UV-Visible, UV-Vis-NIR analyses exhibited that inhibitor decreases the iron oxides like hematite, Magnetite, and Goethite, Maghemite, Lepidocrocite, δ-FeOOH of the metal surface and delays the dissolution of the bare metal of iron to the ferrous ions, notably that optical morphology showed that FS extract decreases the aggressivity of HCl.

Download Full-text

Newly Synthesized N-Substituted Thiosemicarbazone as a Potential Corrosion Inhibitor for Mild Steel in 1 M HCl

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.14.27520 ◽

2019 ◽

Vol 7 (4.14) ◽

pp. 168

Author(s):

N Z. Nor Hashim ◽

K Kassim ◽

F H. Zaidon

Keyword(s):

Mild Steel ◽

Corrosion Inhibitor ◽

Potentiodynamic Polarization ◽

Corrosion Inhibitors ◽

Inhibition Efficiency ◽

Electrochemical Impedance ◽

Langmuir Adsorption ◽

Before And After ◽

Ft Ir ◽

L1 And L2

Two N-substituted thiosemicarbazone derivatives namely as 2-(4-chlorobenzylidene)-N-phenylhydrazinecarbothioamide and 2-benzylidene-N-phenylhydrazinecarbothioamide (L1 and L2, respectively) have been tested as corrosion inhibitors on mild steel in 1 M HCl. The ligands were synthesized and investigated using potentiodynamic polarization (PD) and electrochemical impedance spectroscopy (EIS). The obtained results indicated that inhibition efficiency, (IE, %) L1 increased with increasing inhibitor concentrations which behaved as a good corrosion inhibitor compared to L2. The synthesized ligands were successfully characterized by melting point, elemental analysis (C, H, N, and S), Fourier-transform infrared spectroscopy (FT-IR) and NMR (1H and 13C) spectroscopy. The excellent inhibition effectiveness for both compounds on mild steel before and after immersion in 1 M HCl solution containing 40 ppm of L1 and L2 were also verified by scanning electron microscope (SEM). Based on potentiodynamic polarization results, it can be concluded that all investigated compounds are mixed-type inhibitors and obey the Langmuir adsorption isotherm.

Download Full-text

Electrochemical behaviour of acetyl G as corrosion inhibitor for mild steel in acid medium

Pigment & Resin Technology ◽

10.1108/prt-10-2014-0087 ◽

2015 ◽

Vol 44 (6) ◽

pp. 371-378 ◽

Cited By ~ 1

Author(s):

Y. Sangeetha ◽

S. Meenakshi ◽

C. Sairam Sundaram

Keyword(s):

Mild Steel ◽

Corrosion Inhibitor ◽

Acid Medium ◽

Steel Surface ◽

Inhibition Efficiency ◽

Electrochemical Impedance ◽

Electrochemical Behaviour ◽

Green Inhibitor ◽

Content Type ◽

Mild Steel Surface

Purpose – The purpose of this paper is to develop an eco-friendly corrosion inhibitor for mild steel in 1 M HCl. Design/methodology/approach – A pharmaceutical drug acetyl G was investigated for its corrosion inhibition efficiency using weight loss method, potentiodynamic polarisation and electrochemical impedance spectroscopy. Findings – The inhibition efficiency increased with increase in inhibitor concentration. Results from polarisation studies revealed mixed type of inhibition. Impedance studies, scanning electron microscopy and Fourier transform spectroscopy confirm the adsorption of inhibitor on the mild steel surface. Research limitations/implications – The drug acetyl G has sulphur and nitrogen atoms which effectively block the corrosion of mild steel and is non-toxic and has good inhibition efficiency. Practical implications – This method provides an excellent, non-toxic and cost-effective material as a corrosion inhibitor for mild steel in acid medium. Originality/value – Application of this drug as a corrosion inhibitor has not been reported yet in the literature. Replacing the organic inhibitors, this green inhibitor shows excellent inhibition efficiency. This is adsorbed excellently on the mild steel surface due to the presence of long chain and hetero atoms. Thus, the drug retards the corrosion reaction.

Download Full-text

Inhibitory effect of Atlas cedar essential oil on the corrosion of steel in 1 m HCl

Corrosion Reviews ◽

10.1515/corrrev-2017-0076 ◽

2018 ◽

Vol 36 (4) ◽

pp. 373-384 ◽

Cited By ~ 12

Author(s):

Rachid Idouhli ◽

Abdelouahd Oukhrib ◽

Yassine Koumya ◽

Abdesselam Abouelfida ◽

Abdelaziz Benyaich ◽

...

Keyword(s):

Essential Oil ◽

Corrosion Inhibitor ◽

Organic Molecules ◽

Inhibition Efficiency ◽

Electrochemical Impedance ◽

Inhibitory Effect ◽

Protective Film ◽

Effects Of Temperature ◽

Corrosion Of Steel ◽

Good Agreement

AbstractThe inhibition efficiency of Atlas cedar essential oil (ACEO) as a green corrosion inhibitor on steel in 1 m hydrochloric acidic was studied. The effects of temperature and the concentration of the ACEO inhibitor on the inhibition efficiency were studied. Potentiodynamic polarization and electrochemical impedance spectroscopy were used to test the performance of the inhibitor. We found that the inhibition efficiency of ACEO exceeded 88% at 1 g/l at 298 K and increased with increasing concentration. The evaluation of activation and thermodynamic parameters reveals that the organic molecules of cedar essential oil and its fractions act by chemical adsorption on the metal surface. The adsorption of the inhibitor on the surface of steel is in a good agreement with the Langmuir adsorption isotherm. Increasing concentration of the corrosion inhibitor enhances the surface coverage and formation of a protective film.

Download Full-text