Preparation and Characterization of an Emulsion Paint Based on Arghel Extract as an Eco-Friendly Corrosion Inhibitor

2018 ◽  
Vol 786 ◽  
pp. 149-158
Author(s):  
F.M. Mahgoub ◽  
Ahmed Hefnawy ◽  
Mohamed El-Shnawie ◽  
Ahmed Esmaiel
Keyword(s):  
Corrosion Inhibitor ◽  
Corrosion Inhibitors ◽  
Sea Water ◽  
Electrochemical Impedance ◽  
Environmentally Friendly ◽  
Immersion Test ◽  
Sem Analysis ◽  
Optical Measurements ◽  
Acrylic Emulsion ◽  
Emulsion Paint

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.

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

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. 

scholarly journals Water Pipes Corrosion Inhibitors for Q235 Steel in Hydrochloric Acid Medium Using Spiropyrazoles Derivatives

Coatings ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 167 ◽  
Author(s):  
A. M. Eldesoky ◽  
Hala. M. Hassan ◽  
Abdu Subaihi ◽  
Abeer El Shahawy ◽  
Thoraya A. Farghaly
Keyword(s):  
Distribution Systems ◽  
Corrosion Inhibitors ◽  
Sea Water ◽  
Electrochemical Impedance ◽  
Binding Mode ◽  
Outcome Data ◽  
Water Desalination ◽  
Q235 Steel ◽  
Water Pipes ◽  
Tafel Polarization

Water pipes and drinking water quality deterioration in distribution systems and sea water desalination impose the use of corrosion inhibitors. The protective effect of spiropyrazole derivatives against Q235 steel and its adsorption performance were examined in solution of 1 M HCl utilizing TP (Tafel polarization), electrochemical frequency modulation (EFM), and electrochemical impedance spectroscopy (EIS) tests. The outcome data from hindrance efficiency rise with the dose of inhibitor. The orders of %IE of spiropyrazole derivatives are given: (1) > (2) > (3).It was noted that the values of EHOMO and ELUMO dropping in order run parallel to the improvement in %IE, which support the preceding order. EIS spectra exhibited one capacitive loop and approve the protective ability. Molecular docking was utilized to get a full picture on the binding mode among spiropyrazoles derivatives and the receptor of 3tt8-hormone of crystal structure examination of Cu human insulin derivative. The morphology of protected Q235 steel was evaluated by checking electron magnifying instrument innovation with energy dispersive X-beam spectroscopy (SEM–EDX).

scholarly journals CORROSION OF GALVANIZED STEEL AND COPPER IN AQUEOUS ENVIRONMENTS

2014 ◽  
Vol 43 (2) ◽  
pp. 61-67
Author(s):  
Md. Moniruzzaman ◽  
Md. Mohar Ali Bepari ◽  
M. Merajul Haque ◽  
S. Alam Limon
Keyword(s):  
Corrosion Rate ◽  
Sea Water ◽  
Immersion Test ◽  
Sem Analysis ◽  
Galvanized Steel ◽  
Nacl Solution ◽  
Test Technique ◽  
Corrosion Resistant ◽  
Aqueous Environments ◽  
Short Time

Corrosion test of galvanized steel and copper (Cu) has been carried out in three different aqueousenvironments e.g. 5% NaCl solution, sea water and rain water by immersion test technique. Corrosion rate ismeasured in mdd (mg/dm2/day) unit. Corrosion characteristics of the corroded samples are investigated by XRD,XRF and SEM analysis. Irrespective of the exposure duration, Cu is seen better corrosion resistant thangalvanized steel in 5% NaCl solution. Cu corrosion behavior is similar in 5% NaCl solution and the sea wateras well. Formation of protective Cu2O scale on Cu surface is believed to decrease its corrosion rate withincreasing exposure time both in 5% NaCl solution and sea water. Pitting corrosion occurs on Cu surface. Forvery short time exposure Cu is more corrosion resistant but galvanized steel becomes more useful than Cu forlonger exposure in rain water.DOI: http://dx.doi.org/10.3329/jme.v43i2.17828

OAT EXTRACT AS A NATURAL CORROSION INHIBITOR FOR MILD STEEL IN 3% NaCl SOLUTION

2021 ◽  
pp. 2150084
Author(s):  
A. ZAABAR ◽  
R. AITOUT ◽  
D. AMOURA ◽  
R. MAIZIA ◽  
D. AIT ABDESSELAM ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Surface Condition ◽  
Sem Analysis ◽  
Environmental Legislation ◽  
Polarization Data ◽  
Langmuir Adsorption ◽  
Natural Corrosion

In this work, we have tested a new inhibitor formulation that is effective, economically efficient and in accordance with environmental legislation. The inhibitor tested is the crude extract of the oat plant (denoted as OE) obtained by the reflux method in the water. This extract is then used as a corrosion inhibitor of mild steel in 3% NaCl. This study was carried out by using electrochemical polarizations, Electrochemical Impedance Spectroscopy and gravimetric techniques. The results obtained showed that this extract satisfactorily inhibits the dissolution rate of mild steel. The inhibition efficiency increases with inhibitor concentration and reaches 72% at 5[Formula: see text]g[Formula: see text][Formula: see text][Formula: see text]L[Formula: see text] of oat extract. Polarization data indicate that the extract acted as mixed type. The adsorption of the inhibitor on the mild steel surface in 3% NaCl follows the Langmuir adsorption isotherm. SEM analysis of the electrode surface condition confirms the results obtained.

scholarly journals Self-healing performance of smart coatings modified with different corrosion inhibitors

2020 ◽  
Author(s):  
Sehrish Habib ◽  
Eman Fayyed ◽  
Muddasir Nawaz ◽  
Adnan Khan ◽  
Abdul Shakoor ◽  
...  
Keyword(s):  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Protective Layer ◽  
Sem Analysis ◽  
Self Healing ◽  
Defect Site ◽  
Corrosion Inhibition Efficiency ◽  
Eis Measurements

Corrosion results in considerable materials and equipment failure. According to one survey, about 1/4 to 1/3 of the total interruption in industries is due to detrimental effects of corrosion. It is, therefore, important to prevent corrosion to guarantee the reliability of the assets. The present work is aimed to explore the purpose of CeO2 as a carrier for corrosion inhibitors and its capability to release inhibitors, to achieve decent corrosion protection efficiency in epoxy-based polymeric nanocomposite coatings. Amine-based corrosion inhibitors (N-methylthiourea NMTU and Dodecylamine DDA) were used for CeO2 nano container modification, and corrosion inhibition efficiency has been explored utilizing electrochemical impedance spectroscopy (EIS) in 3.5 wt% NaCl solution. Loading of inhibitor into nanocontainer has been confirmed through Fouriertransform infrared spectroscopy (FTIR) and Brunauer-Emmett-Teller (BET). It was observed that 25% and 29.75% w/w of NMTU and DDA were loaded into nanocontainers, confirmed through Thermogravimetric analysis (TGA). Scanning electron microscopy (SEM) analysis endorsed the formation of a protective layer on a scratch area to protect steel from the external environment. This protective layer played a very important role in protecting steel from progressing corrosion on the defect site from the aggressiveness of the solution. EIS measurements revealed the decent corrosion inhibition efficiency of these inhibitors in order of DDA>NMTU. As a result, they are a favorable solution for longer endurance of coated piping steel and decreased operation expense contributing to economic savings, materials reliability and safety.

scholarly journals Sage Extract as a Natural Source of Corrosion Inhibitor for Tinplate in 3.0 % NaCl

2021 ◽  
Vol 59 (4) ◽  
Author(s):  
Maja Dent ◽  
Regina Fuchs-Godec
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Sodium Chloride ◽  
Impedance Spectroscopy ◽  
Corrosion Inhibitor ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Low Cost ◽  
Green Inhibitor

Research background. Due to the growing interest and attention of the world towards environmental problems and protection of environment, the worldwide demand for biodegradable and effective corrosion inhibitors for tinplate has grown. Considering the diversity of the structures of polyphenols that are present in sage extract, it represents a promising potential source of low-cost and biodegradable effective green corrosion inhibitors for tinplate in 3.0 % sodium chloride solution which is evaluated in this study. Experimental approach. Tafel polarization and electrochemical impedance spectroscopy (EIS) at 25 °C has been used to evaluate the inhibition action of sage (Salvia officinalis, L.) extract as a green inhibitor for the corrosion protection for tinplate in 3.0 % sodium chloride solution. Results and conclusions. Electrochemical impedance spectroscopy has been used to show that sage extract could serve as an effective inhibitor (90.2 %) for the corrosion of tinplate in 3.0 % NaCl at a concentration of 0.2 mg/L, and temperature of 25 °C. The results obtained from potentiodynamic polarization have revealed that the sage extract inhibitor acts as a mixed type, with inhibition efficiency up to 82.5% and the inhibition efficiencies calculated from EIS are in close agreement with those results. FTIR results indicated that the inhibitory effect of the sage extract is due to the presence of a passivation layer on the tinplate surface, which consists of organic compounds such as polyphenols. It has been confirmed by these results that the sage extract is more efficient at inhibiting the corrosion of tinplate at a concentration of 0.2 mg/L than in higher concentrations. Also, it exhibits good inhibitive performance for tinplate in 3 % sodium chloride solution. Novelty and scientific contributions. The exceptional corrosion potential of sage extract opens a door for its use and revalorization as a green corrosion inhibitor in the food industry.

The Protection of Reinforcing Steel in Concrete by Migrating Corrosion Inhibitor

2014 ◽  
Vol 629-630 ◽  
pp. 136-143
Author(s):  
J.S. Cai ◽  
C.C. Chen ◽  
J.Z. Liu ◽  
L. Shi
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Carbon Steel ◽  
Impedance Spectroscopy ◽  
Corrosion Inhibitor ◽  
Linear Polarization ◽  
Polarization Resistance ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Reinforcing Steel ◽  
Linear Polarization Resistance

In this paper, the performance of two kinds of migrating corrosion inhibitors on the corrosion behavior of steel in concrete under wet-dry cycle was investigated. The wet-dry cycle duration on the open circuit, current density and impedance of carbon steel imbedded in concrete were analyzed by linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS). The results show that two kinds of migrating corrosion inhibitors can restrain corrosion of reinforcing steel, the corrosion efficiency of ZX was less more than MCI. Migrating corrosion inhibitor not only can improve carbon steel impedance, also can improve concrete resistant. Key words: migrating corrosion inhibitor;Cl-;reinforcing steel;linear polarization resistance;electrochemical impedance spectroscopy

Seed Extracts as Natural, Green, Non-Toxic Corrosion Inhibitors

2021 ◽  
Author(s):  
Jun Hong Clarence Ng ◽  
Tariq Almubarak ◽  
Hisham A. Nasr-El-Din
Keyword(s):  
High Temperature ◽  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Environmentally Friendly ◽  
Base Case ◽  
Control Solution ◽  
Edible Seeds ◽  
Acid Treatments

Abstract Acid treatments are commonly used in the oilfield to remove inorganic scale or to stimulate formatio ns. These treatments typically consist of using hydrochloric acid (HCl), acetic acid, formic acid, or chelating agents. At elevated temperatures, these acids are highly corrosive and can cause severe damage to tubulars as well as downhole equipment. To reduce damage from these acids, corrosion inhibitors are added to the treatment solution. Corrosion inhibitors used in the oil and gas industry are typically quaternary amines or sulfur-containing compounds. These compounds adsorb to the surface of the metal, thereby reducing contact between the metal surface and the corrosive substance. However, these corrosion inhibitors are damaging to the environment and harmful to human health. Alternative new environmentally-friendly corrosion inhibitors are also either toxic to the human body or face performance limitations at higher temperature field applications. To develop new environmentally friendly and non-toxic corrosion inhibitors for high-temperature applications, 15 edible seeds were tested as alternative sources of corrosion inhibitors. In order to determine the inhibition effect of 15 different seeds, N-80 and S13Cr coupons were exposed to 15 wt.% HCl solutions at temperatures between 77-250°F with 2 wt.% of grounded seed added for 6 hours. In addition, a control solution containing no corrosion inhibitor was used to establish a corrosion rate for a base case. This paper will show the results of such seeds and attempt to provide an awareness of natural seeds extract for use as corrosion inhibitors in conjunction with well acid treatments. It was noted that out of the 15 seeds, seeds 1 and 2 were found to perform the best at these conditions, exhibiting more than 90% corrosion inhibition efficiency. Seed 4 was observed to perform the worst, exhibiting only 16.8% inhibition efficiency. At 150°F, 2 wt.% of seeds 1 and 2 were tested with seed 1 achieving a corrosion rate of 0.00253 lb/ft2 while seed 2 was unable to provide sufficient inhibition with a corrosion rate of 0.153 lb/ft2. The control solution was found to have a corrosion rate of 0.371 lb/ft2 over the 6 hours at 150°F. Seed 1 was further tested at 200°F with the addition of corrosion inhibitor intensifiers and resulted in a corrosion rate of 0.00087 lb/ft2, while at 250°F, a corrosion rate of 0.00811 lb/ft2 was observed. The tests using S13Cr also showed that seed 1 worked well as a corrosion inhibitor for CRAs. The thermal degradation of seed 1 was also examined using NMR. These results show a new naturally occurring, green, non-toxic, high-temperature applicable corrosion inhibitor that can be developed from edible seeds.

scholarly journals A Study of 1-Benzyl-3-phenyl-2-thiourea as an Effective Steel Corrosion Inhibitor in 1.0 M HCl Solution

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Quy Huong Dinh ◽  
Tran Duong ◽  
Nam Pham Cam
Keyword(s):  
Corrosion Inhibitor ◽  
Steel Surface ◽  
Functional Group ◽  
Inhibition Efficiency ◽  
Electrochemical Impedance ◽  
Theoretical Calculations ◽  
Steel Corrosion ◽  
Sem Analysis ◽  
Polarization Measurement ◽  
Hcl Solution

1-Benzyl-3-phenyl-2-thiourea (BPTU) was studied as a steel corrosion inhibitor in 1.0 M HCl solution. Experimental methods were conducted including potentiodynamic polarization measurement (PPM), electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM) analysis. Quantum calculations were performed at B3LYP/6-311G(d,p). Hexamethylenetetramine (URO) was selected for comparison with BPTU. The results showed that BPTU with the concentration of 2 × 10−4 M and at the temperature of 30°C could protect the steel surface with the highest inhibition efficiency of 94.99% and 94.30% according to EIS and PPM, respectively. High temperature decreased BPTU’s ability to inhibit the steel corrosion. The adsorption of BPTU on the steel surface is followed by the modified Langmuir isotherm. Quantum chemical calculations showed that the thiourea functional group is the main adsorption center of BPTU. The experimental results are completely consistent with theoretical calculations.

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