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

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).

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The Inhibition of Mild Steel Corrosion in Sulfuric Acid by New Dapsone Derivatives

JOURNAL OF ADVANCES IN CHEMISTRY ◽

10.24297/jac.v10i3.2289 ◽

2014 ◽

Vol 10 (3) ◽

pp. 2388-2402 ◽

Cited By ~ 1

Author(s):

M.P. Chakravarthy ◽

Dr. K. N. Mohana ◽

C.B. Pradeep Kumar

Keyword(s):

Mild Steel ◽

Corrosion Inhibitors ◽

Electrochemical Impedance ◽

Steel Corrosion ◽

Tafel Polarization ◽

New Class ◽

Mild Steel Corrosion ◽

Langmuir Isotherm Model ◽

Polarization Studies ◽

Corrosion Inhibition Efficiency

Dapsone derivatives Viz., 4, 4’-sulfonylbis(N-((1H-pyrrol-2-yl)methylene)aniline) (SBPMA) and 2-dimethylamino-5-[(4-{4-[(4-dimethylamino-benzylidene)-amino]-benzenesulfonyl}-phenylimino)-methyl]-benzene (DBBPB), a new class of corrosion inhibitors have been synthesized and their corrosion inhibition efficiency on mild steel in 0.5 M H2SO4 was investigated by mass loss, Tafel polarization and AC impedance measurements. Potentiodynamic polarization studies showed that, these compounds behave as mixed type of corrosion inhibitors. The adsorption process was found to obey Langmuir isotherm model. Electrochemical impedance spectroscopy (EIS) studies revealed that polarization resistance (RP) increases and double layer capacitance (Cdl) decreases as the concentration of the inhibitors increases. Various thermodynamic parameters for the adsorption of inhibitors on mild steel were computed and discussed. FTIR, EDX and SEM analyses were performed to study the film persistency of the inhibitors.

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Study on Accelerated Corrosion Electrochemical Behavior of Q235B Steel in Sea Water

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.229-231.40 ◽

2012 ◽

Vol 229-231 ◽

pp. 40-43

Author(s):

Yong Liu ◽

Xing Hua Tong ◽

Bao Guo Li ◽

Yan Gang Wang ◽

Lin Sen Zhu

Keyword(s):

Corrosion Rate ◽

Electrochemical Behavior ◽

Sea Water ◽

Electrochemical Impedance ◽

Initial Period ◽

Polarization Curves ◽

Positive Role ◽

Accelerated Corrosion ◽

Tafel Polarization ◽

Corrosion Electrochemical Behavior

In order to study the corrosion behavior of Q235B steel in seawater at Weihai, the indoor simulated and accelerated corrosion test is carried out by adding H2O2 in seawater. Tafel polarization curves and electrochemical impedance spectroscopy (EIS) techniques are employed to investigate the corrosion electrochemical behavior of Q235B steel. Polarization curves and EIS are acquired by electrochemical workstation. From polarization curves, it is found that the corrosion rate rises rapidly during the initial period, and it becomes highest on the 3rd day, then drops, and tends to be stable after about 15 days. After that, the corrosion rate reduces slowly due to the covering effect of corrosion products, and then the conclusion is confirmed by EIS analysis. Analytical results indicate that the rust layer plays a positive role of hindering the corrosion process.

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The Study of Composite Substituting Mercury Corrosion Inhibitors for Zinc in Zinc-Manganese Battery

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.881-883.102 ◽

2014 ◽

Vol 881-883 ◽

pp. 102-107 ◽

Cited By ~ 1

Author(s):

Yun Cui ◽

Di Shun Zhao ◽

Hai Qu ◽

Guan Wei Qu ◽

Jing Liu ◽

...

Keyword(s):

Corrosion Inhibitors ◽

Inhibition Efficiency ◽

Electrochemical Impedance ◽

Orthogonal Experiment ◽

Single Factor ◽

Coated Paper ◽

Environment Friendly ◽

Tafel Polarization ◽

Zinc Corrosion ◽

New Type

The inhibition behavior of a new type of mercury-free composite inhibitors for zinc corrosion in zinc-manganese dry battery was studied by single factor test and orthogonal experiment. Its inhibitor mechanism was investigated by Tafel polarization curve, electrochemical impedance spectroscopy (EIS) techniques. The performances of the coated paper and self-assembled battery were detected. The results showed that: the inhibition efficiency of the composite substituting mercury corrosion inhibitors was up to 93.33%. The performances of the coated paper and battery were consistent with standards. The composite corrosion inhibitors are a green environment- friendly corrosion inhibitor, which is expected to replace mercury in zinc-manganese dry batteries.

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

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.786.149 ◽

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.

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Study of the Ecological Footprint and Carbon Footprint in a Reverse Osmosis Sea Water Desalination Plant

Membranes ◽

10.3390/membranes11060377 ◽

2021 ◽

Vol 11 (6) ◽

pp. 377

Author(s):

Federico Leon ◽

Alejandro Ramos-Martin ◽

Sebastian Ovidio Perez-Baez

Keyword(s):

Reverse Osmosis ◽

Canary Islands ◽

Ecological Footprint ◽

Sea Water ◽

Water Desalination ◽

Energy Costs ◽

Generation System ◽

Negative Part ◽

Desalination Plant ◽

Materials Used

The water situation in the Canary Islands has been a historical problem that has been sought to be solved in various ways. After years of work, efforts have focused on desalination of seawater to provide safe water mainly to citizens, agriculture, and tourism. Due to the high demand in the Islands, the Canary Islands was a pioneering place in the world in desalination issues, allowing the improvement of the techniques and materials used. There are a wide variety of technologies for desalination water, but nowadays the most used is reverse osmosis. Desalination has a negative part, the energy costs of producing desalinated water are high. To this we add the peculiarities of the electricity generation system in the Canary Islands, which generates more emissions per unit of energy produced compared to the peninsular generation system. In this study we have selected a desalination plant located on the island of Tenerife, specifically in the municipality of Granadilla de Abona, and once its technical characteristics have been known, the ecological footprint has been calculated. To do this we have had to perform some calculations such as the capacity to fix carbon dioxide per hectare in the Canary Islands, as well as the total calculation of the emissions produced in the generation of energy to feed the desalination plant.

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Spilanthes acmella Leaves Extract for Corrosion Inhibition in Acid Medium

Coatings ◽

10.3390/coatings11010106 ◽

2021 ◽

Vol 11 (1) ◽

pp. 106

Author(s):

Akbar Ali Samsath Begum ◽

Raja Mohamed Abdul Vahith ◽

Vijay Kotra ◽

Mohammed Rafi Shaik ◽

Abdelatty Abdelgawad ◽

...

Keyword(s):

Mild Steel ◽

Corrosion Inhibition ◽

Active Sites ◽

Inhibition Efficiency ◽

Electrochemical Impedance ◽

Film Formation ◽

Protective Film ◽

Surface Protection ◽

Tafel Polarization ◽

Spilanthes Acmella

In the present study, the corrosion inhibition effect of Spilanthes acmella aqueous leaves extract (SA-LE) on mild steel was investigated in 1.0 M HCl solution at different temperature using weight loss, Tafel polarization, linear polarization resistance (LPR), and electrochemical impedance (EIS) measurements. Adsorption of inhibitor on the surface of the mild steel obeyed both Langmuir and Temkin adsorption isotherms. The thermodynamic and kinetic parameters were also calculated to determine the mechanism of corrosion inhibition. The inhibition efficiency was found to increase with an increase in the inhibitor concentration i.e., Spilanthes acmella aqueous leaves extract, however, the inhibition efficiency decreased with an increase in the temperature. The phytochemical constituents with functional groups including electronegative hetero atoms such as N, O, and S in the extract adsorbed on the metal surface are found responsible for the effective performance of the inhibitor, which was confirmed by Fourier-transform infrared spectroscopy (FT-IR) and ultraviolet–visible spectroscopic (UV-Vis) studies. Protective film formation against corrosion was confirmed by scanning electron microscopy (SEM), atomic force microscopy (AFM), and contact angle studies. The result shows that the leaves extract acts as corrosion inhibitor and is able to promote surface protection by blocking active sites on the metal.

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Novel pyrimidine-bichalcophene derivatives as corrosion inhibitors for copper in 1 M nitric acid solution

RSC Advances ◽

10.1039/d1ra03603c ◽

2021 ◽

Vol 11 (41) ◽

pp. 25314-25333

Author(s):

Mai A. Khaled ◽

Mohamed A. Ismail ◽

Ahmed. A. El-Hossiany ◽

Abd El-Aziz S. Fouda

Keyword(s):

Weight Loss ◽

Electrochemical Impedance Spectroscopy ◽

Nitric Acid ◽

Impedance Spectroscopy ◽

Acid Solution ◽

Nitric Acid Solution ◽

Potentiodynamic Polarization ◽

Corrosion Inhibitors ◽

Electrochemical Impedance ◽

Pyrimidine Derivatives

This study targets the investigation of three pyrimidine derivatives (MA-1230, MA-1231, MA-1232) for the prevention of corrosion on copper in 1 M HNO3via weight loss (WL), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) techniques.

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