scholarly journals Evaluation of Corrosion Inhibition Efficiency of Aluminum Alloy 2024 by Diaminostilbene and Azobenzene Schiff Bases in 1 M Hydrochloric Acid

2021 ◽  
Vol 2021 ◽  
pp. 1-20
Author(s):  
Shobha Bhaskara ◽  
Sanaulla Pathapalya Fakrudeen ◽  
Tegene Desalegn ◽  
H. C. Ananda Murthy ◽  
V. Bheemaraju
Keyword(s):  
Weight Loss ◽  
Aluminum Alloy ◽  
Schiff Base ◽  
Hydrochloric Acid ◽  
Corrosion Inhibition ◽  
Potentiodynamic Polarization ◽  
Inhibition Efficiency ◽  
2024 Alloy ◽  
Aluminum Alloy 2024 ◽  
Scanning Electron

The Schiff base compounds N,N ′ -bis(salicylidine)-4,4 ′ –diaminostilbene(SDS) and N,N ′ -bis(salicylidine)-4,4 ′ -diamino azobenzene(SDA) were synthesized, and their molecular structure was determined by FT-IR and 1H NMR. The corrosion inhibitions of Schiff base compounds on aluminum alloy 2024 in 1 M hydrochloric acid were evaluated by potentiodynamic polarization, impedance techniques, weight loss method, and scanning electron microscopic technique. The potentiodynamic polarization (PDP) studies revealed that SDS and SDA compounds acted predominantly as cathodic inhibitors. The electrochemical impedance spectroscopic (EIS) parameters confirmed the adsorption of SDS and SDA molecules over the surface of aluminum alloy 2024 alloy by forming an inhibitive layer. The weight loss studies showed that the inhibition efficiency of these compounds increases directly with concentration and decreases with an increase in solution temperature and immersion time. The thermodynamic parameters were calculated to investigate the mechanism of corrosion inhibition. The SDA was found to be more effective than SDS and followed the Langmuir adsorption isotherm model. The scanning electron microscopy (SEM) results revealed that the deterioration of the alloy surface is minimal in the presence of an inhibitor. Both Schiff base molecules exhibited superior corrosion inhibition for aluminum alloy 2024 alloy in HCl medium.

scholarly journals Electrochemical and Surface Morphological Studies of Carbon Steel Corrosion by a Novel Polynuclear Schiff Base in HCl Solution

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
K. S. Shaju ◽  
K. Joby Thomas ◽  
Vinod P. Raphael ◽  
Aby Paul
Keyword(s):  
Weight Loss ◽  
Schiff Base ◽  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Adsorption Isotherm ◽  
Acid Solution ◽  
Corrosion Inhibition ◽  
Hydrochloric Acid Solution ◽  
Inhibition Efficiency ◽  
Morphological Studies

The corrosion inhibition efficiency of a potential polynuclear Schiff base, (s)-2-(anthracene-9 (10H)-ylidene amino)-5-guanidinopentanoic acid (A9Y5GPA), on carbon steel (CS) in 1 M hydrochloric acid solution has been investigated using weight loss measurements, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization studies. The corrosion inhibition efficiencies of parent amine [(s)-2-amino-5-guanidinopentanoic acid] and parent ketone (anthracene-9 (10H)-one) on carbon steel in 1.0 M hydrochloric acid solution have also been investigated using weight loss studies. The electrochemical and weight loss data established that the inhibition efficiency on CS increases with the increase in the concentration of inhibitor, A9Y5GPA. The adsorption of A9Y5GPA obeys the Langmuir adsorption isotherm. Thermodynamic parameters (Kads, ΔGads0) were calculated using the adsorption isotherm. Activation parameters of the corrosion process (Ea, ΔH* and ΔS*) were also calculated from the corrosion rates obtained from temperature studies. Tafel plot analysis revealed that A9Y5GPA acts as a mixed-type inhibitor. A probable inhibition mechanism was also proposed. Surface morphology of the carbon steel specimens in the presence and absence of the inhibitor was evaluated by SEM analysis.

scholarly journals Quantum chemical elucidation on corrosion inhibition efficiency of Schiff base: DFT investigations supported by weight loss and SEM techniques

2020 ◽  
Vol 15 (2) ◽  
pp. 202-209 ◽  
Author(s):  
Ahmed Al-Amiery ◽  
Taghried A Salman ◽  
Khalida F Alazawi ◽  
Lina M Shaker ◽  
Abdul Amir H Kadhum ◽  
...  
Keyword(s):  
Weight Loss ◽  
Schiff Base ◽  
Hydrochloric Acid ◽  
Corrosion Inhibition ◽  
Quantum Chemical ◽  
Density Functional ◽  
Inhibition Efficiency ◽  
Chemical Calculation ◽  
Acid Environment ◽  
Inhibition Performance

Abstract The corrosion inhibition of Schiff base, namely 2-((2-hydroxy-5-methoxybenzylidene)amino)pyridine (HMAP), for mild steel (MS) in a 1 M hydrochloric acid environment was investigated by means of weight loss and scanning electron microscopy techniques. Quantum chemical calculation based on density functional theory (DFT) was carried out on HMAP. Results illustrated that HMAP is a superior inhibitor for the corrosion of MS in 1.0M hydrochloric acid environment, and inhibition efficiency is higher than 90.0% at 0.5 g/L HMAP. Inhibition performance increases with regard to concentration increase and inhibition performance decreases when raising temperature. Adsorption of the inhibitor on the MS surface followed Langmuir adsorption isotherm and the value of the free energy of adsorption; ΔGads indicated that the adsorption of HMAP was a physisorption/chemisorption process. The DFT refers to perfect correlation with methodological inhibition performance.

scholarly journals New Aromatic Azo-Schiff as Carbon Steel Corrosion Inhibitor in 1 M H2SO4

2018 ◽  
Vol 34 (5) ◽  
pp. 2471-2476 ◽  
Author(s):  
Hamida Edan Salman ◽  
Asim A. Balakit ◽  
Ali Ahmed Abdulridha
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibition ◽  
Potentiodynamic Polarization ◽  
Inhibition Efficiency ◽  
Steel Corrosion ◽  
Spectroscopic Techniques ◽  
Different Temperatures ◽  
Corrosion Inhibition Efficiency

A new aromatic Schiff base with azo linkage (AS) has been synthesized and characterized by FT-IR, 1H NMR and 13C NMR spectroscopic techniques. The new compound (AS) has been evaluated as carbon steel corrosion inhibitor at different concentrations (0.005, 0.01, 0.02, 0.04 and 0.08 mM) and different temperatures (303 – 333 K). The corrosion inhibition efficiency was studied by potentiodynamic polarization and weight loss measurements. The effects of concentration and temperature on the inhibition efficiency were studied by potentiodynamic polarization studies, the results showed that increasing concentration of AS increases the inhibition efficiency while increasing the temperature decreases it, the highest corrosion inhibition efficiency, 93.9% was recorded with 0.08 mM of AS at 313 K in 1 M H2SO4. Weight loss measurements showed that the inhibition efficiency reached 97.1% in the presence of AS (0.08 mM) at 313 K. The adsorption process was found to obey Langmuir isotherm, and the adsorption thermodynamic parameters were studied. Scanning electron microscope (SEM) was used to confirm the results.

scholarly journals Corrosion Inhibition of Mild Steel in Hydrochloric Acid by Sodium Lauryl Sulfate (SLS)

2008 ◽  
Vol 5 (2) ◽  
pp. 275-280 ◽  
Author(s):  
Atul Kumar
Keyword(s):  
Weight Loss ◽  
Hydrochloric Acid ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Sodium Lauryl Sulfate ◽  
Inhibition Efficiency ◽  
Lauryl Sulfate ◽  
Electrochemical Polarization ◽  
Corrosion Inhibition Efficiency

Effect of Sodium Lauryl Sulfate (SLS), a surfactant on corrosion of mild steel in 1 M hydrochloric acid was studied using three techniques namely: weight loss, electrochemical polarization and metallurgical research microscopy. Results obtained reveal that SLS is good inhibitor and shows very good corrosion inhibition efficiency (IE). The IE was found to vary with concentration of inhibitor and temperature. The electrochemical polarization result revealed that SLS is anodic in nature.

scholarly journals Study of Jatropha Curcas Extract as a Corrosion Inhibitor in Acidic Medium on Mild Steel by Weight Loss and Potentiodynamic Methods

2020 ◽  
Vol 41 (1) ◽  
pp. 87-93
Author(s):  
Dipak Kumar Gupta ◽  
KM Anita Kafle ◽  
Anju Kumari Das ◽  
Shova Neupane ◽  
Anita Ghimire ◽  
...  
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Potentiodynamic Polarization ◽  
Jatropha Curcas ◽  
Acidic Medium ◽  
Open Circuit Potential ◽  
Inhibition Efficiency ◽  
Open Circuit ◽  
Mixed Type Inhibitor

The corrosion inhibition properties of methanol extract of Jatropha curcas (JC) were investigated for mild steel (MS) in acidic medium using weight loss and potentiodynamic methods. Corrosion inhibition of MS in 1MH2SO4 was studied in the absence and presence of various concentrations of the methanolic extract of Jatropha curcas barks. The results showed an increase in corrosion inhibition with increasing concentration of the extract. The inhibition efficiency of 1000 ppm JC extract from the weight loss and potentiodynamic polarization methods were approximately 92.0% after 24 hours immersion in the acidic solution. Open circuit potential (OCP) and potentiodynamic polarization measurements showed that the JC extract acts as a mixed-type inhibitor.

scholarly journals Inhibitive Action of Ferrous Gluconate on Aluminum Alloy in Saline Environment

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Patricia Abimbola Idowu Popoola ◽  
Sanni Omotayo ◽  
Cleophas A. Loto ◽  
Olawale Muhammed Popoola
Keyword(s):  
Weight Loss ◽  
Aluminum Alloy ◽  
Aluminium Alloy ◽  
Potentiodynamic Polarization ◽  
Inhibition Efficiency ◽  
Saline Environment ◽  
Ferrous Gluconate ◽  
Inhibitive Action ◽  
Good Agreement ◽  
Mixed Type Inhibitor

The corrosion of aluminum in saline environment in the presence of ferrous gluconate was studied using weight loss and linear polarization methods. The corrosion rates were studied in different concentrations of ferrous gluconate 0.5, 1.0, 1.5, and 2.0 g/mL at 28°C. Experimental results revealed that ferrous gluconate in saline environment reduced the corrosion rate of aluminum alloy at the different concentrations studied. The minimum inhibition efficiency was obtained at 1.5 g/mL concentration of inhibitor while the optimum inhibition efficiency was achieved with 1.0 g/mL inhibitor concentration. The results showed that adsorption of ferrous gluconate on the aluminium alloy surface fits Langmuir adsorption isotherm. The potentiodynamic polarization results showed that ferrous gluconate is a mixed type inhibitor. Ferrous gluconate acted as an effective inhibitor for aluminium alloy within the temperature and concentration range studied. The data obtained from weight loss and potentiodynamic polarization methods were in good agreement.

Adsorption and Inhibitive Properties of 1-phenylaminomethyl-benzimidazole on Corrosion of Mild Steel in Hydrochloric Acid

2014 ◽  
Vol 989-994 ◽  
pp. 536-539 ◽  
Author(s):  
Tie Jun Su ◽  
Ke Hua Li
Keyword(s):  
Hydrochloric Acid ◽  
Adsorption Isotherm ◽  
Mild Steel ◽  
Corrosion Inhibition ◽  
Potentiodynamic Polarization ◽  
Steel Surface ◽  
Inhibition Efficiency ◽  
Langmuir Adsorption Isotherm ◽  
Mild Steel Surface ◽  
Langmuir Adsorption

The corrosion inhibition of mild steel in 5.0 M HCl by 1–phenylaminomethyl-benzimidazo -le (PMB) was studied by gravimetric and potentiodynamic polarization methods. Inhibition efficiency of PMB increased with increase in the concentration of inhibitor and decreased with the increase in temperature. PMB acts as anodic-type inhibitor for mild steel. The adsorption of PMB on mild steel surface obeys the Langmuir adsorption isotherm.

scholarly journals Studi Inhibisi Korosi Karboksimetil Kitosanpada Permukaan Baja Lunakdalam H2SO4

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Maria Erna ◽  
Herdini Herdini ◽  
Abdullah Abdullah ◽  
Suharmin Suharmin
Keyword(s):  
Weight Loss ◽  
Electron Microscope ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Inhibition Mechanism ◽  
X Ray ◽  
Weight Loss Method ◽  
Corrosion Inhibition Efficiency ◽  
Loss Method ◽  
Scanning Electron

Abstrak Telah dipelajari efisiensi dan mekanisme inhibisi korosi karboksimetil kitosan (KMK) pada permukaan baja lunak dalam larutanH2SO4.Efisiensi inhibisi korosi ditentukan dengan menggunakan metode pengukuran berat hilang (Weight Loss Method), sedangkan mekanisme inhibisi korosi dipelajari berdasarkan hasil analisis karakterisasi Scanning Electron Microscope- Energy Dispersive X-ray(SEM-EDX). Hasil penelitian menunjukkan bahwa efisiensi inhibisi korosi KMK dalam H2SO4 mencapai 65.12%. Hasil analisis karakterisasi memperlihatkan mekanisme inhibisi KMK pada permukaan baja lunak melalui peristiwa adsorpsi kimia membentuk lapisan pasif berupa senyawa Fe-khelatmelalui unsur O dari gugus –OH dan N dari gugus –NH2 dari molekul KMK Kata kunci : Efisiensi inhibisi korosi, karboksimetil kitosan, mekanisme inhibisi   Abstract The corrosion inhibition efficiencyandmechanism ofcarboxymethylchitosan(CMC) on the surface ofmild steel in H2SO4 solution has studied. Determination of the corrosion inhibition efficiency measurement used Weight Loss Method (WLM), whereas the mechanism of corrosion inhibition studied based on the analysis characterizing Scanning Electron Microscope-Energy Dispersive X-ray (SEM-EDX). The results showed that the corrosion inhibition efficiency of CMC reaches 65.12%. Characterization analysis results showed inhibition mechanism CMC on mild steel surface through chemical adsorption events form a passive layer of Fe-chelate compounds through O elementof -OH group and N element of -NH2 group of molecules KMK. Keywords : corrosion inhibittion efficiency, carboxymethyl chitosan, inhibition mechanism

Inhibition Behavior of a Novel Acidification Inhibitor for Steels at High Temperature

2011 ◽  
Vol 686 ◽  
pp. 574-578 ◽  
Author(s):  
Juan Qin Xue ◽  
Ming Wu ◽  
Jing Xian Li ◽  
Chang Bin Tang ◽  
Cheng Xian Yin
Keyword(s):  
Weight Loss ◽  
High Temperature ◽  
Corrosion Inhibition ◽  
Potentiodynamic Polarization ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Inhibition Efficiency ◽  
Mannich Base ◽  
Potentiodynamic Polarization Curves ◽  
Weight Loss Result

The QL-03 corrosion inhibition system is obtained by the compounds of quinoline quaternary ammonium salt，mannich base and synergist. The mechanism of QL-03 with HP13Cr in 20%HCl is investigated by potentiodynamic polarization curves, EIS and weight loss measurements. The results show that the inhibition efficiency towards HP13Cr steel is improved greatly and reaches as high as 90% at 90°C, as a mixed corrosion inhibition system. Cumulating the inhibition efficiency from electrochemical results is more reasonable than weight loss result.

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