Enhancing the Corrosion Inhibition Behaviour of Epoxidized Natural Rubber-Polyaniline Dodecylbenzenesulfonate Blend via the Incorporation of WO3

2017 ◽  
Vol 25 (2) ◽  
pp. 135-142 ◽  
Author(s):  
K.C. Yong
Keyword(s):  
Carbon Steel ◽  
Natural Rubber ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Electrochemical Corrosion ◽  
Epoxidized Natural Rubber ◽  
Host Matrix ◽  
Electrically Conductive ◽  
Order Of Magnitude ◽  
First Time

Electrically-conductive (in the region of 10−3 S.cm−1) epoxidized natural rubber-polyaniline dodecylbenzenesulfonate [ENR-PAni.DBSA] blend was prepared, and the effect of incorporation of WO3 on its corrosion inhibition behaviour for carbon steel was assessed for the first time. It was found that the electrical conductivity of this blend could be enhanced by up to an order of magnitude for WO3 loadings of 20.0–22.5 wt.%. From both total immersion and electrochemical corrosion tests, ENR-PAni.DBSA blends with 20.0–22.5 wt.% of WO3 were found to be the best corrosion inhibitors for carbon steel, in both acid and artificial brine environments. However, a blend containing a higher WO3 content (i.e. 25.0 wt.%) showed a significant poorer corrosion inhibition behaviour for carbon steel due to its more severe phase separation and porosity between the ENR host matrix and WO3.

CORROSION-INHIBITING BEHAVIOR OF EPOXIDIZED NATURAL RUBBER–POLYANILINE DODECYLBENZENESULFONATE (ENR-PANI.DBSA) BLENDS

2014 ◽  
Vol 87 (3) ◽  
pp. 526-537 ◽  
Author(s):  
K. C. Yong
Keyword(s):  
Carbon Steel ◽  
Natural Rubber ◽  
Electrochemical Corrosion ◽  
Epoxidized Natural Rubber ◽  
Electrically Conductive ◽  
Corrosion Tests ◽  
Total Immersion ◽  
Very High ◽  
Brine Environment

ABSTRACT Electrically conductive (up to 10−1 S cm−1) ENR-PAni.DBSA blends were produced, and their corrosion-inhibiting behaviors for carbon steel were successfully investigated. As observed from both total immersion and electrochemical corrosion tests, ENR-PAni.DBSA blends consisted of very low and very high PAni.DBSA contents (i.e., ≤5.0 wt% and ≥40.0 wt%) and showed poor corrosion-inhibiting behavior for carbon steel, either in acid or artificial brine environment. Meanwhile, blends with 10.0 to 30.0 wt% of PAni.DBSA content exhibited the best corrosion-inhibiting behavior for carbon steel.

scholarly journals Corrosion Inhibition Performances of Imidazole Derivatives-Based New Ionic Liquids on Carbon Steel in Brackish Water

2020 ◽  
Vol 10 (20) ◽  
pp. 7069
Author(s):  
Megawati Zunita ◽  
Deana Wahyuningrum ◽  
Buchari ◽  
Bunbun Bundjali ◽  
I Gede Wenten ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Brackish Water ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Nacl Solution ◽  
Adsorption Mechanisms ◽  
Water Media ◽  
Steel Surfaces

In this study, imidazole derivative-based new ionic liquids were investigated as corrosion inhibitors. These new ionic liquids (ILs) are 1,3-dipropyl-2-(2-propoxyphenyl)-4,5-diphenylimidazole iodide (IL1) and 1,3-dibutyl-2-(2-butoxyphenyl)-4,5-diphenylimidazole iodide (IL2). The corrosion inhibition effects of two new ILs were observed on carbon steel in brackish water media (1% NaCl solution). Carbon steel coupons were exposed to 1% NaCl solution with various concentrations of ILs. Corrosion inhibition effects were tested by the electrochemical impedance spectroscopy (EIS) method and the Tafel method at various temperatures ranging from 25 °C to 55 °C. The results showed that ILs have potential as corrosion inhibitors and the adsorption mechanisms of IL1 and IL2 on carbon steel surfaces were also determined, which followed the Langmuir adsorption isotherm model. Acquisition of ∆Gads values of IL1 and IL2 were −35.04 and −34.04 kJ/mol, respectively. The thermodynamic data of the ILs show that semi-chemical and or physical adsorptions occurred on carbon steel surfaces.

Corrosion inhibition of carbon steel in hydrochloric acid solution using newly synthesized urea-based cationic fluorosurfactants: experimental and computational investigations

2020 ◽  
Vol 44 (41) ◽  
pp. 17791-17814 ◽  
Author(s):  
Hany M. Abd El-Lateef ◽  
K. Shalabi ◽  
Ahmed H. Tantawy
Keyword(s):  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Corrosion Inhibition ◽  
Hydrochloric Acid Solution ◽  
Corrosion Inhibitors ◽  
Acid Pickling ◽  
Anticorrosion Properties

The results of this report show that synthesized fluorosurfactants can be applied as effective corrosion inhibitors with good anticorrosion properties for hydrochloric acid pickling of carbon steel.

SIGNIFICANCE OF π–ELECTRONS IN THE DESIGN OF CORROSION INHIBITORS FOR CARBON STEEL IN SIMULATED CONCRETE PORE SOLUTION

CORROSION ◽  
10.5006/3844 ◽  
2021 ◽  
Author(s):  
Ahmed Mohamed ◽  
D. Visco Jr. ◽  
David M. Bastidas
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Pore Solution ◽  
Molecular Descriptor ◽  
Structure Property ◽  
Multilinear Regression ◽  
Pitting Potential ◽  
Novel Approach ◽  
Inhibition Performance

Chloride–induced corrosion of carbon steel reinforcements is one of the most important failure mechanisms of reinforced concrete structures. Organic corrosion inhibitors containing different functional groups were analyzed using cyclic potentiodynamic polarization to determine their effect on the pitting potential of carbon steel reinforcements in a 0.1 M Cl– contaminated simulated concrete pore solution. It was found that organic compounds with π–electrons in a functional group had better performance. This is attributed to the high density of highest occupied molecular orbital energies found in carboxyl group π–bond. Accordingly, increasing the tendency of donating π–electrons to the appropriate vacant d–orbital of the carbon steel, forming an adsorption film. The best corrosion inhibition performance was achieved by poly–carboxylates followed by alkanolamines and amines. In addition, a novel approach to show the significance of corrosion inhibition phenomenon was applied by developing a quantitative structure-property relationship using the Signature molecular descriptor which correlates the occurrences of atomic Signatures in a dataset to a property of interest using a forward stepping multilinear regression. The atomic Signature fragment capturing π–bond was the most influential of all the fragments, which underscores the significance of π–bond electrons in the adsorption process. It was demonstrated that the [O](=[C]) atomic Signature plays a crucial role in the inhibition process at all heights, corroborating the experimental results.

scholarly journals Organic Phosphorus Compounds as Inhibitors of Corrosion of Carbon Steel in Circulating Cooling Water: Weight Loss Method and Thermodynamic and Quantum Chemical Studies

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Liang Liu ◽  
Ting-Ting Cao ◽  
Qi-Wei Zhang ◽  
Chong-Wei Cui
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Organic Phosphorus ◽  
Cooling Water ◽  
Circulating Cooling Water ◽  
Weight Loss Method ◽  
Corrosion Inhibition Efficiency ◽  
Loss Method

Circulating cooling water plays an important role in industrial water use. In this study, the corrosion inhibition effects of PBTCA, HEDP, and ATMP organic phosphorus inhibitors were investigated using the weight loss method by varying the dosage of inhibitors, ClO2 concentrations, and pH values on carbon steel in recirculating cooling water with a low concentration of ClO2 solution. The results showed that the three corrosion inhibitors had a satisfactory corrosion inhibition effect and that corrosion inhibition efficiency is positively correlated with the concentration of organic phosphorus inhibitors and pH. The average corrosion inhibition efficiency of the three inhibitors was about 80% at the concentration of inhibitors = 35 mg/L, pH = 9.0, and the concentration of ClO2 = 7.0 mg/L, of which the single-phosphorus molecular corrosion inhibitor proved to be the best inhibitor. When the ClO2 concentration was 7 mg/L, the corrosion inhibition efficiencies of the three corrosion inhibitors were relatively stable. Using the density functional theory (DFT) algorithm in the Gaussian 09 program, the optimization calculation was completed by the B3LYP/6-31G (d, p) method at the microlevel. The molecular structures of the three organic phosphorus inhibitors and the number of phosphorus-containing atoms were compared to the sustained-release properties. Organic phosphorus inhibitors, as an electronic buffer, not only provided electrons but also received electrons. They formed a complex with iron and zinc ions in water in order to attach to the surface of the carbon steel and to alleviate corrosion. In addition, the adsorption with a metal surface followed the Langmuir adsorption isotherm.

Electrochemical Corrosion Inhibition System for Photoresist Stripper for New Copper FPD Manufacturing

2007 ◽  
Vol 990 ◽  
Author(s):  
Seiji Inaoka ◽  
Sang In Kim
Keyword(s):  
Corrosion Inhibitor ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Electrochemical Corrosion ◽  
Inhibition Mechanism ◽  
Copper Corrosion ◽  
Photoresist Stripper ◽  
Copper Corrosion Inhibition

ABSTRACTDevelopment of photoresist stripper with copper compatibility is challenging as conventional corrosion inhibitors do not protect the metal as expected. Copper corrosion inhibition mechanism of newly developed photoresist stripper is proposed that significantly reduces copper corrosion with small amount of corrosion inhibitor.

Erosive Ions in Industrial Boiler Water on the Corrosion Behavior of Water-Wall Tubes

2013 ◽  
Vol 328 ◽  
pp. 877-881
Author(s):  
Mao Dong Li ◽  
Bin Zeng ◽  
Yu Hui Du ◽  
Juan Liu ◽  
Jun Ming Zhao ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Corrosion Behavior ◽  
Concentration Ratio ◽  
Electrochemical Corrosion ◽  
Chloride Ion ◽  
Boiler Water ◽  
Water Wall ◽  
Electrochemical Corrosion Behavior ◽  
Industrial Boiler

The maximum allowable content of chloride ion in industrial boiler water is closely related to the concentration ratio and operating conditions, the reasons for industrial boiler can not be operated under too high concentration ratio is due to the limit of Cl- content. There are many studies for the electrochemical corrosion behavior of carbon steel caused only by chloride ion, but few studies for calcium and bicarbonate ions on the electrochemical corrosion behavior of carbon steel. In order to study the corrosion of water-wall tubes for industrial boilers (20# carbon steel) caused by chloride ion, the erosive anion (Cl) and Ca2+, electrochemical impedance spectroscopy and Tafel polarization techniques were performed. Autoclave static experiments were performed to study the corrosion inhibition property of carbon steel with 1-hydroxyethylidene-1, 1-diphosphonic acid (HEDP) additive in industrial boiler water medium. The results showed that Cl- could promote the corrosion of carbon steel obviously, HEDP has a good corrosion inhibition effect on 20# carbon steel at a concentration of 25 mg/L; Lower concentration Ca2+ in industrial boiler water could promote the corrosion while addition of higher concentration Ca2+ could inhibit the corrosion. It can provide a reference for the safe operation of the industrial boiler.

Corrosion Inhibition of a Carbon Steel by 2-Ethylamino-Ethanol in Aerated 3% NaCI Solutions – Effect of pH

CORROSION ◽  
1979 ◽  
Vol 35 (9) ◽  
pp. 392-397 ◽  
Author(s):  
M. DUPRA T ◽  
N. BUI ◽  
F. DABOSI
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Ph Value ◽  
Surface Film ◽  
Measurement Techniques ◽  
Electrochemical Corrosion ◽  
Rate Measurement ◽  
Differential Efficiency ◽  
Overall Efficiency ◽  
Corrosion Rate Measurement

Abstract Colorimetric and electrochemical corrosion rate measurement techniques were used to evaluate the efficiency of 2-ethylamino-ethanol in corrosion inhibition of a carbon steel in aerated 3% NaCI solutions. It was shown that, for inhibitor concentrations above 310 ppm, the high pH value of the solutions is by itself responsible for a partial 40% efficiency in corrosion protection, as compared to an overall efficiency of about 90%. In order to differentiate the intrinsic inhibiting action of 2-ethylamino-ethanol, another efficiency definition is proposed as a differential efficiency, in which the influence of the pH is eliminated. The obtained differential values range from 70 to 80%. This high activity of the inhibitor may be interpreted both by its ability to stabilize the hydroxide surface film and by its adsorption onto bare sites of the metal.

New corrosion inhibitors based on epoxidized natural rubber for coating protection of metals under UV irradiation

2017 ◽  
Vol 64 (4) ◽  
pp. 389-396 ◽  
Author(s):  
Issa Mousaa ◽  
Hamdi Radi
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Natural Rubber ◽  
Metal Surface ◽  
Uv Irradiation ◽  
Corrosion Inhibitors ◽  
Epoxidized Natural Rubber ◽  
Coated Steel ◽  
Content Type ◽  
Coating Formulations

Purpose In the present work, under severe conditions of an inert atmosphere and high temperature, epoxidized natural rubber (ENR) with 25 per cent epoxidation level reacts with different aliphatic amine compounds such as ethyl amine (EA), propyl amine (PA) and butyl amine (BA) to prepare ENR/EA, ENR/PA, ENR/BA compounds as, respectively. The produced compounds were characterized by Fourier transform infrared spectroscopy and oxirane oxygen content determination. Different concentrations of the produced compounds were added to epoxy and urethane acrylate coating formulations to evaluate them as corrosion inhibitors for mild steel under UV irradiation. Corrosion resistance tests and weight loss measurements of the coated steel panels were made. It was found that coating formulations containing the prepared ENR/EA compound could protect metal surface from corrosion, and corrosion inhibitors efficiency of the prepared compounds were arranged as follows: ENR/EA > ENR/PA > ENR/BA. The optimum concentrations for all inhibitors which give the best inhibition efficiency for corrosion are 0.4-0.6 phr. Design/methodology/approach Corrosion scratch tests were carried out according to ASTM D 1,654-92 (2000). The weight loss of coated steel was measured according to ASTM D 2,688-94 (1999). The measurement of film hardness was carried out with a Wolff–Wilborn pencil hardness tester according to ASTM D 3,363 (2000). Findings It was found that coating formulations containing the prepared ENR/EA compound could protect metal surface from corrosion and corrosion inhibitors efficiency of the prepared compounds were arranged as follows: ENR/EA > ENR/PA > ENR/BA. The optimum concentrations for all inhibitors are 0.4-0.6 g/100g coating. Originality/value A highly efficient and economically corrosion inhibitors for mild steel were prepared from ENR and series of aliphatic amines.

Study on Corrosion Inhibition of Compound Corrosion Inhibitor of Molybdate in Seawater

2012 ◽  
Vol 581-582 ◽  
pp. 755-758
Author(s):  
Ying Li Wei ◽  
Ya Qiang Tian ◽  
Yue Hua Wang ◽  
Xiao Hong Yang
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Electrochemical Polarization ◽  
Quaternary Compound ◽  
Weight Loss Method ◽  
Loss Method ◽  
Inhibition Performance

The corrosion inhibition performance of molybdate and molybdate compound corrosion inhibitor of carbon steel in seawater were tested using weight loss method, electrochemical polarization curve, and the quaternary compound molybdate corrosion inhibitor were made sure through the experiments. The experiment results show that the compound corrosion inhibitors have obvious synergistic corrosion inhibition effects in the proportion of 40 mg/L molybdate, 10mg/L HEDP, 4mg/L Zn2+ and 50 mg/L glucose acid salts.

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