Pyrazolone derivatives as corrosion inhibitors for C-steel in hydrochloric acid solution

Fouda, Abd El‐Aziz S.; Al-Sarawy, A. A.; El-Katori, Emad E.

doi:10.1016/j.desal.2006.03.519

Cited by 219 publications

(88 citation statements)

References 14 publications

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“…The synergistic effect of these anions (Br -, SCN -and I -) has been observed [20].This effect depends on the type of anion. From the result it was found that the order of increasing inhibition efficiency in presence of these anions is KI>KSCN>KBr [21]. The strong chemisorptions of (Br -, SCN -and I -) anions on the metal surface is responsible for the synergistic effect of bromide, thiothynate and iodide anions in combination with cation of the inhibitor.…”

Section: Synergistic Effectmentioning

confidence: 83%

Thiazole derivatives as corrosion inhibitors for C-steel in sulphuric acid solution

2010

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KEYWORDS5-phenylazo-2-thioxo-thiazolidin-4-one and four of its derivatives have been investigated as corrosion inhibitors for C-steel in 1 M sulphuric acid solution using weight-loss and galvanostatic polarization techniques. The efficiency of the inhibitors increases with increase in inhibitor concentration but decreases with a rise in temperature. The conjoint effect of the thiazole derivatives and KBr, KSCN and KI has also been studied. The apparent activation energy (Ea*) and other thermodynamic parameters (ΔS*, ΔH* and ΔG*ads) for the corrosion process have also been calculated. The galvanostatic polarization data indicated that, the inhibitors were of mixed-type, but the cathode is more polarized than the anode. The slopes of the cathodic and anodic Tafel lines (ßc and ßa) are approximately constant and independent of the inhibitor concentration. The adsorption of these compounds on C-steel surface has been found to obey the Temkin's adsorption isotherm. The mechanism of inhibition was discussed in the light of the chemical structure of the undertaken inhibitors.Corrosion inhibitors C-steel Weight loss Synergistic effect Polarization Thiazole derivatives

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Section: Synergistic Effectmentioning

confidence: 83%

Thiazole derivatives as corrosion inhibitors for C-steel in sulphuric acid solution

2010

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“…In present case the shift in E corr value is +33 mV, indicating that these inhibitors are mixed type of inhibition. The value of β a and β c for fruit, leaf and stem inhibitors remains almost constant as compare to uninhibited solution indicates that inhibition process occurs without changing mechanism of corrosion reaction [33]. Thus inhibition process takes place only due to blocking of active -0.…”

Section: Electrochemical Measurement Eis Measurementsmentioning

confidence: 87%

Tribulus terrestris Extracts: An Eco-Friendly Corrosion Inhibitor for Mild Steel in H2SO4 Medium

Chaudhary¹,

Tak²

2017

Asian J. Chem.

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INTRODUCTIONThe use of mild steel in industries is due to its availability, good strength and comparatively low cost. The overall cost of metal is the total cost of itself plus its maintenance cost and it can be reduced by reducing the maintenance cost. The maintenance cost can be controlled and minimized. But presently in all countries, most of the industries are facing the problem of corrosion of mild steel in acidic medium [1]. It involves a significant cost expense for prevent or non-prevent of the metals. On the one hand if protection methods are not used, the maintenance and renovation cost will be increased due to many premature, unexpected and expensive failure in system. On the other hand, if protection methods are used, it involves the cost of corrosion prevention but protection of metal is a powerful tool to reduce the overall cost and liabilities of the system. The cost also increases due to high temperature and corrosive sulphur gases, surrounding chemical and petroleum industries in industrial areas. Cost of corrosion will escalate substantially during the next decade because of worldwide shortages of construction materials, higher energy costs, aggressive corrosion environment in coal conversion processes and other factors. In fact our economy would be drastically changed if there is no corrosion and appliances would not require coatings. However, corrosion rate can be controlled and minimized. Most of the methods reported in literature are not only expensive but also toxic in nature. Therefore, a great need to investigate a non-toxic replacement that is compatible with current industrial technologies with their availability and relatively low cost, naturally substances. The easily available plant Tribulus terrestris can be used as low-cost, eco-friendly corrosion inhibitor for mild steel in aggressive industrial environment. The inhibition efficiencies of different extracts (fruit, leaf and stem) in relation to the concentration of inhibitor and temperature were determined by mass loss method. Further electrochemical measurements (EIS and potentiodynamic polarization) were also done. Surface analysis was examined by scanning electron microscope. The adsorption process obeys Langmuir adsorption isotherm. All these analysis confirm that plant Tribulus terrestris has good properties to prevent the corrosion of mild steel in acidic medium.

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“…7 that the higher E a * values lead to the lower corrosion rate. This is due to the formation of a film on the SS surface serving as an energy barrier for the 304 SS corrosion [21]. Enthalpy and entropy of activation (ΔH * , ΔS * ) of the corrosion process were calculated from the transition state theory as given from eq.…”

Section: Kinetic -Thermodynamic Corrosion Parametersmentioning

confidence: 99%

Calotropis Procera plant extract as green corrosion inhibitor for 304 stainless steel in hydrochloric acid solution

Fouda¹,

El-Hossiany²,

Ramadan³

2017

Zas Mat

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Pyrazolone derivatives as corrosion inhibitors for C-steel in hydrochloric acid solution

Cited by 219 publications

References 14 publications

Thiazole derivatives as corrosion inhibitors for C-steel in sulphuric acid solution

Thiazole derivatives as corrosion inhibitors for C-steel in sulphuric acid solution

Tribulus terrestris Extracts: An Eco-Friendly Corrosion Inhibitor for Mild Steel in H2SO4 Medium

Calotropis Procera plant extract as green corrosion inhibitor for 304 stainless steel in hydrochloric acid solution

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