Corrosion inhibition of aluminum alloy in H3PO4 solution using para-thiazolidinone derivatives

Fouda, A. S.; El-Sherbiny, M. F.; Motawea, M. M.

doi:10.5004/dwt.2011.1997

Cited by 11 publications

(3 citation statements)

References 27 publications

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“…Fouda et al 161 synthesised five p-thiazolidinone derivatives, i.e. 5(-4-nitrophenylazo)-3phenylamino-2-thioxo-4-thiazolidinone (compound 1), 5(-4-chlorophenylazo)-3-phenylamino-2-thioxo-4thiazolidinone (compound 2), 5(-4-hydrophenylazo)-3-phenylamino-2-thioxo-4-thiazolidinone (compound 3), 5(-4-methylphenylazo)-3-phenylamino-2-thioxo-4-thiazolidinone (compound 4), and 5(-4methoxyphenylazo)-3-phenylamino-2-thioxo-4-thiazolidinone (compound 5), and tested them as corrosion inhibitors for 99.47% aluminium in 3 M H 3 PO 4 solution at 30 °C, using the WL and GSP techniques.…”

Section: Organic Corrosion Inhibitors In H 3 Po 4 Solutionmentioning

confidence: 99%

Organic corrosion inhibitors for aluminium and its alloys in acid solutions: a review

2016

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The aim of this review is to summarise the research work published in the last two decades on the use of organic compounds as corrosion inhibitors for aluminium and its alloys in acidic solutions. The focus is on HCl and H 2 SO 4 solutions due to their extensive use in different applications, such as chemical and electrochemical etching, acid cleaning, anodising, and acid pickling of aluminium. Other acids are also reviewed. The inhibition effectiveness of numerous organic compounds and their possible inhibition type and mechanism are also discussed. Electrochemistry is mainly used to investigate inhibitor performance. permanent contact of aluminium (or an alloy of aluminium) with a certain solution. This type of corrosion is especially frequent in chloride solutions. Corrosion protectionThere are several methods to protect aluminium and its alloys, among which the anodising process, conversion coatings, paints, organic coatings, and corrosion inhibitors are found to be the most effective.Anodising is an electrochemical process to increase the thickness of aluminium oxide, where aluminium metallic material is connected as an anode in the electrolytic cell. The anodised oxide layer is thus thicker (5-30 μm) than the natural oxide layer 2, 3, 10, 13, 14 .Conversion coating consist of poorly soluble phosphate or chromium oxides, which are tightly bound to the surface of aluminium or its alloys 15-17 . These coatings affect the appearance, corrosion potential, electrical resistance, and other surface properties. Conversion coatings are formed via a chemical oxidation-reduction process on the metal surface. However, the drawback of these coatings and the accompanying procedures is their negative environmental impact 2 . Therefore, in recent years increasing interest has been shown in conversion coatings containing cerium 18-23 and metallic ions 24-28 or their combination 29, 30 .As mentioned above, another method of corrosion protection is to employ organic coatings. Before applying the organic coating, the aluminium surface should be cleaned and prepared. The process consists of degreasing the surface, followed by removal of the existing oxide layer and the application of the base layer and the primer. The surface cleaning and treatment influences the adhesion and anticorrosion properties of these coatings 31, 32 . The final layer is selected depending on the environmental conditions in which the product will be used [33][34][35][36] . The use of organic-inorganic coatings in the protection of aluminium and its alloys has been also studied 37-39 . Corrosion inhibitorsCorrosion inhibitors modify the metal surface either by forming insoluble compounds with aluminium or by forming a protective surface layer. Based on the electrochemical mechanism of action, the inhibitors can be classified as mixed-type inhibitors (inhibiting both cathodic and anodic reactions of the corrosion couple), anodic-type inhibitors (inhibiting the anodic reaction), or cathodic-type inhibitors (inhibiting the cathodic reaction). Inhibitors may ...

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Section: Organic Corrosion Inhibitors In H 3 Po 4 Solutionmentioning

confidence: 99%

Organic corrosion inhibitors for aluminium and its alloys in acid solutions: a review

2016

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“…Zhang et al 26) reported the synergistic effect of iodide ions on the efficiency of benzotriazole. Fouda et al 27) also reported the synergistic effect of some anions on the inhibition efficiency of p-thiazolidinone derivatives.…”

Section: Introductionmentioning

confidence: 97%

Role of Some Benzohydrazide Derivatives as Corrosion Inhibitors for Carbon Steel in HCl Solution

Fouda¹,

Mohamed²,

Soltan³

2013

J. Electrochem. Sci. Technol

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Corrosion inhibition of carbon steel in 2 M HCl by some benzohydrazide derivatives (I-III) was studied using weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) techniques at 30°C. Polarization studies showed that all the investigated compounds are of mixed type inhibitors. Temperature studies revealed a decrease in efficiency with rise in temperature and corrosion activation energies increased in the presence of the hydrazide derivatives, probably implying that physical adsorption of cationic species may be responsible for the observed inhibition behavior. Electrochemical impedance studies showed that the presence of benzohydrazide derivatives decreases the double layer capacitance and increases the charge transfer resistance. The adsorption of these compounds on carbon steel surface was found to obey Temkin's adsorption isotherm. Synergistic effects increased the inhibition efficiency in the presence of halide additives namely KI and KBr. An inhibition mechanism was proposed in terms of strongly adsorption of inhibitor molecules on carbon steel surface.

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“…The use of chemicals as corrosion inhibitors (CIs) is one of the most popular and efficient methods to protect metals; this is a convenient and relatively inexpensive method to achieve this goal [ 10 , 11 , 12 , 13 ]. Organic compounds are commonly used as CIs in industry, such as those having π electrons in structure and containing nitrogen, sulfur, phosphorus and oxygen atoms, through which they are adsorbed on the metal surface [ 14 , 15 , 16 , 17 , 18 , 19 ]. The adsorption is influenced by the electronic structure of the inhibiting molecules [ 20 ] and also by steric factors, aromaticity, electron density at the donor atoms and the presence of functional groups [ 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

The Inhibition of Aluminum Corrosion in Sulfuric Acid by Poly(1-vinyl-3-alkyl-imidazolium Hexafluorophosphate)

et al. 2014

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Compounds of poly(ionic liquid)s (PILs), derived from imidazole with different alkylic chain lengths located in the third position of the imidazolium ring (poly(1-vinyl-3-dodecyl-imidazolium) (PImC12), poly(1-vinyl-3-octylimidazolium) (PImC8) and poly(1-vinyl-3-butylimidazolium) (PImC4) hexafluorophosphate) were synthesized. These compounds were tested as corrosion inhibitors on aluminum alloy AA6061 in diluted sulfuric acid (0.1–1 M H2SO4) by weight loss tests, polarization resistance measurements and inductively coupled plasma optical emission spectroscopy. Langmuir’s isotherms suggested film formation on bare alloy while standard free energy indicated inhibition by a physisorption process. However, compound efficiencies as inhibitors ranked low (PImC12 > PImC8 > PImC4) to reach 61% for PImC12 in highly diluted acidic solution. Apparently, the high mobility of sulfates favored their adsorption in comparison to PILs. The surface film displayed general corrosion, and pitting occurred as a consequence of PILs’ partial inhibition along with a continuous dissolution of defective patchy film on formation. A slight improvement in efficiency was displayed by compounds having high molecular weight and a long alkyl chain, as a consequence of steric hindrance and PIL interactions.

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Corrosion inhibition of aluminum alloy in H3PO4 solution using para-thiazolidinone derivatives

Cited by 11 publications

References 27 publications

Organic corrosion inhibitors for aluminium and its alloys in acid solutions: a review

Organic corrosion inhibitors for aluminium and its alloys in acid solutions: a review

Role of Some Benzohydrazide Derivatives as Corrosion Inhibitors for Carbon Steel in HCl Solution

The Inhibition of Aluminum Corrosion in Sulfuric Acid by Poly(1-vinyl-3-alkyl-imidazolium Hexafluorophosphate)

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