Electrochemical impedance study on the corrosion of Al-Pure in hydrochloric acid solution using Schiff bases

Patel, A. S.; Panchal, V.A.; Shah, Nisha K.

doi:10.1007/s12034-012-0270-1

Cited by 21 publications

(7 citation statements)

References 29 publications

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“…The final polishing was done using jeweler's rouge, which gave a mirror-like finish. The specimens were degreased by A.R carbon tetrachloride (sulphur free), washed thoroughly with double distilled water followed by drying in warm air and then stored in moisture-free desiccators prior to use for the weight loss measurement [29].…”

Section: Specimen Preparationmentioning

confidence: 99%

Electrochemical and theoretical investigation of the inhibitory effect of two Schiff bases of benzaldehyde for the corrosion of aluminium in hydrochloric acid

Naik¹,

Jha

Lone

et al. 2016

Journal of Molecular Structure

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Section: Specimen Preparationmentioning

confidence: 99%

Electrochemical and theoretical investigation of the inhibitory effect of two Schiff bases of benzaldehyde for the corrosion of aluminium in hydrochloric acid

Naik¹,

Jha

Lone

et al. 2016

Journal of Molecular Structure

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“…Patel et al 102 tested two newly synthesised Schiff bases, i.e. N-benzylidene benzylamine and benzenemethanamine-α-methyl-N-(phenylmethylene), as corrosion inhibitors for pure aluminium in 1 M HCl solution at 35-65 °C, using the GSP and EIS.…”

Section: Organic Corrosion Inhibitors In Hcl Solutionmentioning

confidence: 99%

“…monooleate, in the corrosion of two types of aluminium (containing 97.5% and 92.25% aluminium, respectively) in 1 M HCl solution, using the WL technique. The authors reported a mixed adsorption mechanism (chemisorption and physisorption) based on the thermodynamic calculations.Noor[102] studied the inhibition action of 1-methyl-4-[4'(-H)-styryl] pyridinium iodide, 1-methyl-4-[4'(-Cl)-styryl] pyridinium iodide and 1-methyl-4-[4'(-H)-styryl] pyridinium iodide in the corrosion of 94.44% aluminium in 0.5 M HCl solution at 30-70 °C, using the WL, PDP, and EIS techniques. An increase in temperature enhances the corrosion process.Muniandy et al97 synthesised three Schiff bases, i.e.…”

mentioning

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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“…Assuming that the inhibitors adsorbed on the alloy surface decrease the surface available for cathodic and anodic reactions to take place. The nitrogen atoms of the Schiff bases act as the reaction centers (polar function) because of its higher electron density resulting in the formation of a monolayer on the metal surface [22,23] . It is generally assumed that the adsorption of the inhibitors on the metal surface is an essential step in the inhibition mechanism [24] .…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Corrosion Inhibition of Aa6061 and Aa6063 Alloy in Hydrochloric Acid Media by Schiff Base Compounds

Fakrudeen¹,

C²,

Raju³

2012

J. Chil. Chem. Soc.

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N, N'-bis (Salicylidene)-1, 4-Diaminophenelyne (SDP) and N, N'-bis (3-Methoxy Salicylidene)-1, 4 Diaminophenelyne (MSDP) were synthesized, and their molecular structure were determined by FT-IR and 1 H NMR. The corrosion inhibitions of these compounds on AA6061 in 1M Hydrochloric acid were evaluated by weight loss method and scanning electron microscopic technique. The weight loss study showed that the inhibition efficiency of these compounds increases with increase in concentration and vary with solution temperature and immersion time. The various thermodynamic parameters were also calculated to investigate the mechanism of corrosion inhibition. The effectiveness of these inhibitors were in the order of MSDP> MDP. The adsorption of Schiff bases on AA6061and AA6063 alloy surface in acid obeyed Freundlich adsorption isotherm. The surface characteristics of inhibited and uninhibited alloy samples were investigated by scanning electron microscopy (SEM).

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Electrochemical impedance study on the corrosion of Al-Pure in hydrochloric acid solution using Schiff bases

Cited by 21 publications

References 29 publications

Electrochemical and theoretical investigation of the inhibitory effect of two Schiff bases of benzaldehyde for the corrosion of aluminium in hydrochloric acid

Electrochemical and theoretical investigation of the inhibitory effect of two Schiff bases of benzaldehyde for the corrosion of aluminium in hydrochloric acid

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

Corrosion Inhibition of Aa6061 and Aa6063 Alloy in Hydrochloric Acid Media by Schiff Base Compounds

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