Citric acid as corrosion inhibitor for aluminium pigment

Müller, Bodo

doi:10.1016/s0010-938x(03)00191-4

Cited by 87 publications

(45 citation statements)

References 13 publications

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“…The reaction basin was placed in a thermostated water bath maintained at constant temperature 303, 313, 323 and 333 ± 1 K. The test coupons of Fe6956 were suspended with suitable glass hooks about 1 cm below the surface of the corrosive solution [16]. After three hours, the coupons were retrieved washed by immersion in distilled water, scrubbed with bristle brush, cleaned with ethanol, dried in acetone and further air dried and reweighed [17].…”

Section: Weight Loss Measurementmentioning

confidence: 99%

Corrosion Studies on Stainless Steel (FE6956) in Hydrochloric Acid Solution

Oguike¹

2014

AMPC

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The effect of hydrochloric acid concentration on stainless steel (Fe6956) at temperature range 303 -333 ± 1 K has been studied using weight loss, thermometric and electrochemical polarization techniques. The corrosion rate of the stainless steel was found to be dependent on both temperature variation and acid concentration. The potentiostatic study showed that the active passive transition depends strongly on acid concentration while the weight loss measurements revealed that 2 M HCl at temperature 333 K had an appreciable corrosion rate which corresponds to 14.04 × 10 −3 reaction number (RN) got from thermometric monitoring. Arrhenius equation and transition state theory were used to calculate kinetic and thermodynamic parameter such as Ea, ∆H* and ∆S*. Results obtained showed that corrosion reaction of Fe6956 in HCl is spontaneous and there is good agreement between the data got from the techniques employed.

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Section: Weight Loss Measurementmentioning

confidence: 99%

Corrosion Studies on Stainless Steel (FE6956) in Hydrochloric Acid Solution

Oguike¹

2014

AMPC

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“…This period has been referred to by various names such as induction period or incubation period (Oguzie, 2008) or latency period (Muller, 1999) and represents the time required by the solution to neutralize the pre-immersion oxide coating on the aluminium pigment surface. Other authors (Muller, 1999(Muller, , 2004 had obtained similar pH-dependencies in the latency periods using similar techniques and other corrosion inhibitors for aluminium and this effect was attributed to the influence of isoelectric point (IEP) pH of aluminium (pH 9) (Harman, 1994). At pH 8 (below the (IEP)) the aluminium surface is positively charged, whereas at pH 10 (above the (IEP)) the surface is negatively charged and here we are considering an aqueous solution containing other ions.…”

Section: The Aluminium Pigmentsmentioning

confidence: 80%

“…For coatings based on aluminium pigments, replacing the organic solvent by water however poses a considerable challenge. This is because under the slightly alkaline conditions in which most water-borne paints exist, aluminium reacts with water to form aluminium oxide and aluminium hydroxide according to the scheme (Karlson, 2006;Lui et al, 2007;Kiehl et al, 1999;Muller et al, 2001a;Muller, 2004 …”

Section: Introductionmentioning

confidence: 99%

Corrosion Inhibition of Aluminium Pigments in Aqueous Alkaline Medium Using Plant Extracts

Akalezi¹,

Enenebeaku²,

Ogukwe³

et al. 2012

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This work examines the efficacy and efficiency of Bucolzia coriacea (BC) and Cninodoscolus chayansa (CC) plants extracts as corrosion inhibitors for aluminium pigments using gas volumetric technique. The results obtained from this study indicate that all the extracts inhibited the corrosion process by extending the latency periods of the aluminium pigment-extract mix far beyond that of the bare aluminium pigment. Inhibition efficiency obtained was not only concentration dependent but also plant dependent and followed the order: BC>CC. A linear correlation was obtained between inhibition efficiency and duration of latency for each extract. Molecular modeling was used to evaluate the structure, electronic reactive parameters of the plant extracts in relation to their effectiveness as corrosion inhibitors.

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“…In the same time, the Al-citrates are quite interesting from a very different point of view. Such citrates seem to play an important role in the prevention of the corrosion of Al-pigments [12]. Similar complexes, probably with glycolic acid formed in EG-water automotive engine coolants might be of significance for the corrosion of the modern Al-alloys made car engines.…”

Section: Introductionmentioning

confidence: 93%

Synthesis and characterization of Al-and Y-Al-citrates as potential precursors for YAlO3

et al. 2006

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Al-and Y-Al-citric complexes have been synthesized in ethylene glycol medium at conditions close to the ones used in polymerized complex method and their composition and spectral characteristics have been studied. Proofs have been found for the formation in the bimetallic system of a mixed-metal Al-Y-complex. Doubly ionized and esterified ligands take place in the Al-complex. All of the ligands forming Y-Al-complex are mono-or doubly esterified. Deprotonation of the alcoholic group takes place in the formation of the mixed-metal complex. Both complexes contain adduct-bonded ethylene glycol. Heating of the bimetallic complex or of the polyester resin formed leads to not phase-homogeneous YAlO 3 -along with cubic YAlO 3 , its orthorhombic modification as well as Y 4 Al l2 O 9 are found by X-ray diffractometry.

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Citric acid as corrosion inhibitor for aluminium pigment

Cited by 87 publications

References 13 publications

Corrosion Studies on Stainless Steel (FE6956) in Hydrochloric Acid Solution

Corrosion Studies on Stainless Steel (FE6956) in Hydrochloric Acid Solution

Corrosion Inhibition of Aluminium Pigments in Aqueous Alkaline Medium Using Plant Extracts

Synthesis and characterization of Al-and Y-Al-citrates as potential precursors for YAlO3

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