Inhibition and Acceleration of Aluminum Corrosion

Samuels, B.; Sotoudeh, Kasra; Foley, R. T.

doi:10.5006/1.3593852

Cited by 59 publications

(16 citation statements)

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“…In this connection, the present optimal chain length (6 ≤ n ≤ 10). It has been shown that inhibitive properties of monocarboxylates toward alloys I and II pitting corrosion in neutral, saline solutions are largely dependent on their affinity for the adsorption sites on the metal oxide, oxychloride, hydride surface and their ability to displace Cl -ions [20]. The moderate change of E pit and induction period to carbon length for n < 6 indicated that this affinity changed moderately for these species.…”

Section: Resultsmentioning

confidence: 99%

“…It is possible that the formation of such bilayers has been responsible for the sudden rise in I% observed for monocarboxylates with alloys I and II. From the standpoint of pitting inhibition [20], the need of Cl -to averse two negatively charged sheets and hydrophobic layer of considerable thickness might explain the exceptional inhibiting properties of the higer monocarboxylates for very long chain length monocarboxylates (n=11, 12, 13).…”

Section: Resultsmentioning

confidence: 99%

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Pitting Corrosion Inhibition of Some Copper Alloys in Neutral Solutions by Straight Chain Carboxylates

Mahmoud¹,

Ahmed²,

Marie³

et al. 2007

Port. Electrochim. Acta

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Electrochemical methods were used to investigate the abilities of the homologous straight chain monocarboxylates (C n H 2n+1 COO -,n=1-13) to inhibit the pitting corrosion of two types of copper alloys in aerated, saline and near neutral aqueous solutions. The copper alloys were alloy (I) (Cu + 4.47% Fe) and alloy (II) (Cu + 10.67% Al + 5.02% Fe). It was found that these were susceptible to pitting corrosion in NaCl solutions, with increase of Cl -ions concentration. Alloy (II) was more susceptible to pitting corrosion than alloy (I). The performance of monocarboxylates was shown to be critically dependent upon their chain length. The range of chain lengths producing optimal inhibition was (6 ≤ n ≤ 10). These carboxylates showed abrupt decreases in inhibitor ability outside the optimal range. The dramatic variations in inhibition efficiencies probably resulted from competing reactions such as adsorption, solubility and micelle formation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Pitting Corrosion Inhibition of Some Copper Alloys in Neutral Solutions by Straight Chain Carboxylates

Mahmoud¹,

Ahmed²,

Marie³

et al. 2007

Port. Electrochim. Acta

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“…The corrosion inhibition provided by SO 2À 4 -ions in slightly alkaline solutions was proposed to result from an adsorption mechanism [21]. For the alloy 2024-T3, nitrate was found to be an effective inhibitor in high concentrations, but it caused accelerated corrosion in certain Cl À /NO À 3 ratios [20]. The increase in corrosion rate might be associated with the reduction of the nitrate to ammonia by elemental aluminium in alkaline solutions [22].…”

Section: Discussionmentioning

confidence: 99%

Effects of nonhalide anions on the stress corrosion cracking behaviour of alloy 7475 in the tempers T651 and T7351

Braun

2000

Materials and Corrosion

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“…The acidity can prevent the re-passivation process facilitating pitting. Besides, in the acid solutions, pitting can be accomplished by the formation of soluble complexes between the organic acid anions and the aluminum cations, thus increasing the dissolution rate [34]. Moreover, another investigation also reported an increase of the pitting potential of aluminum in presence of chloride solutions as the acetate concentration increases [35].…”

Section: Organic Acidsmentioning

confidence: 99%

Microbiologically Influenced Corrosion in Aluminium Alloys 7075 and 2024

Nelson¹,

Maria²,

Mamiè³

et al. 2017

Aluminium Alloys - Recent Trends in Processing, Characterization, Mechanical Behavior and Applications

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Aluminum and its alloys are central materials for the aircraft industry. Aluminum alloys (AA) 7075 and 2024 are widely used both in the structures and in brittle sections of the airplanes. The presence of the alloying elements in these metals makes them susceptible to localized corrosion at the same time vulnerable to bacterial attachment. A great number of reports on aircraft deterioration are related to microbial growth by contamination inside fuel storage tanks and aircraft wing tanks; this phenomenon is known as microbiologically influenced corrosion (MIC). As expected, corrosion and biocorrosion increase maintenance costs and time of the aircraft in the hangar. Therefore, the growing interest is to shed light on these issues and develop future inhibition methods. In this chapter, we will give an overview of microbiologically influenced corrosion associated with AA 2024 and 7075 by consortia and bacteria. Three mechanisms of biocorrosion in aluminium alloys have been described. In addition, some alternatives methods to battle the effect of biocorrosion will be shown, these methods are based on green compound which blocking of attached of bacteria and promote the detachment of biofilm, being these a tendency of the last innovation way to inhibit this kind of phenomenon.

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Inhibition and Acceleration of Aluminum Corrosion

Cited by 59 publications

References 0 publications

Pitting Corrosion Inhibition of Some Copper Alloys in Neutral Solutions by Straight Chain Carboxylates

Pitting Corrosion Inhibition of Some Copper Alloys in Neutral Solutions by Straight Chain Carboxylates

Effects of nonhalide anions on the stress corrosion cracking behaviour of alloy 7475 in the tempers T651 and T7351

Microbiologically Influenced Corrosion in Aluminium Alloys 7075 and 2024

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