Corrosion resistance of aluminum alloys

Sinyavskii, V. S.; Val'kov, V. D.; Budov, G. M.; Kalinin, V. D.

doi:10.1007/bf01166779

Cited by 4 publications

(6 citation statements)

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“…Neither phase composition and microchemical inhomogeniety, on the one hand, nor lattice defect density and dislocation structure, on the other, evolve to a significant degree. This phenomenon is widely discussed in the literature [32] for high-cycle fatigue. It is generally accepted that fatigue failure is the result of microcrack growth.…”

Section: Cyclic Fatigue Loading Leads To the Generation Ofmentioning

confidence: 86%

The evolution of electrochemical, microstructural, and mechanical properties of aluminium alloy 2024-T4 (D16AT) during fatigue cycling

Salimon

Korsunsky

2009

Proceedings of the Institution of Mechanical Engineers, Part G:

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Coupons of fuselage skin made from the aluminium alloy D16AT (the Russian equivalent of 2024-Ò4) were obtained from several Russian TU-154 passenger aircraft after different numbers of flight cycles and different lengths of operation. The coupons were subjected to electrochemical, microstructural, and mechanical testing with the aim of identifying any trends indicating fatigue damage accumulation and residual fatigue lifetime reduction during service. Alongside this investigation, laboratory fatigue test specimens were machined from the same alloy and subjected to cyclic fatigue loading to simulate the service conditions for the coupons. Electrochemical testing was used in order to determine the evolution of the corrosion potential of the near-surface layers. X-ray diffraction analysis was also carried out to characterize residual stress and texture evolution, while microstructural investigations were made using transmission electron microscopy (TEM), scanning electron microscopy (SEM), and secondary ion mass spectroscopy. The suitability of using electrochemical, microscopic, and diffraction characterization methods for the detection of surface structural state modification and its connection with the mechanical performance of this alloy are discussed.

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Section: Cyclic Fatigue Loading Leads To the Generation Ofmentioning

confidence: 86%

The evolution of electrochemical, microstructural, and mechanical properties of aluminium alloy 2024-T4 (D16AT) during fatigue cycling

Salimon

Korsunsky

2009

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…It is well known that the driving force for IGC is conditioned by the difference in electrochemical potentials on the border between the alloy matrix -aluminum solid solution, and intermetallic particles. Generally, the larger is a particle and the lesser is it coherency with the matrix, the higher is the difference of potentials [2,3]. Besides, it is well documented that the IGC depth and intensity are strongly dependent on the parameters of the alloy structure and phase composition, such as grain and subgrain size [4][5][6]; structure and fraction of high and lowangle boundaries [7][8][9][10][11][12]; nature, morphology and distribution of secondary phases [13][14][15]; width of precipitate free zones (PFZs) [16,17] and etc.…”

Section: Introductionmentioning

confidence: 99%

“…Such a processing of pure metals and alloys usually results in well-developed deformation structures, involving nanocrystalline (NC) structures, and could accompanied by enhancement of their strength, as also of a number (balance) of physical and mechanical properties [18][19][20][21]. Meanwhile, it should be noted, that cold deformation, even to conventional strains, ambiguously affects aluminum alloys IGC resistance [2,10]. The cause is that any deformation processing leads to simultaneous and multidirectional changes of structural and phase parameters, involving those, mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Effect of Zr on Structure and Resistance to Intergranular Corrosion of Severely Deformed 2024 Aluminum Alloy

Krymskiy

Ilyasov

Avtokratova

et al. 2019

JMNM

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Effects of severe plastic deformation by isothermal сryorolling with a strain of e~2 and subsequent natural and artificial aging on the structure and resistance to intergranular corrosion (IGC) of the preliminary quenched 2024 aluminum alloy of standard and Zr modified compositions were investigated. Increasing the temperature of aging leads to decreasing the alloy IGC resistance due to precipitation of more stable strengthening S-phase (Al2CuMg), rising difference of electrochemical potentials at grain and subgrain boundaries. Zr additions, оn the opposite, significantly increased the alloy IGC resistance in both naturally and artificially aged conditions, reducing its depth and intensity. The main structural factor, influencing the alloy corrosion behavior, is excess phases: their composition, volume fraction and distribution.

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“…It is shown that the addition of phosphate and nitrate inhibitors to an acid-rain solution decreases the difference between the free corrosion potential of the aluminum surface and its transient potential in the course of formation of passive films. It is discovered and proved that the phosphate-nitrate composition exerts a synergistic anticorrosion effect on the mechanically activated aluminum surface.Aluminum and its alloys are characterized by a quite high corrosion resistance in working media, which explains their extensive application in various branches of industry; in particular, in chemical, automotive, food, and aircraft industries [1]. The oxide films formed on the surfaces of these metals serves as reliable protection against the influence of corrosive media.…”

mentioning

confidence: 99%

“…Aluminum and its alloys are characterized by a quite high corrosion resistance in working media, which explains their extensive application in various branches of industry; in particular, in chemical, automotive, food, and aircraft industries [1]. The oxide films formed on the surfaces of these metals serves as reliable protection against the influence of corrosive media.…”

mentioning

confidence: 99%

Repassivation of Aluminum in the Presence of Phosphate and Nitrate Inhibitors in Corrosive Media

Zin¹,

Khlopyk²

2015

Mater Sci

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We study the efficiency of inhibition of the corrosion of aluminum in the stage of repassivation after the destruction of the surface oxide film. It is shown that the addition of phosphate and nitrate inhibitors to an acid-rain solution decreases the difference between the free corrosion potential of the aluminum surface and its transient potential in the course of formation of passive films. It is discovered and proved that the phosphate-nitrate composition exerts a synergistic anticorrosion effect on the mechanically activated aluminum surface.Aluminum and its alloys are characterized by a quite high corrosion resistance in working media, which explains their extensive application in various branches of industry; in particular, in chemical, automotive, food, and aircraft industries [1]. The oxide films formed on the surfaces of these metals serves as reliable protection against the influence of corrosive media. However, in many cases, these surface films can be mechanically destroyed in the course of operation and, as a result, the corrosion rate of aluminum and its alloys becomes several tens times higher [2][3][4]. At present, the regularities of corrosion inhibition of aluminum and aluminum alloys by different organic and inorganic compounds are thoroughly investigated under the conditions of integrity of their oxide films [5][6][7][8][9]. However, it is also necessary to find corrosion inhibitors that would be efficient in the stage of repassivation of aluminum and its alloys, i.e., in the absence of continuous passive films on their surfaces. As shown in [10], phosphate inhibitors can be promising for the protection of D16 aluminum alloy against tribocorrosion when the oxide film formed on the metal surface is cyclically destroyed. At the same time, it is known that one can enhance the protective action of phosphate by combining it with the other inhibitors and, in particular, with sodium nitrate [11] or nitrite [12]. The anodic oxidation and passivation of the mechanically activated surfaces of aluminum alloys in nitrate solutions was observed in [13]. These facts can be important for the improvement of the protective action of phosphate inhibitors in the case where the oxide film formed on the aluminum alloy is mechanically damaged. Hence, the aim of the present work is to investigate the protective action of compositions based on the phosphate and nitrate corrosion inhibitors in the stage of repassivation of pure aluminum (used in our investigation as a model material). Materials and Methods of InvestigationsWe study the efficiency of corrosion inhibitors in the stage of aluminum repassivation in a special guillotining device according to the procedure described in [14].

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Corrosion resistance of aluminum alloys

Cited by 4 publications

References 0 publications

The evolution of electrochemical, microstructural, and mechanical properties of aluminium alloy 2024-T4 (D16AT) during fatigue cycling

The evolution of electrochemical, microstructural, and mechanical properties of aluminium alloy 2024-T4 (D16AT) during fatigue cycling

Effect of Zr on Structure and Resistance to Intergranular Corrosion of Severely Deformed 2024 Aluminum Alloy

Repassivation of Aluminum in the Presence of Phosphate and Nitrate Inhibitors in Corrosive Media

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