Crack growth behaviour of high strength aluminium alloy in 3.5%NaCl solution with corrosion inhibiting pigments

Liu, X.F; Huang, Sheng; Gu, Hai

doi:10.1016/s0142-1123(01)00188-8

Cited by 27 publications

(4 citation statements)

References 16 publications

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“…Subsequently, it mixes with inter-dendritic eutectic phases and hard insoluble intermetallic compounds. These microstructural features could degrade the mechanical properties of these materials and also increase the susceptibility to pitting corrosion damage, and limit their application in diverse potential fields [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Electrochemical Study: Pitting Corrosion Mechanism on A390 Al–Si Alloy and Ce–Mo Treatment as a Better Corrosion Protection

Herrera Hernández,

Mandujano Ruiz,

González Morán

et al. 2024

Materials

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Sulfuric acid anodizing assisted by a hydrothermal sealing with inhibitors [Ce3+-Mo6+] was used to prevent pitting corrosion on spray-deposited hypereutectic Al–Si alloy (A390). An investigation concerning the evaluation of pitting corrosion resistance on the anodic oxide thin film with ions incorporated was carried out in NaCl solution using electrochemical measurements (i.e., potentiodynamic polarization and electrochemical impedance spectroscopy, EIS). The influence of Si phase morphology and size on the growth mechanism of an anodic oxide film was characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results were then compared with those for its equivalent IM390 alloy (Al-17Si-4.5Cu-0.6Mg) produced through a conventional process ingot metallurgy, IM. The electrochemical findings indicate that sulfuric acid anodizing followed by a simple hot water sealing treatment was ineffective. In this manner, an intense attack was localized by pitting corrosion that occurred on the anodic oxide film in less than three days, as denoted by characteristic changes in the EIS spectra at the lowest frequencies. Improved results were achieved for Ce–Mo surface modification, which can provide better corrosion resistance on the aluminum alloys because no signs of pits were observed during the corrosion testing.

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Section: Introductionmentioning

confidence: 99%

Microstructural and Electrochemical Study: Pitting Corrosion Mechanism on A390 Al–Si Alloy and Ce–Mo Treatment as a Better Corrosion Protection

Herrera Hernández,

Mandujano Ruiz,

González Morán

et al. 2024

Materials

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“…Their resistance to corrosion is attributed to the rapidly formed stable oxide film. However, in the presence of aggressive anions, aluminium alloys are subjected to localized corrosion [2]. It is known that the presence of aggressive environment reduces the fatigue life and enhances the crack growth rate in structural aluminium alloys.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Crack Initiation and Growth Behavior of 7475 Aluminium Alloy in Air and Aggressive Environment

Verma¹,

Mallik²,

Atkinson

et al. 2012

AMR

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Present investigation is devoted to study the effects of aqueous solution of 3.5% NaCl on high-cycle stress life and fatigue crack growth behavior of 7475-T7351 alloy. At low alternating stress the environment test exhibited corrosion pit dominated crack initiation and at high stress level crack initiation occurred through anodic dissolution. Corrosive environment resulted reduction in fatigue life, crack growth rate enhancement and drop in stage-I to stage-II transition. The behavior is explained with the help of fractographic observations.

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“…These particles are inherent in the material. Investigations of the nucleation and the crack growth process in aluminum alloys have been extensively done [9][10][11][12][13][14][15][16][17][18][19][20] and the constituent particles are found to play an important role in the fatigue of aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

Role of extruded texture on fatigue crack growth in a high strength aluminum alloy thick-walled cylinder

et al. 2009

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In present study, as a basic step for modeling the fatigue behavior of an extruded Al alloy cylinder, the fatigue crack growth data of the alloy was collected in two orientations. Microstructural analysis revealed that the material had recrystallized grains and clusters of constituent particles aligned in the direction of extrusion. Fatigue life of the samples revealed a shorter fatigue life representing a higher fatigue crack growth rate in transverse direction. The Paris constants C and m were found to be 4 x 10 -11 and 3.4 for the transverse orientation. The same constants were found to be 2 x 10 -10 and 2.6 for the longitudinal direction. Post fracture analysis revealed that the topographical appearance of the fractured surfaces in two orientations was different. The mechanism of crack growth was the formation of striations. The present study revealed that the texture of the constituent particles created during extrusion process has a pronounced effect on the crack growth rate in two orientations.

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Crack growth behaviour of high strength aluminium alloy in 3.5%NaCl solution with corrosion inhibiting pigments

Cited by 27 publications

References 16 publications

Microstructural and Electrochemical Study: Pitting Corrosion Mechanism on A390 Al–Si Alloy and Ce–Mo Treatment as a Better Corrosion Protection

Microstructural and Electrochemical Study: Pitting Corrosion Mechanism on A390 Al–Si Alloy and Ce–Mo Treatment as a Better Corrosion Protection

Fatigue Crack Initiation and Growth Behavior of 7475 Aluminium Alloy in Air and Aggressive Environment

Role of extruded texture on fatigue crack growth in a high strength aluminum alloy thick-walled cylinder

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