Corrosion and corrosion-fatigue synergism on the base metal and nugget zone of the 2524-T3 Al alloy joined by FSW process

Moreto, Jéferson Aparecido; Santos, Marinna Silva; Ferreira, M.O.A.; Carvalho, G.S.; Gelamo, Rogério Valentim; Aoki, Idalina Vieira; Taryba, Maryna; Filho, Waldek Wladimir Bose; Fernandes, João

doi:10.1016/j.corsci.2021.109253

Cited by 47 publications

(9 citation statements)

References 54 publications

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“…After 1-hour at open circuit, EIS tests started using a frequency of 100 kHz to 10 mHz, and a sinusoidal perturbation of 10 mVrms around -20 mV vs OCP. Non-linear behavior was found for some Al-alloys at anodic portion of the AC perturbation when tested after early stages of immersion in sodium chloride solution [23], so taken an cathodic potential of -20 mV vs OCP has been reported as effective to ensure linearity, as further validated in [24][25][26]. Following the EIS testing, the samples were exposed to an open circuit condition for 10 minutes to ensure that the corroding system could attain the potential values range prior to EIS.…”

Section: Methodsmentioning

confidence: 83%

Corrosion Resistance of Fe-Contaminated Al-Si-CU-Zn Alloys Modified With NI and Co and with Variable Secondary Dendrite Arm Spacing

Xavier¹,

Freitas²,

Koga³

et al. 2022

Preprint

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The corrosion behavior of Fe-containing directionally solidified (DS) and centrifugally cast (CC) Al-Si-Cu-Zn alloys with either Co or Ni additions has been investigated. Electrochemical and immersion corrosion methods were used to investigate the corrosion behavior in 0.6 M NaCl after short (1-hour) and long (30-day) exposure periods. The employed solidification methods allowed the production of samples with a wide range of secondary dendrite arm spacing (SDAS) while preserving Si and Fe-containing phases. The 0.5 wt.% Ni and Co additions led to the growth of the AlFeSi(Ni) and AlFeSi(Co) phases, but no binary AlNi nor AlCo intermetallic par-ticles have been generated. Potentiodynamic polarization studies at early exposure revealed an increase in the corrosion potential as the Ni was added for either fast or slow solidified samples. The electrochemical impedance spectroscopy at early exposure demonstrated that the Ni-modified alloy, on the other hand, was associated to smaller charge transfer resistances, in-dicating a reduction in corrosion resistance after short elapsed time into the electrolyte. Howev-er, 30-day immersion tests revealed much lower corrosion rate of the Ni-modified alloy than the other alloys, while the corrosion rates of the Co-modified and non-modified alloys were simi-lar. In the Ni-containing alloy, decreased corrosion rate under long-term corrosion process was attributed to the formation of a thick and dense alumina layer, effectively protecting the surface under such conditions. This work contributes to a better knowledge of the corrosion behavior of Ni- and Co-corrected Al industrial scrap compositions.

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Section: Methodsmentioning

confidence: 83%

Corrosion Resistance of Fe-Contaminated Al-Si-CU-Zn Alloys Modified With NI and Co and with Variable Secondary Dendrite Arm Spacing

Xavier¹,

Freitas²,

Koga³

et al. 2022

Preprint

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“…The EIS results for both alloys were fitted with the two/three-time constants equivalent electric circuits (EEC) shown in Figure 7. These ECC have been established in the literature on aluminium alloys EIS fittings and were also tested in previous works from our research group [9,[44][45][46]. Table 4 presents the parameters obtained from the equivalent electrical circuit fitted to the AA2024-T3 and AA2524-T3 EIS data.…”

Section: Resultsmentioning

confidence: 99%

Comparison of Corrosion Resistance of the AA2524-T3 and the AA2024-T3

Queiroz

Terada

Bugarin

et al. 2021

Metals

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The 2XXX Al alloys are characterized by their superior mechanical properties resulting from alloying elements and precipitation hardening treatments. The AA2524-T3 alloy was developed to replace the AA2024-T3 alloy in the aerospace industry. However, both alloys present many intermetallic particles (IMCs) in their microstructure, and this is the main reason for their high susceptibility to localized corrosion (such as pitting and stress corrosion cracking). Despite the similarities between these alloys (e.g., chemical composition and type of intermetallics) the literature comparing their properties is scarce and focuses mainly on their mechanical properties, not their corrosion resistances. In this investigation, the corrosion resistance of the AA2524-T3 alloy was compared to the AA2024-T3 alloy. The microstructure of both alloys was analyzed by Scanning Electron Microscopy before and after immersion in the test electrolyte, and the number and area fraction of intermetallics of each alloy was determined. The corrosion resistance of both alloys was monitored as a function of exposure time by electrochemical impedance spectroscopy and the results were fitted using electrical equivalent circuits. The AA2524-T3 alloy presented not only higher impedance values but also less corroded areas than the AA2024-T3 alloy.

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Section: Introductionmentioning

confidence: 99%

“…Aluminum (Al) alloy materials are indispensable in the industrial field due to their high strength, low density, and good processing performance, which are widely used in various fields such as electronic engineering, petrochemical engineering, and aerospace. − However, corrosion occurs when all alloy materials are exposed to the atmosphere, seawater, soil, and other media, resulting in equipment damage and huge economic losses. − Al has high electrochemical activity, and Al alloys are easy to be corroded in many application environments, especially in chloride solutions, which seriously restricts their promotion and applications in various fields. , Therefore, how to effectively reduce the surface corrosion of materials has become an important issue in the surface treatment of Al alloy materials. − …”

Section: Introductionmentioning

confidence: 99%

“…5−9 Al has high electrochemical activity, and Al alloys are easy to be corroded in many application environments, especially in chloride solutions, which seriously restricts their promotion and applications in various fields. 10,11 Therefore, how to effectively reduce the surface corrosion of materials has become an important issue in the surface treatment of Al alloy materials. 12−14 In recent years, with the in-depth study of superhydrophobic surfaces (SHSs), scholars have found that metal materials with special wettability are of great significance in the field of corrosion protection.…”

Section: Introductionmentioning

confidence: 99%

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Laser-Induced Slippery Liquid-Infused Surfaces with Anticorrosion and Wear Resistance Properties on Aluminum Alloy Substrates

Cai

Lian

et al. 2022

ACS Omega

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Slippery liquid-infused surfaces (SLISs) are developed as a potential alternative to superhydrophobic surfaces (SHSs) to resolve the issues of poor durability in corrosion protection and wear resistance. In this work, we used a simple laser processing technology to prepare a SLIS on the aluminum alloy (7075) surface. The superhydrophobicities of the modified surface and the oil film formed by liquid injection make the corrosive medium difficult to directly contact the surface and thus have a significant effect on corrosion resistance. The water and oil repellent SLIS exhibits durable corrosion resistance and excellent tribological properties compared with the SHS. The anticorrosion and wear resistance performances provided by the composite film have been assessed by multiple methods including the electrochemical test, immersion test, and friction wear test. The results indicate that compared to the bare surface, laser-ablated surface (LAS), and fluoroalkyl silane-modified SHS, the SLIS composite coating has better corrosion resistance and wear resistance, which is of great significance to expand the potential applications of 7075 aluminum alloys. The work provides a research basis for expanding the practical application of SLISs in complex environments.

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Corrosion and corrosion-fatigue synergism on the base metal and nugget zone of the 2524-T3 Al alloy joined by FSW process

Cited by 47 publications

References 54 publications

Corrosion Resistance of Fe-Contaminated Al-Si-CU-Zn Alloys Modified With NI and Co and with Variable Secondary Dendrite Arm Spacing

Corrosion Resistance of Fe-Contaminated Al-Si-CU-Zn Alloys Modified With NI and Co and with Variable Secondary Dendrite Arm Spacing

Comparison of Corrosion Resistance of the AA2524-T3 and the AA2024-T3

Laser-Induced Slippery Liquid-Infused Surfaces with Anticorrosion and Wear Resistance Properties on Aluminum Alloy Substrates

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