Size-dependent role of S phase in pitting initiation of 2024Al alloy

Wang, J.; Zhang, B.; Wu, Bisheng; Ma, Xiang

doi:10.1016/j.corsci.2016.01.016

Cited by 68 publications

(18 citation statements)

References 24 publications

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“…However, in this case outward diffusion of Cu along with Mn from the core towards the clad promoted precipitation of Al(Fe,Mn,Cu)Si based precipitates (see Table 3) [55][56][57][58]. This resulted in depletion of Cu and Mn as solute in the Al matrix in the core material for the reference sheets.…”

Section: Figurementioning

confidence: 96%

Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers

et al. 2018

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Section: Figurementioning

confidence: 96%

Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers

et al. 2018

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“…While only large S precipitations were observed in samples with smaller strain (Figure 3a). According to some previous studies [31,38], it is found that there is a critical size in Al-Cu-Mg alloy below which the S phase is free of corrosion due to the coverage of the oxide film. Therefore, the corrosion resistance of the smaller strain samples, which mainly contains the undissolved large size S phase, is poor.…”

Section: Analysis Of Corrosion Resultsmentioning

confidence: 99%

“…Therefore, the large particle is confirmed to be T phase. T-phase particles, though corroded, do not significantly contribute to the dissolution of the surrounding matrix [30,31], so we will no longer pay too much attention to the T phase in subsequent discussions. Figure 10c is the pitting morphology of the 23-80-NA with a string of consecutive pits which are located in the elongated dislocation walls formed during rolling.…”

Section: Corrosion Behavior Measurementsmentioning

confidence: 99%

Effect of Precipitate Embryo Induced by Strain on Natural Aging and Corrosion Behavior of 2024 Al Alloy

Zhang

Luo

et al. 2018

Coatings

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Pre-aging precipitates in 2024 Al alloy re-dissolved during rolling, and Mg and Cu atoms were enriched in the dislocation structure to form "precipitate embryo", which is beneficial for the formation of second phase during the subsequent natural aging process. Due to the solubility of the large precipitate particles during deformation, the precipitates in the natural aging 2024 Al alloy were consist of two parts: The undissolved pre-precipitates and the natural aging precipitates derived from the embryos. The electrochemical corrosion behavior and passive film of the samples with different pre-aging time and strain were investigated by electrochemical tests and SEM. The results showed that the corrosion resistance and the passive film performance were deteriorated with the increase of pre-aging time due to the simultaneous increase of the quantity of the two-parts precipitates. The corrosion resistance can be improved by the increase of strain, because there will be smaller grain size and the existence of large undissolved precipitates in smaller strain samples.

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“…J Wanget, al. [14] investigated the corrosion pitting initiation for different sizes of S-phase in 2024Al alloy during the solid solution process, the results show that the S-phases triggers the local dissolution of the surrounding Al matrix with the increasement of the size. What's more, K.D.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Secondary Phase on the Corrosion of Al-Zn-Mg-Cu Alloy

Chen¹,

Zhang²,

Li³

2020

Int J Metall Met Phys

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A non-heat treatment way was applied to study the effect of the secondary phase on the corrosion of Al-Zn-Mg-Cu alloy in order to exclude the effect of variation of grain size. The area ration of corrosion pits and secondary phase (150 samples) was used to characterize the corrosion degree of secondary phase after Intergranular Corrosion test for a constant period. Then the effect of size and distribution of secondary phase was determined by using the SEM-EDS and EPMA equipment, the Electrochemical test and the Image-pro plus software after immersion test. The results show that the corrosion resistance of Al-Zn-Mg-Cu alloys is positive related to the size of secondary phase. The sparse or dense phase distribution on and within grain boundary retard the pit initiate and extend along the grain boundary, so it increases the corrosion resistance of Al-Zn-Mg-Cu alloy.

show abstract

Size-dependent role of S phase in pitting initiation of 2024Al alloy

Cited by 68 publications

References 24 publications

Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers

Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers

Effect of Precipitate Embryo Induced by Strain on Natural Aging and Corrosion Behavior of 2024 Al Alloy

Effect of the Secondary Phase on the Corrosion of Al-Zn-Mg-Cu Alloy

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