Stress corrosion behavior of friction stir welding joint of 7N01 aluminum alloy

Pan, Yuzhe; Wang, Yu; Guo, Fuqiang; Zhang, Tiehao; Matsuda, Kenji; Wu, Dongting; Zhang, Yongang; Zou, Yong

doi:10.1016/j.jmrt.2021.08.112

Cited by 15 publications

(3 citation statements)

References 35 publications

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“…Thus, the corrosion resistance decreased [ 10 , 11 ]. Moreover, 7N01 aluminum alloy has corrosion sensitivity in humid and chlorine environments [ 12 , 13 , 14 ]. Long term exposure of the 7N01 aluminum alloy body of a high-speed train to atmospheric environment and polluted anions in urban and coastal areas will cause corrosion damage, leading to deterioration of the structure and performance.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Corrosion Behavior of MIG-Welded 7N01-T4 Aluminum Alloy by ER5356 and ER5087 Welding Wires

Wei

Liu

et al. 2022

Materials

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7N01-T4 aluminum alloy plates were welded by the metal inert gas (MIG) welding method, with ER5087 and ER5356 welding wires, respectively. The electrochemical corrosion behavior of the weld zones in the two kinds of welded joints using 3.5 wt.% and 5 wt.% NaCl solutions were investigated by polarization curve, electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM), and laser confocal scanning microscope (LCSM). The results indicated the better corrosion resistance of the weld zone in the ER5356 welded joint than that in the ER5087 welded joint, which was related to the different contents of Mn and Zn elements and the distribution of precipitates for the weld zones in the two kinds of welded joints. Based on the LSCM of the weld zones, the maximum depth (dmax) of corrosion pits for the weld zone in the ER5356 welded joint was lower than that in the ER5087 welded joint when immersed in the same NaCl concentrations. The dmax of the corrosion pit of the weld zone in the ER5356 welded joint using the 5 wt.% NaCl solution was 78.5 ± 0.96 μm, which was much bigger than that using the 3.5 wt.% NaCl solution. For the weld zone in the ER5087 welded joint with 5 wt.% NaCl solution, more Cl- was adsorbed onto the active surface of weld zones, which accelerated the corrosion, resulting in the corrosion mechanism from pitting to intergranular corrosion.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Corrosion Behavior of MIG-Welded 7N01-T4 Aluminum Alloy by ER5356 and ER5087 Welding Wires

Wei

Liu

et al. 2022

Materials

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“…Generally, the precipitation of intermetallic compounds on aluminum alloy, including Al-Si-Mg intermetallic particles, Mg 2 Si phase, Al-Cu-Mg phase and Al-Cu-Fe-Mn phase, should be the main reason for increased corrosion sensitivity [6][7][8][9][10][11][12]. It has been found that the pitting corrosion may occur on aluminum alloy due to the existence of the precipitated phases, besides the destruction from the corrosive ions like Cl − and SO 4 2− on the passive film (Al 2 O 3 ) [1,10,11,[13][14][15]. Meanwhile, the micro galvanic couple on aluminum alloy was directly related to the potential difference between precipitated phases and matrix, which was attributed to the uneven distributions of microstructure and composition caused by the precipitated phases [2,5,8,10,[14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…It has been found that the pitting corrosion may occur on aluminum alloy due to the existence of the precipitated phases, besides the destruction from the corrosive ions like Cl − and SO 4 2− on the passive film (Al 2 O 3 ) [1,10,11,[13][14][15]. Meanwhile, the micro galvanic couple on aluminum alloy was directly related to the potential difference between precipitated phases and matrix, which was attributed to the uneven distributions of microstructure and composition caused by the precipitated phases [2,5,8,10,[14][15][16]. Grilli et al believed that the initial corrosion positions correlated with the Al-Cu-Fe-Mn second phases on the 2219 aluminum alloy, and the phases were considered as cathodes during the corrosion process.…”

Section: Introductionmentioning

confidence: 99%

Focusing on the relationship between the precipitated phases and the pitting corrosion of ZL101A aluminum alloy

Liu¹,

Li²,

Zhang³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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The pitting corrosion behavior of ZL101A aluminum alloy in simulated marine environment was investigated for guiding the composition design. The Volta potential of the precipitated phases was mainly characterized via the in-situ SKPFM technique. The obtained results indicated that the precipitated phases of ZL101A were composed of Al-Si phase, Si-Mg-Fe phase and Si-rich/Al-poor phase, accelerating the formation of corrosion pits during immersion test. Both Al-Si phase and Si-Mg-Fe phase accelerated the corrosion process through the self-dissolution and the galvanic effect, respectively, which can be contributed to the high corrosion sensitivity of the two phases. Si-rich/Al-poor phase presented high corrosion resistance, which should be related to the deficiency of impure elements such as Mg and Fe.

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In-situ rolling friction stir welding of aluminum alloys towards corrosion resistance

Wang,

Meng,

Dong

et al. 2024

Corrosion Science

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Stress corrosion behavior of friction stir welding joint of 7N01 aluminum alloy

Cited by 15 publications

References 35 publications

Electrochemical Corrosion Behavior of MIG-Welded 7N01-T4 Aluminum Alloy by ER5356 and ER5087 Welding Wires

Electrochemical Corrosion Behavior of MIG-Welded 7N01-T4 Aluminum Alloy by ER5356 and ER5087 Welding Wires

Focusing on the relationship between the precipitated phases and the pitting corrosion of ZL101A aluminum alloy

In-situ rolling friction stir welding of aluminum alloys towards corrosion resistance

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