Impact of Corrosion on the Degradation of the Mechanical Properties of 2195 and 2297 Al Alloys in the Marine Environment

Wu, Hulin; Wu, Guang; Xiang, Lin; Tao, Jianquan; Zheng, Zhongyan; Sun, Jipeng; Li, Wei; Huang, Chunyang; Lan, Xuke

doi:10.3390/met12081371

Cited by 7 publications

(6 citation statements)

References 31 publications

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“…Materials 2023, 16, x FOR PEER REVIEW 7 of 14 The open-circuit potential of sample 3 after laser shock peening at a power density of 4.77 GW/cm 2 was −0.72 V vs. SCE; 4% higher than the open-circuit potential of sample 2. At 7.96 GW/cm 2 , the open-circuit potential of sample 4 was −0.64 V vs. SCE; 11% higher than the open-circuit potential of sample 3 and slightly higher than the open-circuit potential of sample 1. At 11.15 GW/cm 2 , the open-circuit potential of sample 5 was −0.56 V vs. SCE; a substantial increase of 12.5% compared with sample 4.…”

Section: Electrochemical Corrosion Performancementioning

confidence: 81%

“…The amount of energy required for corrosion to propagate along the grain boundaries increased, and corrosion crack propagation was suppressed. 2 , the open-circuit potential of sample 5 was −0.56 V vs. SCE; a substantial increase of 12.5% compared with sample 4. In summary, the open-circuit potential vs. time curve gradually flattened after laser shock peening, and the anodic behavior became more stable.…”

Section: Cross-section Microstructurementioning

confidence: 90%

“…At 7.96 GW/cm 2 , the open-circuit potential of sample 4 was −0.64 V vs. SCE; 11% higher than the open-circuit potential of sample 3 and slightly higher than the open-circuit potential of sample 1. At 11.15 GW/cm2 , the open-circuit potential of sample 5 was −0.56 V vs. SCE; a substantial increase of 12.5% compared with sample 4. In summary, the open-circuit potential vs. time curve gradually flattened after laser shock peening, and the anodic behavior became more stable.…”

mentioning

confidence: 94%

“…E690 high-strength steel [ 1 ] is commonly used in pile leg materials and gears of marine platforms. The complex marine environment can lead to various failure forms of equipment [ 2 , 3 ], among which corrosion [ 4 , 5 ] is the most consequential. Laser shock peening [ 6 , 7 ] is a surface-strengthening process developed in the 1960s, which uses high-power laser irradiation to induce plasma shock waves to act on the target surface.…”

Section: Introductionmentioning

confidence: 99%

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Laser Shock Peening Improves the Corrosion Resistance of an E690 High-Strength Steel Cladding Layer

et al. 2023

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To investigate the effect of laser shock peening parameters on the corrosion resistance of an E690 high-strength steel cladding layer, NVE690 high-strength steel powder was selected for testing at various power densities of pulse lasers. The surface roughness and residual stress of the treated samples were measured, and the microstructure morphology of the sample surface was observed. The electrochemical corrosion tests were conducted with an electrochemical workstation to measure the electrometer polarization, obtain the impedance curve, and observe the electrochemical corrosion. As the laser power density increased, the surface grains of the E690 high-strength steel cladding layer continued to refine until nanocrystals formed, and the residual compressive stress on the surface increased. The residual compressive stress on the surface rendered the passivation film stable and dense; furthermore, the refinement of surface grains inhibited the initiation and propagation of microcracks. The positive shift of the corrosion potential increased from −1.004 to −0.771 V, the corrosion current density decreased from 114.5 to 5.41 μA/cm2, the radius of the impedance spectrum curve increased, and the peeling pits, as well as corrosion micropores on the surface, gradually became no longer evident after electrochemical corrosion. After laser shock treatment, the corrosion resistance of the cladding layer sample was substantially improved.

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Section: Electrochemical Corrosion Performancementioning

confidence: 81%

Section: Cross-section Microstructurementioning

confidence: 90%

mentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Laser Shock Peening Improves the Corrosion Resistance of an E690 High-Strength Steel Cladding Layer

et al. 2023

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“…This pattern differed from that of the 7085 alloy fatigue strength, which decreased more than 90% after 3 months of outdoor exposure in a marine environment [ 26 ]. Additionally, the ultimate strength variation of the present alloy was slower than that of 2xxx aluminum alloys, which decreased by more than 10% after outdoor exposure in a marine environment [ 27 ]. Combined with the analysis of the corrosion features, the main corrosion mechanism of the 7085 alloy was IGC, which formed a large number of intergranular cracks inside the microstructure.…”

Section: Resultsmentioning

confidence: 99%

Corrosion Behavior and Mechanical Performance of 7085 Aluminum Alloy in a Humid and Hot Marine Atmosphere

Tao¹,

Xiang²,

Zhang³

et al. 2022

Materials

Self Cite

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This work analyzed changes in the corrosion morphology and mechanical performance of 7085 aluminum alloy after outdoor exposures for different times in a humid and hot marine atmospheric environment. After one month of exposure, a pronounced corrosion of the alloy was observed. The corrosion product was mainly Al(OH)3, and the corrosion features were mainly pitting corrosion and intergranular corrosion (IGC). With the exposure time extended from 6 months to 12 months, the IGC depth increased from 114 μm to 190 μm. After a 1-year outdoor exposure in a humid and hot marine environment, the alloy’s ultimate strength and yield stress remained nearly unchanged, while its elongation and area reduction decreased from the original 6% and 9%, respectively, to 3% and 5%. Moreover, the reasons for IGC and its effect on the mechanical performance was analyzed.

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Parametric investigation of ultrashort pulsed laser surface texturing on aluminium alloy 7075 for hydrophobicity enhancement

Cholkar,

Chatterjee,

Jose

et al. 2024

Int J Adv Manuf Technol

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Hydrophobicity plays a pivotal role in mitigating surface fouling, corrosion, and icing in critical marine and aerospace environments. By employing ultrafast laser texturing, the characteristic properties of a material’s surface can be modified. This work investigates the potential of an advanced ultrafast laser texturing manufacturing process to enhance the hydrophobicity of aluminium alloy 7075. The surface properties were characterized using goniometry, 3D profilometry, SEM, and XPS analysis. The findings from this study show that the laser process parameters play a crucial role in the manufacturing of the required surface structures. Numerical optimization with response surface optimization was conducted to maximize the contact angle on these surfaces. The maximum water contact angle achieved was 142º, with an average height roughness (Sa) of 0.87 ± 0.075 µm, maximum height roughness (Sz) of 19.4 ± 2.12 µm, and texture aspect ratio of 0.042. This sample was manufactured with the process parameters of 3W laser power, 0.08 mm hatch distance, and a 3 mm/s scan speed. This study highlights the importance of laser process parameters in the manufacturing of the required surface structures and presents a parametric modeling approach that can be used to optimize the laser process parameters to obtain a specific surface morphology and hydrophobicity.

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Impact of Corrosion on the Degradation of the Mechanical Properties of 2195 and 2297 Al Alloys in the Marine Environment

Cited by 7 publications

References 31 publications

Laser Shock Peening Improves the Corrosion Resistance of an E690 High-Strength Steel Cladding Layer

Laser Shock Peening Improves the Corrosion Resistance of an E690 High-Strength Steel Cladding Layer

Corrosion Behavior and Mechanical Performance of 7085 Aluminum Alloy in a Humid and Hot Marine Atmosphere

Parametric investigation of ultrashort pulsed laser surface texturing on aluminium alloy 7075 for hydrophobicity enhancement

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