Study on corrosion behavior and mechanism of 5A06 aluminum alloy in N2O4 medium

Yao, Xiuquan; Li, Wen; Yu, Zhigang; Guo, Wei; Huang, Feifei; Qiang, Yujie; Jin, Ying

doi:10.1016/j.jallcom.2022.167544

Cited by 12 publications

(6 citation statements)

References 54 publications

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“…Basalt fiber is composed of 52.73 wt% SiO 2 , 15.15 wt% Al 2 O 3 , 5.93 wt% FeO, 4.17 wt% Fe 2 O 3 , 8.61 wt% CaO, 6.37 wt% MgO, and 7.04 wt% Other components [ 28 ]. Chemical composition of 5A06 Al are 0.032 wt% Cu, 0.258 wt% Fe, 6.42 wt% Mg, 0.555 wt% Mn, 0.422 wt% Si, 0.0495 wt% Ti, 0.0331 wt% V, 0.0216 wt% Zn, and residual components is Al [ 29 ].…”

Section: Materials and Hypervelocity Impact Experimentsmentioning

confidence: 99%

The Hypervelocity Impact Behavior and Energy Absorption Evaluation of Fabric

Cui

et al. 2023

Polymers

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In this work, the mechanical behavior and energy absorption characteristics of flexible fabric under hypervelocity impact (HVI) were investigated. Basalt fabric, ultra-high molecular weight polyethylene (UHMWPE) fabric, and aluminum alloy (Al) plate were chosen to be the sample materials for their excellent mechanical properties and applicative prospect in spacecraft shielding. HVI experiments had been conducted with the help of a two-stage light-gas gun facility, wherein Al projectile with 3.97 mm diameter was launched at velocities in the range 4.1~4.3 km/s. Impact conditions and areal density were kept constant for all targets. The microstructural damage morphology of fiber post-impact was characterized using a scanning electron microscope (SEM). Analysis results show that a brittle fracture occurred for Basalt fiber during HVI. On the contrary, the ductile fractures with large-scale plastic deformation and apparent thermal softening/melting of the material had happened on the UHMWPE fiber when subjected to a projectile impact. According to the HVI shielding performance and microstructural damage analysis results, it can be inferred that ductile fractures and thermal softening/melting of the material were the prevailing energy absorption behaviors of UHMWPE fabric, which leads to absorbing more impact energy than Basalt fabric and eventually, contributes the superior shielding performance.

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Section: Materials and Hypervelocity Impact Experimentsmentioning

confidence: 99%

The Hypervelocity Impact Behavior and Energy Absorption Evaluation of Fabric

Cui

et al. 2023

Polymers

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“…N 2 O 4 is often used as an oxidizer in two-component liquid propulsion systems in the first and second stages of launch vehicles, owing to its high density, high specific impulse, and strong oxidizing properties . In the case of long-term storage, N 2 O 4 absorbs H 2 O from the surrounding environment to form the N 2 O 4 (H 2 O) n system, which in turn generates HNO 3 , HNO 2 , and other substances, accelerating the corrosion of the storage tank and causing structural damages and propellant leakage, which are hazardous and threaten the safety of the equipment . Therefore, the study of the reaction mechanism of N 2 O 4 and H 2 O is of great significance for the structural design of weapons and equipment as well as for long-term storage safety.…”

Section: Introductionmentioning

confidence: 99%

ReaxFF-Based Molecular Dynamics Study of the Mechanism of the Reaction of N₂O₄ with H₂O

Guo,

Tian,

Chang

et al. 2024

ACS Omega

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During long-term storage of the liquid propellant N 2 O 4 , it absorbs H 2 O to form the N 2 O 4 (H 2 O) n system, and this in turn generates HNO 3 , HNO 2 , and other substances in the storage tank because of corrosion, which seriously affects the performance of weaponry. In this work, we carried out computational simulations of N 2 O 4 with different masses of water based on ReaxFF, analyzed the reaction intermediates and products, and investigated the mechanism of the reaction of N 2 O 4 with H 2 O and of N 2 O 4 (H 2 O) n . The results show that the reaction product ω(HNO 3 +HNO 2 ) undergoes a rapid growth in the early stage of the reaction and then tends toward dynamic equilibrium; the potential energy of the system decreases with the increase of ω(H 2 O), the reaction rate increases, and the rate of decomposition of HNO 2 to form HNO 3 increases. When ω(H 2 O) is 0.2 or 1.0%, the intermediate products are N 2 O 4 H 2 O or N 2 O 4 (H 2 O) 2 , respectively, and the reaction proceeds along two paths; when ω(H 2 O) ≥ 2.0%, N 2 O 4 (H 2 O) 3 appears as the intermediate product, HNO 3 and HNO 2 are directly produced in one step, and a stable current loop can be formed within the whole system.

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“…The protective Al 2 O 3 layer is extremely stable and results in good pitting resistance in near-neutral solutions (pH 4–8.5) of most non-halide salts [ 12 , 13 , 14 ]. However, media that contain aggressive ions such as acidic media, alkaline solutions, and aqueous halide salt solutions deteriorate the corrosion inhibition properties of Al alloys [ 15 , 16 , 17 , 18 , 19 , 20 ]. The consequent pitting and intergranular corrosion on the surface may initiate cracks and thus lead to catastrophic component failure.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Anticorrosion Resistance of Aluminum Alloys Using Femtosecond Laser-Based Surface Structuring and Coating

et al. 2023

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We report a robust two-step method for developing adherent and anticorrosive molybdenum (Mo)-based coatings over an aluminum (Al) 6061 alloy substrate using a femtosecond (fs) laser. The fs laser nanostructuring of Al 6061 alloy in air gives rise to regular arrays of microgrooves exhibiting superhydrophilic surface properties. The microstructured surface is further coated with an Mo layer using the fs-pulsed laser deposition (fs-PLD) technique. The combination of the two femtosecond laser surface treatments (microstructuring followed by coating) enabled the development of a highly corrosion-resistant surface, with a corrosion current of magnitude less than that of the pristine, the only structured, and the annealed alloy samples. The underlying mechanism is attributed to the laser-assisted formation of highly rough hierarchical oxide structures on the Al 6061 surface along with post heat treatment, which passivates the surface and provide the necessary platform for firm adhesion for Mo coating. Our results reveal that the corrosive nature of the Al-based alloys can be controlled and improved using a combined approach of femtosecond laser-based surface structuring and coating.

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Study on corrosion behavior and mechanism of 5A06 aluminum alloy in N2O4 medium

Cited by 12 publications

References 54 publications

The Hypervelocity Impact Behavior and Energy Absorption Evaluation of Fabric

The Hypervelocity Impact Behavior and Energy Absorption Evaluation of Fabric

ReaxFF-Based Molecular Dynamics Study of the Mechanism of the Reaction of N₂O₄ with H₂O

Enhancing Anticorrosion Resistance of Aluminum Alloys Using Femtosecond Laser-Based Surface Structuring and Coating

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Study on corrosion behavior and mechanism of 5A06 aluminum alloy in N2O4 medium

Cited by 12 publications

References 54 publications

The Hypervelocity Impact Behavior and Energy Absorption Evaluation of Fabric

The Hypervelocity Impact Behavior and Energy Absorption Evaluation of Fabric

ReaxFF-Based Molecular Dynamics Study of the Mechanism of the Reaction of N2O4 with H2O

Enhancing Anticorrosion Resistance of Aluminum Alloys Using Femtosecond Laser-Based Surface Structuring and Coating

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ReaxFF-Based Molecular Dynamics Study of the Mechanism of the Reaction of N₂O₄ with H₂O