Prediction model for atmospheric corrosion of 7005-T4 aluminum alloy in industrial and marine environments

Sun, Xiao‐Guang; Lin, Peng; Cheng, Ming; Cui, J.P.; Wang, Haibo; Dong, Chaofang; Li, Yong

doi:10.1007/s12613-018-1684-6

Cited by 15 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cl − in the solution is the main cause of pitting. Cl − is adsorbed at the defects of the passivation film to produce the soluble product AlCl 3 , and the AlCl 3 is generated as follows [31] :…”

Section: Corrosion Product Analysismentioning

confidence: 99%

Experimental study of corrosion behavior on 7005 aluminum alloy under acidic 3.5 wt% NaCl environment

Wang

Kou

et al. 2023

Materials & Corrosion

View full text Add to dashboard Cite

The corrosion failure behavior of 7005 aluminum alloy is a critical issue in the durability studies of vessels operating. In this study, the corrosion behavior of aluminum alloy 7005‐T4 in 3.5 wt% NaCl solution with pH 2, pH 4, and pH 6 was investigated by surface observation, electrochemical, and mechanical testing. The experiment results that the corrosion susceptibility is more at a solution of pH 2 compared with that at pH 4 and pH 6. The maximum depth and width of corrosion pits increase linearly with aggravation of corrosion. In addition, the probability distribution of the corrosion pit depth in each corrosion environment, which generally follows a Lognormal distribution, is statistically analyzed. The tendency of stress−strain curves at the elastic−plastic transition stage indicated that corrosion has an effect on mechanical performance, and revealed that corrosion promotes the advance of the plastic deformation stage. Fractography indicated the presence of a quasi‐cleavage zone beneath the corrosion layer. The results provide theoretical guidance for safe service and design guidelines for 7005 aluminum alloy.

show abstract

Section: Corrosion Product Analysismentioning

confidence: 99%

Experimental study of corrosion behavior on 7005 aluminum alloy under acidic 3.5 wt% NaCl environment

Wang

Kou

et al. 2023

Materials & Corrosion

View full text Add to dashboard Cite

show abstract

“…However, they have a strong tendency to suffer from local corrosion in an environment containing corrosive anions. [34][35][36] Seawater is a natural corrosive electrolyte, which contains high concentration of sodium chloride. [37] The abundance of chloride ions greatly promotes the corrosion of aluminum alloys resulting in the reduction of the service time of ships.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of a newly developed high strength aluminum alloy with high magnesium content under simulated seawater environment

Liu

Xie

et al. 2022

Materials & Corrosion

View full text Add to dashboard Cite

AMg61 (Al-6.2% Mg), a novel form of high-strength, high-magnesium-content aluminum alloy, has been developed for specific maritime engineering in recent years, while its corrosion behavior in seawater is still unknown. Therefore, the corrosion behavior of AMg61 in the simulated seawater was investigated herein, using a weight-loss test and different electrochemical measurements. In addition, corrosion morphology and chemical contents were characterized by metallography, scanning electron microscopy, and energydispersive spectroscopy. The results demonstrated that intergranular corrosion and microcracks developed first in the second phase of AMg61, followed by pitting corrosion. The matrix of AMg61, on the other hand, exhibited a uniform and exfoliation corrosion. The corrosion rate gradually decreased over time.

show abstract

“…Al 7005 alloy possesses intrinsic properties such as high strength, plasticity, weldability, with lightweight characteristics ensures widely applied in aircraft, marine ships, and rail transportation parts [ 58 ]. High-speed trains, aircraft and marine ships require load-bearing properties to minimize the incidence of parts failure against stress corrosion cracking and are subjected to a corrosive environment [ 59 , 60 , 61 ]. In general, S-containing species are generated viz.…”

Section: Introductionmentioning

confidence: 99%

“…In general, S-containing species are generated viz. chemical reactions take place between sulphur dioxide and water in marine atmosphere [ 59 , 62 ]. This could destroy the passive film of aluminium alloy and acidification of electrolyte film (if any) on the material surfaces [ 63 , 64 ].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behaviour of High-Strength Al 7005 Alloy and Its Composites Reinforced with Industrial Waste-Based Fly Ash and Glass Fibre: Comparison of Stir Cast and Extrusion Conditions

et al. 2021

View full text Add to dashboard Cite

The stringent demand to develop lightweight materials with enhanced properties suitable for various engineering applications is the focus of this research work. Industrial wastes such as fly ash (FA) and S-glass-fibres (GF) were used as reinforcement materials for high-strength alloy, i.e., Al 7005. Stir casting routes were employed for fabricating the four samples, Al 7005, Al 7005 + 5% GF, Al 7005 + 6% FA and Al 7005 + 5% GF + 6% FA. The extrusion process with different extrusion ratios (ER: 5.32:1, and 2.66:1) was used to examine the properties of all four samples. Extruded samples with ER: 5.32: 1 resulted in equiaxed grains with refined structure compared to stir casting parts. The effect of the extrusion process and the addition of reinforcements (GF and FA) on the gravimetric, electrochemical, and electrochemical impedance corrosion behaviour of Al 7005 composites in 1M HCl (Hydrochloric acid) solution were investigated. The results of all three corrosion methods showed that Al 7005 + 6% FA exhibited higher corrosion resistance. Corrosion rate of Al 7005, Al 7005 + 5% GF, Al 7005 + 6% FA and Al 7005 + 5% GF + 6% FA is found equal to 3.25, 2.41, 0.34, and 0.76 mpy, respectively. The FA particles remain inert and act as a physical barrier with corrosive media during the corrosion test. GF undergoes fibre degradation or disrupts the continuity of the glass network as a result of fibre leaching, which increases the corrosion rate in the sample. The gravimetric study showed that the corrosion rates decreased with an increase in extrusion ratio, which might be due to corrosion passivation increases and improved properties. The scanning electron microscopy reveals that corrosion fits, flakes and micro-cracks were observed more in the as-cast composites than that of extrusion composites, promoting the corrosion rate.

show abstract

Prediction model for atmospheric corrosion of 7005-T4 aluminum alloy in industrial and marine environments

Cited by 15 publications

References 18 publications

Experimental study of corrosion behavior on 7005 aluminum alloy under acidic 3.5 wt% NaCl environment

Experimental study of corrosion behavior on 7005 aluminum alloy under acidic 3.5 wt% NaCl environment

Corrosion behavior of a newly developed high strength aluminum alloy with high magnesium content under simulated seawater environment

Corrosion Behaviour of High-Strength Al 7005 Alloy and Its Composites Reinforced with Industrial Waste-Based Fly Ash and Glass Fibre: Comparison of Stir Cast and Extrusion Conditions

Contact Info

Product

Resources

About