Characterization and corrosion behavior of anodized Aluminum alloys for military industries applications in artificial seawater

Abdel‐Gawad, Soha A.; Osman, Walid M.; Fekry, Amany M.

doi:10.1016/j.surfin.2018.08.001

Cited by 71 publications

(30 citation statements)

References 23 publications

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“…However, there are few studies on the galvanic corrosion behavior of CFRP and metals, and the existing research mainly focuses on the existence of current density between CFRP/metal coupling double electrodes to illustrate that CFRP accelerates metal corrosion, but does not provide reasonable anticorrosion measures for metal materials. Corrosion resistance of metals is a consideration in CFRP/Al bolted joints engineering applications …”

Section: Introductionmentioning

confidence: 99%

“…Corrosion resistance of metals is a consideration in CFRP/Al bolted joints engineering applications. [20,21] In this paper, the surface of 5083P-O Al was anodized with three different contents of sulfuric acid solution. Combination with the electrochemical analysis, surface and cross-section corrosive morphologies analysis, the galvanic corrosion behavior between CFRP/5083P-O Al bolted joints with and without anodizing in 3.5 wt.% NaCl spray was investigated.…”

Section: Introductionmentioning

confidence: 99%

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Effect of anodizing on galvanic corrosion behavior of T300 CFRP/5083P‐O Al bolted joints

Shan

Guo

Gou

et al. 2019

Materials & Corrosion

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T300 carbon fiber reinforced polymer (CFRP) and 5083P‐O aluminum (5083P‐O Al) alloy bolted joints have been used in high‐speed trains due to the advantages of light weight and high strength. However, high potential difference between the CFRP and 5083P‐O Al will induce galvanic corrosion and result in accelerating corrosion rate of 5083P‐O Al, which is a potential risk for its engineering applications. In this work, combination with the electrochemical analysis, surface and cross‐section corrosive morphologies analysis, the galvanic corrosion behavior between CFRP/5083P‐O Al bolted joints with and without anodizing in 3.5 wt.% NaCl spray was investigated. Results indicated that severe corrosion occurred on unanodized 5083P‐O Al in the coupled regions of the CFRP/5083P‐O Al bolted joint due to galvanic corrosion. With the content of sulfuric acid increasing, the thickness of each Al2O3 layer and atomic oxygen content increases significantly. 5083P‐O Al anodized by the 135 g/L H2SO4 + 8 g/L H3BO3 mixed solution had the favorable Al2O3 film, which increased the resistance of 5083P‐O Al by roughly three orders of magnitude, effectively improving the corrosion resistance of 5083P‐O Al.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of anodizing on galvanic corrosion behavior of T300 CFRP/5083P‐O Al bolted joints

Shan

Guo

Gou

et al. 2019

Materials & Corrosion

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“…Cerchier et al [39] used the Plasma Electrolytic Oxidation coating technique on samples of 7075 aluminum alloy and they obtained thick and adherent coatings [39]. Abdel-Gawad et al [40] studied the corrosion behavior of the hard-anodizing coating formed on different groups of aluminum alloys in the sulphuric acid electrolyte. The corrosion resistance and the anodized coating layer are influenced by the type of the alloy and the anodizing conditions such as current density, acid concentration and time of duration [40].…”

Section: Introductionmentioning

confidence: 99%

“…Abdel-Gawad et al [40] studied the corrosion behavior of the hard-anodizing coating formed on different groups of aluminum alloys in the sulphuric acid electrolyte. The corrosion resistance and the anodized coating layer are influenced by the type of the alloy and the anodizing conditions such as current density, acid concentration and time of duration [40]. The influence of the hard-anodizing process parameters such as H 2 SO 4 concentration, electrolyte temperature, Al 3+ concentration and current density for the AA2011-T3 was evaluated.…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies on Corrosion Behavior of Ceramic Surface Coating using Different Deposition Techniques on 6082-T6 Aluminum Alloy

et al. 2018

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Aluminum alloys cannot be used in aggressive corrosion environments application. In this paper, three different surface coating technologies were used to coat the 6082-T6 aluminum alloy to increase the corrosion resistance, namely Plasma Electrolytic Oxidation (PEO), Plasma Spray Ceramic (PSC) and Hard Anodizing (HA). The cross-sectional microstructure analysis revealed that HA coating was less uniform compared to other coatings. PEO coating was well adhered to the substrate despite the thinnest layer among all three coatings, while the PSC coating has an additional loose layer between the coat and the substrate. X-ray diffraction (XRD) analysis revealed crystalline alumina phases in PEO and PSC coatings while no phase was detected in HA other than an aluminum element. A series of electrochemistry experiments were used to evaluate the corrosion performances of these three types of coatings. Generally, all three-coated aluminum showed better corrosion performances. PEO coating has no charge transfer under all Inductive Coupled Plasma (ICP) tests, while small amounts of Al3+ were released for both HA and PSC coatings at 80 °C. The PEO coating showed the lowest corrosion current density followed by HA and then PSC coatings. The impedance resistance decreased as the immersion time increased, which indicated that this is due to the degradation and deterioration of the protective coatings. The results indicate that the PEO coating can offer the most effective protection to the aluminum substrate as it has the highest enhancement factor under electrochemistry tests compared to the other two coatings.

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“…Although, synthesizing the Aluminum Oxide nanostructures in large volume for industrial applications, due to their expensive and time consuming production methods such as: chemical vapor deposition (CVD) techniques or electrophoretic based methods [22][23][24][25][26][27][28][29][30][31][32], limited their application for opteoelectronic devices or water purification technologies. On the other hand, novel fabrication techniques such as electrochemical anodization methods have shown more accurate controllability over materials morphology and chemical composition of nanostructures in comparison to conventional production techniques as well as their easier scalability for industrial applications [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52]. As a result, the electrochemical anodization techniques have a potential to pave the way for the industrial scale production of nanostructures with a highly controlled morphology as well as their chemical composition and crystalline structure [53].…”

Section: Introductionmentioning

confidence: 99%

Synthesizing high aspect ratio Aluminum Oxide nanowires from highly-ordered anodic self-assembled templates

Ghezghapan¹,

Saba²

2018

Preprint

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Aluminum Oxide and its nanostructures are attracted the attention of researchers due to their special materials properties such as: high electrical insulation, high mechanical strength, corrosion resistance, chemical stability, and low thermal conductivity. Furthermore, Aluminum Oxide nanowires shows large surface area as well as highly electropositive surface, which makes them suitable candidates for water purification technology applications. One of the main challenges, which limited the usage of Aluminum Oxide nanowires, is high cost and complex fabrication methods for Aluminum Oxide synthesizing such as chemical vapor deposition (CVD) techniques. On the other hand, electrochemical methods such as anodizing/etching techniques show high controllability over chemical composition, morphology,and crystalline structure of nanowires. In this research, a room temperature two-steps anodization procedure is developed to fabricate a highly-ordered self-assembled templates. Furthermore, the etching method is used to convert this synthesized self-assembled template into Aluminum Oxide nanowires. The results show that the proposed electrochemical method maintains a highly-ordered morphology as well as industrially acceptable controllability over crystalline structure of nanowires, which could be used to optimize the procedure for industrial applications due to low cost and simple experimental setup.

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Characterization and corrosion behavior of anodized Aluminum alloys for military industries applications in artificial seawater

Cited by 71 publications

References 23 publications

Effect of anodizing on galvanic corrosion behavior of T300 CFRP/5083P‐O Al bolted joints

Effect of anodizing on galvanic corrosion behavior of T300 CFRP/5083P‐O Al bolted joints

Experimental Studies on Corrosion Behavior of Ceramic Surface Coating using Different Deposition Techniques on 6082-T6 Aluminum Alloy

Synthesizing high aspect ratio Aluminum Oxide nanowires from highly-ordered anodic self-assembled templates

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