Investigation of corrosion behaviour of hydrogenated 7075-T6 aluminum alloy

El-Amoush, Amjad Saleh

doi:10.1016/j.jallcom.2006.12.045

Cited by 18 publications

(6 citation statements)

References 17 publications

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“…El-Amoush [154] investigated the corrosion behavior of hydrogenated Al 7075 T6 alloy in a 0.5 M NaCl solution with a pH of 3.56. Increasing the precharged hydrogen time increases the pitting and severity of the attack.…”

Section: Corrosion Propertiesmentioning

confidence: 99%

A Systematic Review on the Mechanical, Tribological, and Corrosion Properties of Al 7075 Metal Matrix Composites Fabricated through Stir Casting Process

Sambathkumar¹,

Gukendran²,

Mohanraj

et al. 2023

Advances in Materials Science and Engineering

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Aluminium alloy components are used in lightweight engineering applications and lack mechanical properties, wear resistance, and corrosion resistance. When hard reinforcement particulates are dispersed in the aluminium matrix alloy, aluminium matrix composites (AMCs) are formed. This new material exhibits enhanced properties such as better specific stiffness, specific strength, corrosion resistance, elastic modulus, wear resistance, and lightweight. AMCs have many favorable properties compared to their alloy and extensive applications. Especially, in the space industry, where weight reduction and an increase in modulus are prevalent, the strength-to-weight ratio is more important. This study focuses on the tribological, mechanical, and corrosion properties of Al 7075 metal matrix composites (MMCs) reinforced with one or more particulates such as aluminium oxide (Al2O3), boron carbide (B4C), titanium carbide (TiC), silicon carbide (SiC), titanium dioxide (TiO2), and titanium diboride (TiB2). In AMCs, the reinforcements are incorporated by either the solid or liquid metallurgy route. The study addresses the findings and shortcomings in the preparation of MMCs with reinforcements and their improvement in corrosion resistance, wear resistance, mechanical properties, and lower coefficient of thermal expansion than the Al 7075 base alloy. A comprehensive survey of reinforcement particulates in MMCs and their influences are outlined from the literature, encompassing recent research trends to enhance the structural properties.

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Section: Corrosion Propertiesmentioning

confidence: 99%

A Systematic Review on the Mechanical, Tribological, and Corrosion Properties of Al 7075 Metal Matrix Composites Fabricated through Stir Casting Process

Sambathkumar¹,

Gukendran²,

Mohanraj

et al. 2023

Advances in Materials Science and Engineering

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“…Regarding these failures of 7075 aluminum alloy during service, researchers have mostly tried to improve the corrosion resistance of alloys by adding trace elements, changing the mixing ratio of alloy elements, or modifying the heat treatment process. Amoush et al [ 7 ] studied the effect of trace element Sr on the corrosion resistance of AlMgSiCu alloy through a full immersion corrosion test, salt spray corrosion test, and electrochemical corrosion test. A full immersion corrosion test revealed that adding Sr reduced the mass loss rate of AlMgSiCu alloy from 2.76 mg/(h·cm 2 ) to 1.39 mg/(h·cm 2 ).…”

Section: Introductionmentioning

confidence: 99%

Corrosion mechanism and machinability of 7075‐T6 aluminum alloy in high‐speed cutting: With and without cryogenic treatment

Ping

Wang

Lin

et al. 2023

Materials & Corrosion

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This work aims to explore the effect of cutting parameters on the cutting force, surface quality, and corrosion resistance of 7075-T6 aluminum alloy after and without cryogenic treatment. Cryogenically treated (T6-C) and noncryogenically treated (T6) 7075-T6 aluminum alloy samples are experimentally cut and electrochemically corroded in a 3.5% NaCl solution. SEM, EDS, and electrochemical analysis are carried out to examine how cutting parameters affect the cutting force, surface quality, and corrosion resistance of cryogenically treated 7075-T6 aluminum alloy. The results show that after cryogenic treatment, under different cutting speeds, the cutting force is up to 39.8% smaller than without cryogenic treatment; under different cutting depths and feed rates, the cutting force is up to 136% and 21.54% smaller, respectively. Cryogenic treatment dramatically reduces the cutting force in the cutting process. As cutting speed increases, machined surface quality becomes better; fewer corrosion products and cracks are induced. When the cutting depth is 1.5 mm, there are fewer plows and micro-cracks on the machined surface than under other parameters, but cutting depth does not affect corrosion morphology significantly. The size of corrosion products is up to 55 μm smaller.The electrochemical analysis finds that at the cutting speed of 1500 m/min, after cryogenic treatment, the current density is 59.4% smaller than without cryogenic treatment; polarization resistance is 1.68 × 10 5 Ω•cm 2 larger. At the cutting depth of 1.5 mm, after cryogenic treatment, the current density is 66.16% smaller; self-corrosion potential shifts 0.19 V toward the positive pole. At the feed rate of 0.06 mm/z, after cryogenic treatment, self-corrosion potential shifts 0.18 V toward the positive pole; polarization resistance is 10.7% larger.

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“…Based on the tempering of the material, there are different types like Al 7075-0, 7075-T6, 7075-T651, and 7075-T7, where '0' denotes it is annealed, 'T6' denotes it is solution heat treated and artificially aged, 'T651' denotes it is solution heat treated, stress relieved by stretching and artificially aged, 'T7' denotes it is solution heat treated and stabilized. In our study, we have chosen Al 7075-T651 because of its ultimate tensile strength and yield strength when compared to other tempered alloys [8,9]. Its high machinability property gives the components a very high surface finish.…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide—Polymethyl methacrylate coatings for Corrosion protection of aerospace aluminium alloy 7075—T651 surfaces

Aravindh

Karthikeyan

2020

Eng. Res. Express

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We report a corrosion study on Al 7075—T651 surface. The purpose of the study is to use Graphene oxide—Polymethyl methacrylate (GO—PMMA) coating as corrosion resistant layer on Al 7075—T651, an alloy of aluminium mainly used in aerospace industries. The study is done with and without GO—PMMA coating on Al 7075—T651 respectively, by varying the exposure time of material (24, 48 and 72 h) with HCl in atmospheric condition. The formation of corrosion is resisted by the GO—PMMA coated samples. The effect is studied by material characterization and non-destructive evaluation (NDE) techniques. The formation of aluminium hydroxide in uncoated samples is confirmed by Raman spectroscopy and x-ray diffraction (XRD). Corrosion formation, GO—PMMA coating on plain and coated samples are clearly visible in Scanning Electron Microscope (SEM) study. Shift in current is observed in I–V Characteristics study, due to pitting in plain samples. Material loss is observed, to be low in GO—PMMA coated samples, using pulsed thermography. The work proves that the GO—PMMA coating is very effective in corrosion resistance.

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Investigation of corrosion behaviour of hydrogenated 7075-T6 aluminum alloy

Cited by 18 publications

References 17 publications

A Systematic Review on the Mechanical, Tribological, and Corrosion Properties of Al 7075 Metal Matrix Composites Fabricated through Stir Casting Process

A Systematic Review on the Mechanical, Tribological, and Corrosion Properties of Al 7075 Metal Matrix Composites Fabricated through Stir Casting Process

Corrosion mechanism and machinability of 7075‐T6 aluminum alloy in high‐speed cutting: With and without cryogenic treatment

Graphene oxide—Polymethyl methacrylate coatings for Corrosion protection of aerospace aluminium alloy 7075—T651 surfaces

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