Corrosion behavior of friction stir welded lap joints of AA6061-T6 aluminum alloy

Gharavi, Farhad; Матори, Хамирул Амин; Yunus, Robiah; Othman, Norinsan Kamil

doi:10.1590/s1516-14392014005000053

Cited by 33 publications

(17 citation statements)

References 26 publications

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“…In some places of researched specimens, this pit dissolution was combined with inter-granular corrosion ( Figure 6). A similar attack was observed by Gharavi [34] in their work. The EDX analysis also showed that corrosion products identified by a higher concentration of oxygen are localized in around Si particles.…”

Section: Exposure Testsupporting

confidence: 86%

Role of Chemical Composition in Corrosion of Aluminum Alloys

Kuchariková

Liptáková

Tillová

et al. 2018

Metals

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Aluminum alloys are the most important part of all shaped castings manufactured, especially in the aerospace and automotive industries. This work focuses on the corrosion properties of the heat-hardening aluminum alloys commonly used for production of automotive castings AlSi7Mg0.3 and on self-hardening AlZn10Si8Mg. Iron is a common impurity in aluminum cast alloy and its content increases by using secondary aluminum alloys. Therefore, experimental materials were developed, with chemical composition according to standards (primary alloys) and in states with an increasing content of Fe. The experimental aluminum alloys are briefly discussed in terms of their chemical composition, microstructure, mechanical properties and corrosion behavior. Corrosion properties were examined using three types of corrosion tests: exposure test, potentiodynamic tests, and Audi tests. Corrosion characteristics of materials were evaluated using stereo, optical and scanning electron microscopy, energy dispersive X-ray analysis, too. Correlation of pit initiation sites with microstructural features revealed the critical role of iron-rich phases, silicon particles and corresponding alloy matrix.

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Section: Exposure Testsupporting

confidence: 86%

Role of Chemical Composition in Corrosion of Aluminum Alloys

Kuchariková

Liptáková

Tillová

et al. 2018

Metals

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“…The precise sequence of precipitation for Al‐Mg‐Si alloy during the process of ageing is well documented by several researchers . However, the precipitates, inclusions, solute depleted zones and surface defects that exist in the matrix of the alloy could also induce an unfavorable electrochemical heterogeneity diminishing its corrosion resistance . Thus, the microstructural state of an age‐hardenable alloy is also important in defining its corrosion characteristics.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of under‐, peak‐, and over‐aged 6063 alloy: A comparative study

Sekhar

Das

2019

Materials & Corrosion

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The mechanical property of age‐hardenable Al‐alloys is governed by the state of ageing, which determines the microstructure and consequently, their corrosion behavior which is a vital aspect for a number of applications. This article presents a comparative assessment of corrosion behavior of under‐, peak‐ and over‐aged Al‐Mg‐Si alloy. Corrosion characteristics have been determined via immersion tests in 0.1 M ortho‐phosphoric acid solution and intergranular corrosion (IGC) tests. Corroded surfaces are examined by field emission scanning electron micrographs‐energy dispersive spectroscopy and 3D optical profilometer. The obtained results reveal that the corrosion rate at a specific immersion time as well as the depth of IGC increases in the order for under‐, peak‐, and over‐aged states. Irrespective of the state of ageing, corrosion loss increases linearly but the rate of corrosion decreases rapidly with increasing immersion time. The dominant mode of corrosion in under‐aged alloy is identified as localized pitting, while peak‐aged is highly susceptible to IGC in contrast extensive pitting corrosion is observed for over‐aged alloy. The observed differences in corrosion behavior are explained considering characteristics of precipitates. Formation of β (Mg2Si) in case of over‐aged alloy and presence of inclusions like AlFeMnSi particles are found to accelerate pitting corrosion.

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“…Much research has focused on FSW lap joints of A5xxx and A6xxx alloys. Cantin et al [5], Kulekci et al [6], Yadava et al [7], Yazdanian et al [8], and Gharavi et al [9] have studied FSW lap joints of the A5083-O, A5754-T6, A6111-T4, A6060-T5, and A6061-T6 alloys, respectively. Several studies have been conducted on FSW lap joints of dissimilar A5xxx and A6xxx joints.…”

Section: Introductionmentioning

confidence: 99%