Corrosion pathways in aluminium alloys

Donatus, Uyime; Thompson, G.E.; Omotoyinbo, J.A.; Alaneme, Kenneth Kanayo; Aribo, Sunday; Agbabiaka, Okikiola Ganiu

doi:10.1016/s1003-6326(17)60006-2

Cited by 56 publications

(27 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…There is no T1‐depleted region as a result of selective dissolution. However, there are inherent T1‐rich bands which favour preferential severe localized corrosion initiation and propagation and defines the corrosion pathways along distinct layers . These bands are grain‐orientation dependent and are aligned parallel to the {111} Al.…”

Section: Resultsmentioning

confidence: 92%

The effect of surface pretreatment on the corrosion behaviour of silanated AA2198‐T851 Al‐Cu‐Li alloy

Donatus

Klumpp

Mogili

et al. 2018

Surface & Interface Analysis

View full text Add to dashboard Cite

The corrosion behaviour of silanated AA2198‐T851 alloy substrates with and with no manufacturing‐process induced near‐surface deformed layer (MPI‐NSDL) has been investigated. Two methods (alkaline etching + desmutting and mechanical polishing) were employed in removing the MPI‐NSDL. Silanization was performed using 2‐bis‐triethoxysilylethane. Electrochemical impedance spectroscopy (EIS), salt spray test, and microscopy techniques were employed in the investigation of the corrosion behaviours. The studies revealed that polishing appeared to be the best silanating pre‐treatment (compared with degreasing and etching + desmutting) for the new generation AA2198‐T851 Al‐Cu‐Li alloy, and this was reflected in the EIS spectra. The etched + desmutted and the degreased surface with MPI‐NSDL did not respond well to silanization and presented more pitting sites per square millimeter. However, the severity of corrosion per pit was more on the polished sample compared with the other two. Also, the corrosion mechanisms were different for the three cases.

show abstract

Section: Resultsmentioning

confidence: 92%

The effect of surface pretreatment on the corrosion behaviour of silanated AA2198‐T851 Al‐Cu‐Li alloy

Donatus

Klumpp

Mogili

et al. 2018

Surface & Interface Analysis

View full text Add to dashboard Cite

show abstract

“…From measurement in brackish water, it can be observed that there is no significant difference between the curves and values. Slightly different shape of the curve at 25°C and the lower value of E rev can be associated with inhomogeneity of the alloy surface . From stated it could be concluded that temperature elevation does not have a major influence on the pitting corrosion values in brackish water and that pitting is probably associated with precipitates distribution on the surface.…”

Section: Resultsmentioning

confidence: 93%

“…pits are created and immediately repassivated. Current density fluctuations are also related to inhomogeneity of alloy surface and presence of intermetallic particles . Above E p value, passivity breakdown occurs and stable pits are formed.…”

Section: Resultsmentioning

confidence: 99%

The effect of temperature on corrosion behavior of AA5083 in brackish water and seawater

Lokas

Alar

2019

Materials & Corrosion

View full text Add to dashboard Cite

show abstract

“…Moreover, evidence of corrosion in aluminium is confirmed [6]. Further scholarly articles Open circuit potential E oc À0.713 À0.723 À0.703 reported also indicate that aluminium and its alloys corrode, despite its formation of a natural oxide layer that is chemically inert [7][8][9][10][11][12][13][14][15][16]. However, corrosion study on aluminium 8-series family especially on aluminium 8015-alloy is yet to be reported.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behaviour of cold‐rolled aluminium AA8015‐alloy in natural seawater at 0.18 μm surface roughness

Olaogun

Akinlabi²,

Arotiba³

2019

Materialwissenschaft Werkst

View full text Add to dashboard Cite

Aluminium is one of the most produced and used metals globally, second to ferrous metals. Its good corrosion resistance is one of the reasons for its heavy usage in typical applications, such as in marine applications. Electrochemical corrosion study of cold‐rolled aluminium AA8015‐alloy at 0.18 μm surface roughness in natural seawater was explored. The aluminium AA8015‐alloy utilized in this study was cold rolled in a reversible Achenbach cold rolling mill in four pass schedules to a thickness gauge of 1.2 mm. A surface roughness of 0.18 μm with three cold mounted samples was achieved on an automated grinding/polishing machine using 320 grit, 800 grit, and 1200 grit SiC paper. Electrochemical corrosion experiments were conducted on the samples in natural seawater using a computer‐controlled potentiostat in an open polarization cell set‐up at room temperature. The corrosion behaviour on surface morphologies of the samples was observed by high mega pixel camera and scanning electron microscope. Findings reveal asymmetric polarization curves for all the samples and energy dispersive X‐ray spectrometry elemental analysis shows the existence of insoluble substrate complexes formed on the surfaces. Consequently, the scanning electron microscope analysis confirms localised corrosion in the mode of pitting.

show abstract

Corrosion pathways in aluminium alloys

Cited by 56 publications

References 33 publications

The effect of surface pretreatment on the corrosion behaviour of silanated AA2198‐T851 Al‐Cu‐Li alloy

The effect of surface pretreatment on the corrosion behaviour of silanated AA2198‐T851 Al‐Cu‐Li alloy

The effect of temperature on corrosion behavior of AA5083 in brackish water and seawater

Corrosion behaviour of cold‐rolled aluminium AA8015‐alloy in natural seawater at 0.18 μm surface roughness

Contact Info

Product

Resources

About