Microstructure and corrosion behaviour of A356 aluminium alloy modified with Nd

Semi-solid metal forming of aluminium alloys has demonstrated the capability to produce near net shaped high integrity components. Anodising of these components for aesthetic and/or improved corrosion resistance is specified by some designers or users of this technology. The corrosion behaviour of fully anodised and partially anodised A356 aluminium alloy plates produced using the CSIR Rheo-High Pressure Die Casting (CSIR-RHPDC) process was investigated using immersion testing in a 3.5% NaCl solution with pH = 7. Optical microscope equipped with image analysis software and scanning electron microscope (SEM) equipped with Energy Dispersive X-ray Spectroscopy (EDS) were used to evaluate the behaviour of the corroded samples. The fully anodised sample showed that the anodised surface displayed some surface degradation. This degradation was more severe on the anodised surface with surface liquid segregation (SLS), but provided sufficient protection to prevent corrosion of the base metal. The partially anodised sample showed severe corrosion of the based metal with the corrosion concentrated in the silicon rich eutectic and SLS regions.

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Influence of the microstructure and laser shock processing (LSP) on the corrosion behaviour of the AA2050-T8 aluminium alloy

Corrosion Science ◽

10.1016/j.corsci.2011.05.066 ◽

2011 ◽

Vol 53 (10) ◽

pp. 3215-3221 ◽

Cited By ~ 41

Author(s):

H. Amar ◽

V. Vignal ◽

H. Krawiec ◽

C. Josse ◽

P. Peyre ◽

...

Keyword(s):

Aluminium Alloy ◽

Corrosion Behaviour ◽

Laser Shock ◽

Laser Shock Processing ◽

Shock Processing

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Influence of Aging on Corrosion Behaviour of the 6061 Cast Aluminium Alloy

Materials ◽

10.3390/ma14081821 ◽

2021 ◽

Vol 14 (8) ◽

pp. 1821

Author(s):

Ting He ◽

Wei Shi ◽

Song Xiang ◽

Chaowen Huang ◽

Ronald G. Ballinger

Keyword(s):

Aluminium Alloy ◽

Laser Scanning ◽

Corrosion Behaviour ◽

Laser Scanning Microscopy ◽

Confocal Laser ◽

Kelvin Probe ◽

Force Microscopy ◽

The Matrix ◽

6061 Aluminium Alloy

The influence of AlFeSi and Mg2Si phases on corrosion behaviour of the cast 6061 aluminium alloy was investigated. Scanning Kelvin probe force microscopy (SKPFM), electron probe microanalysis (EPMA), and in situ observations by confocal laser scanning microscopy (CLSM) were used. It was found that Mg2Si phases were anodic relative to the matrix and dissolved preferentially without significantly affecting corrosion propagation. The AlFeSi phases’ influence on 6061 aluminium alloy local corrosion was greater than that of the Mg2Si phases. The corroded region width reached five times that of the AlFeSi phase, and the accelerating effect was terminated as the AlFeSi dissolved.

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MECHANICAL, TRIBOLOGICAL AND CORROSION BEHAVIOUR OF ALUMINIUM ALLOYS AND PARTICULATE REINFORCED ALUMINIUM OR ALUMINIUM ALLOY METAL MATRIX COMPOSITES - A REVIEW

i-manager s Journal on Material Science ◽

10.26634/jms.8.2.16759 ◽

2020 ◽

Vol 8 (2) ◽

pp. 40

Author(s):

PATEL MURLIDHAR ◽

KUMAR SAHU SUSHANTA ◽

KUMAR SINGH MUKESH ◽

◽

...

Keyword(s):

Aluminium Alloy ◽

Metal Matrix Composites ◽

Aluminium Alloys ◽

Metal Matrix ◽

Corrosion Behaviour ◽

Matrix Composites ◽

Particulate Reinforced ◽

Alloy Metal

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Development of air pressure tracking control system for cavity filling and its application to low pressure casting of the A356 aluminium alloy

International Journal of Cast Metals Research ◽

10.1080/13640461.2003.11819632 ◽

2003 ◽

Vol 16 (6) ◽

pp. 537-540 ◽

Cited By ~ 2

Author(s):

D.-Y. Lin ◽

M. C. Shih

Keyword(s):

Control System ◽

Aluminium Alloy ◽

Tracking Control ◽

Low Pressure ◽

Air Pressure ◽

Pressure Casting ◽

Cavity Filling ◽

Low Pressure Casting ◽

A356 Aluminium Alloy

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Corrosion behaviour of sintered 6061 aluminium alloy-graphite particle composites

Journal of Materials Science ◽

10.1007/bf00351231 ◽

1993 ◽

Vol 28 (15) ◽

pp. 4053-4058 ◽

Cited By ~ 1

Author(s):

M. Saxena ◽

A. K. Jha ◽

G. S. Upadhyaya

Keyword(s):

Aluminium Alloy ◽

Graphite Particle ◽

Corrosion Behaviour ◽

6061 Aluminium Alloy

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Corrosion of the Welded Aluminium Alloy in 0.5 M NaCl Solution. Part 2: Coating Protection

Materials ◽

10.3390/ma11112177 ◽

2018 ◽

Vol 11 (11) ◽

pp. 2177 ◽

Cited By ~ 8

Author(s):

Andrey Gnedenkov ◽

Sergey Sinebryukhov ◽

Dmitry Mashtalyar ◽

Igor Vyaliy ◽

Vladimir Egorkin ◽

...

Keyword(s):

Aluminium Alloy ◽

Welded Joint ◽

Electrochemical Impedance ◽

Corrosion Behaviour ◽

Weld Interface ◽

Open Circuit ◽

Al Alloy ◽

Protective Properties ◽

Coating Formation ◽

Electrode Technique

The high electrochemical activity of the aircraft 1579 aluminium alloy with a welded joint and the necessity of the coating formation to protect this material against corrosion as well as to increase the stability of the weld interface in the corrosive medium has been previously established. In this work, two suggested methods of protective coating formation based on plasma electrolytic oxidation (PEO) in tartrate-fluoride electrolyte significantly increased the protective properties of the welded joint area of the 1579 Al alloy. The electrochemical properties of the formed surface layers have been investigated using SVET (scanning vibrating electrode technique) and SIET (scanning ion-selective electrode technique), EIS (electrochemical impedance spectroscopy), OCP (open circuit potential), and PDP (potentiodynamic polarization) in 0.5 M NaCl. The less expressed character of the local electrochemical processes on the welded 1579 Al alloy with the composite coating in comparison with the base PEO-layer has been established. Polymer-containing coatings obtained using superdispersed polytetrafluoroethylene (SPTFE) treatment are characterized by the best possible protective properties and prevent the material from corrosion destruction. Single SPTFE treatment enables one to increase PEO-layer protection by 5.5 times. The results of this study indicate that SVET and SIET are promising to characterize and to compare corrosion behaviour of coated and uncoated samples with a welded joint in chloride-containing media.

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Wrought Aluminium Alloy Corrosion Propensity in Domestic Food Cooking Environment

ISRN Corrosion ◽

10.5402/2012/432342 ◽

2012 ◽

Vol 2012 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

S. O. Adeosun ◽

E. I. Akpan ◽

S. A. Balogun

Keyword(s):

Aluminium Alloy ◽

Capsicum Annuum ◽

Allium Cepa ◽

Corrosion Behaviour ◽

Microstructural Analysis ◽

Second Phase ◽

Capsicum Annuum L ◽

Heating And Cooling ◽

Corrosion Pits ◽

Domestic Food

The study on corrosion behaviour of wrought aluminium alloy in domestic food cooking conditions has been examined using the gravimetric approach. Flat cold rolled and annealed sheets were subjected to solutions of Capsicum annuum, L. esculentum, Allium cepa, and their blend under three conditions, namely, heating and cooling in still air, heating and cooling in refrigerator, and leaving some in open still atmosphere. Results show that corrosion occurred within the test period (288 hours) in the test environments. There was severe degradation within the first 70 hours of test when coupons were heated and cooled while unheated coupon showed low corrosion propensity. Microstructural analysis show the presence of corrosion pits on coupon surface with second phase particles sandwiched in α-aluminium matrix. Immersed coupon in the blend media show higher number of pits on the surface. Rapid corrosion of wrought aluminium alloy in Capsicum annuum, L. esculentum and Allium cepa media is attributed to the presence of corrosion aggressive elements such as allicin, diallyl-disulphide, and allyl-propyl disulphide present in the corrosion media.

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