The influence of Ti and Zr on electrochemical properties of aluminum sacrificial anodes

Sina, Hossein; Emamy, M.; Saremi, M.; Keyvani, A.; Mahta, M.; Campbell, John B.

doi:10.1016/j.msea.2006.06.011

Cited by 53 publications

(32 citation statements)

References 13 publications

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“…Due to the zinc and magnesium are smaller and larger, respectively than aluminum [4]. In addition, the presence of (MgZn) 49 Al 32 -precipitates is also associated with the galvanic efficiency.…”

Section: Microstructure Characterizationmentioning

confidence: 99%

“…In name only, anode could be applied to any metallic structure in contact with a bulk electrolyte. The selection is based on evidence that aluminum alloys exhibit an anodic dissolution process, low active electrode potential (-950 to -1200 mV) and high theoretical current capacity [4]. In fact, magnesium is the most important alloying element for good performance as sacrificial anode.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Correlation between Hardness, Structure and Electrochemical Performance of an AlZnMnMg Alloy

Valdez¹,

Campillo²,

Islas³

2012

ENG

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In this work the structural changes induced by aged treatment have shown a connection with differences of hardness and electrochemical performance. Al-base alloys have been investigated by means of Vickers hardness, X-ray diffraction, scanning electron and short-term electrochemical test. X-ray diffraction result reveals the formation of (MgZn) 49 Al 32 phase for two conditions, the first one is when the magnesium content is upper to 5.49% in as-cast condition and the second one after the thermal treatment carried out at 450˚C for 5 h. In addition, the hardness and electrochemical performance has been influenced by the presence and quantity of the (MgZn) 49 Al 32 phase. The addition of magnesium alloying modifies the microstructure, increases the content of (MgZn) 49 Al 32 phase and provides a localized corrosion which conduced to the breakdown of the oxide film (-Al 2 O 3 ) formed on the Al alloy surface.

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Section: Microstructure Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Correlation between Hardness, Structure and Electrochemical Performance of an AlZnMnMg Alloy

Valdez¹,

Campillo²,

Islas³

2012

ENG

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“…There were fluctuations of potential only at the beginning of the test period and then they became almost stable with a very slight gradual increase in the potential values. This fluctuation in the potential variation versus time is attributable to the non-uniform corrosion of the anode, especially pitting in the case of sacrificial anodes [11].…”

Section: Bio-growthmentioning

confidence: 99%

“…This film is relatively stable in aqueous solutions over a wide pH range of 4.0-8.5 [5]. The passivity of aluminum can be overcome by adding suitable alloying elements such as In, Hg, Ga, Sn, Bi [6][7][8][9][10][11]. However, most of these metal activated sacrificial anodes undergo pitting corrosion in chloride environments.…”

Section: Introductionmentioning

confidence: 99%

Development of MnO2-incorporated high performance aluminum alloy matrix sacrificial anodes

Shibli

Binoj

2008

J Appl Electrochem

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Manganese dioxide, a potential catalyst in many electrochemical reactions, was explored as an effective activator in Al ? 5% Zn alloy sacrificial anodes. The catalytic influence of MnO 2 on the anodes was microstructurally and electrochemically characterized using different electrochemical techniques. The process of incorporation of MnO 2 not only improved the grain size but also the galvanic performance of the anodes significantly. A galvanic performance as high as 80% was achieved by incorporating an optimum quantity (0.5%) of MnO 2 in the anode matrix. High and steady active open circuit potential, very low polarization and substantial reduction in self corrosion were achieved during galvanic exposure tests. Effective activation of the anodes by MnO 2 was also revealed by the results of electrochemical impedance analysis. The tolerance to biofouling on the anode surface was studied by quantifying the number of micro-organisms on the anode surface after immersing in natural sea water containing the micro-organisms.

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“…Extensive studies on the surface modification of Al alloys by binary or ternary have been reported [12][13][14][15][16][17]. Hence, the uniform and homogeneous distribution of other metal on aluminium alloy effectively suppresses the formation of passive Al 2 O 3 on the Al alloy anode systems, which in turn activates the anode i.e., alloying of third metal on aluminium-zinc alloy.…”

Section: Introductionmentioning

confidence: 99%

Galvanic Corrosion Characteristics of Aluminium Alloy with Group II Metal

Vijayarani¹,

Vishnudevan²,

Natarajan³

2017

IOSR JAP

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The influence of Ti and Zr on electrochemical properties of aluminum sacrificial anodes

Cited by 53 publications

References 13 publications

Correlation between Hardness, Structure and Electrochemical Performance of an AlZnMnMg Alloy

Correlation between Hardness, Structure and Electrochemical Performance of an AlZnMnMg Alloy

Development of MnO2-incorporated high performance aluminum alloy matrix sacrificial anodes

Galvanic Corrosion Characteristics of Aluminium Alloy with Group II Metal

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