Aluminum pitting in chloride solutions: morphology and pit growth kinetics

Baumgärtner, M.; Kaesche, Helmut

doi:10.1016/0010-938x(90)90112-i

Cited by 98 publications

(39 citation statements)

References 4 publications

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“…29 Others dealt with aluminum pitting, the critical chemistry requirement in that case, 30 and the distinction between pits and tunnels. 31 A persistent theme was the initiation of crevice corrosion, which according to most authors occurs by a slow process of passive dissolution, gradually building up the necessary chemistry, 32,33 but according to others, is due to pitting that would be metastable if it were to occur on a free surface, but is stabilized by the crevice (higher 'x' in Galvele's model). 34 .…”

Section: Related Advancesmentioning

confidence: 99%

Pitting Corrosion of Metals

Newman

2010

Electrochem. Soc. Interface

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Pitting corrosion of metals is one of the most important electrochemical corrosion phenomena. Corrosion of steel reinforcement in concrete is always in the news, and it starts off as pitting, caused by chloride ions-so it is feasible that pitting is the most costly form of corrosion. Such an assessment might not be the same in every decade, and it is hard to measure the cost of corrosion Synthetic Diamond: Emerging CVD Science and Technology Edited by K. E. Spear and J. P. Dismukes (1994) 688 pages. ISBN 978-0-471-53589-8 Electrochemical Oxygen Technology by K. Kinoshita (1992) 444 pages. ISBN 978-0-471-57043-1 ECS Members will receive a discount. All prices subject to change without notice.

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Section: Related Advancesmentioning

confidence: 99%

Pitting Corrosion of Metals

Newman

2010

Electrochem. Soc. Interface

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“…9a and b, in 2 M NaCl solution, pure Al and Al-Bi-Pb alloy undergo the crystallographic corrosion which is a typical corrosion behavior of aluminum alloys in chloride solutions. [42][43][44] The presence of some geometric facets can be explained by the fact that the corrosion occurs probably along the well-dened crystallographic directions of {100} facets. 45 Whereas, Al-Bi-Pb-Ga alloy exhibits a crack structure, which may be ascribed to the …”

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confidence: 99%

Performances of an Al–0.15 Bi–0.15 Pb–0.035 Ga alloy as an anode for Al–air batteries in neutral and alkaline electrolytes

et al. 2017

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Aluminum is a very good candidate anode for metal-air batteries due to its negative electrode potential, high theoretical electrochemical equivalent value, abundant reserves and environmental friendliness. The corrosion behavior and electrochemical properties of the Al-1.5Bi-1.5Pb-0.035Ga alloy were investigated by self-corrosion tests and electrochemical techniques, and compared with that of pure Al and Al-Bi-Pb alloys. The performances of Al-air batteries based on these alloy anodes were studied by constant current discharge and I-V discharge tests. The corrosion morphology and discharge surface were also investigated by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX)analysis. The results show that the Al-Bi-Pb-Ga alloy provides a more negative potential and exhibits an enhanced activity in NaCl solution compared with pure Al and Al-Bi-Pb alloys, and gives high power density (253.4 AE 2.5 mW cm À2) and desirable anode efficiency (85.4 AE 0.5%) when used as an anode for Al-air batteries in KOH solution. Moreover, the dissolution mechanism of the Al-Bi-Pb-Ga alloy is also characterized based on the electrochemical measurements and microstructure observations.

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“…This turning point did not emerge in several other solutions. According to the classical pitting corrosion mechanism, the small size of Cl À can penetrate the surface of magnesium alloy at some weak spots, such as casting defects, etc., then forming localized corrosion pits [19][20][21]. The polarization currents (i corr ) for AZ61 in urea solution and water were comparable, while corrosion potential (E corr ) in the urea solution was located at around À1.44 V, which was significantly more positive than that in pure water (Table 3).…”

Section: Potentiodynamic Polarization Measurementsmentioning

confidence: 99%

Corrosion behavior of 3C magnesium alloys in simulated sweat solution

Zhang

Tao

2011

Materials & Corrosion

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AZ series Mg alloys AZ31, AZ61, and AZ80 are widely applied in 3C (computer, communication, and consumer electronic) industry. Their corrosion characters in simulated sweat solution have been investigated by electrochemical technology, surface analysis, and pH measurements. Electrochemical test results showed that the three magnesium alloys revealed different corrosion resistance (R t ) in simulated sweat solution, R t(AZ31) < R t(AZ61) < R t(AZ80) . Three major components of simulated sweat solution played different roles during corrosion processes. Lactic acid was a kind of strong erosive medium for the magnesium alloys, and NaCl can induce pitting corrosion on alloys surface, while urea acted as a corrosion inhibitor. The corroded surface morphology of the three magnesium alloys was observed using scanning electron microscopy (SEM) and corrosion products were analyzed by X-ray diffraction (XRD). Result of pH measurement tests showed that there were differences in climbing speed and final values of pH for the three magnesium alloys in simulated sweat solution.

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Aluminum pitting in chloride solutions: morphology and pit growth kinetics

Cited by 98 publications

References 4 publications

Pitting Corrosion of Metals

Pitting Corrosion of Metals

Performances of an Al–0.15 Bi–0.15 Pb–0.035 Ga alloy as an anode for Al–air batteries in neutral and alkaline electrolytes

Corrosion behavior of 3C magnesium alloys in simulated sweat solution

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