Determination of hydrogen absorption in Pd coated Al thin films

Azofeifa, D. E.; Clark, N.J.; Amador, A.; Sáenz, Alejandro

doi:10.1016/s0040-6090(96)09493-x

Cited by 15 publications

(7 citation statements)

References 9 publications

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“…Hydrogen in solution induces a significant change in the resistivity in aluminum. This property was utilized by Azofeifa et al 26 to measure the in-situ hydrogen-uptake kinetics of aluminum thin foils. The palladiumcoated aluminum foils were exposed to hydrogen gas at a pressure of 4.0 kPa at a temperature of 22°C.…”

Section: Hydrogen Uptake During Corrosion and Stress Corrosionmentioning

confidence: 99%

The influence of hydrogen on the stress-corrosion cracking of low-strength Al-Mg alloys

Jones

2003

JOM

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There is growing evidence for hydrogen uptake in aluminum alloys and its contribution to the crack growth of high-strength aluminum alloys, but less evidence for low-strength alloys. This paper summarizes the evidence for hydrogen uptake in a low-strength alloy, AA5083, and its contribution to the stress-corrosion cracking of this alloy.A key factor is the anodic dissolution of grain boundary β phase (Al 3 Mg 2 ) and the associated hydrogen reduction that accompanies this dissolution.

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Section: Hydrogen Uptake During Corrosion and Stress Corrosionmentioning

confidence: 99%

The influence of hydrogen on the stress-corrosion cracking of low-strength Al-Mg alloys

Jones

2003

JOM

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“…al., 2006). It was proposed that atomic hydrogen is introduced to the alloy during the atmospheric corrosion process through the reduction of water according to Equation [1], followed by adsorption of the hydrogen atoms on the surface (Azofeifa et. al., 1997).…”

Section: Introductionmentioning

confidence: 99%

The crack growth resistance behaviour of aluminium alloy 2024-T3 at slow strain rates after exposure to standard corrosive environments

Pretorius

Mostert

2021

J. S. Afr. Inst. Min. Metall.

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SYNOPSIS The study investigates the effect of prior corrosive exposure on crack growth resistance behaviour of thin sheet (3 mm thick) aluminium alloy 2024-T3 at slow strain rates. Compact tension specimens were exposed to standard corrosive environments that simulate accelerated atmospheric corrosion attack. TWo corrosive environments were considered - an exfoliation corrosion (EXCO) solution and a 3.5 wt% sodium chloride solution. The unloading compliance R-curves of the two-hour EXCO-exposed specimens revealed a significant degradation of approximately 11% in the crack growth resistance behaviour (Kcevalues) compared to the baseline (air-exposed) values. Furthermore, secondary intergranular crack formation was also revealed in the plastic zone ahead of, and adjacent to, the crack tip of these specimens; which formed during the crack growth resistance loading. It is postulated that the observed degradation of the Kce values of the EXCO-exposed material is due to hydrogen embrittlement since the exposure times for the EXCO evaluation were limited to ensure that uniform corrosion dominated; that is, significant penetration of corrosion damage and pitting due to localized corrosive attack did not occur. The sodium chloride-exposed specimens revealed a similar degradation (13%) after 24 hours exposure. However, slight intergranular corrosive attack and isolated pitting were observed on the exposed surfaces prior to crack growth resistance loading, resulting in notch effects that could assist in crack growth. Pitting and intergranular corrosion were, however, not observed at the pre-crack tip. The relative contributions of the notch effects and the hydrogen embrittlement during the degradation of the KR performance are, therefore, unclear. Keywords: corrosion, crack growth, aluminium alloy 2024-T3.

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“…Many Al alloy-based aging aircraft have corrosion damage during their service life because of corrosion-induced hydrogen embrittlement mechanisms. [21][22][23] More specifi cally, hydrogen atoms cause lattice defects (e.g. vacancies, dislocations, grain boundaries) and distortions on Al alloys and make them extremely brittle.…”

Section: Aerospace Alloy Corrosionmentioning

confidence: 99%

Nanocoatings for corrosion protection of aerospace alloys

Asmatulu

2012

Corrosion Protection and Control Using Nanomaterials

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Determination of hydrogen absorption in Pd coated Al thin films

Cited by 15 publications

References 9 publications

The influence of hydrogen on the stress-corrosion cracking of low-strength Al-Mg alloys

The influence of hydrogen on the stress-corrosion cracking of low-strength Al-Mg alloys

The crack growth resistance behaviour of aluminium alloy 2024-T3 at slow strain rates after exposure to standard corrosive environments

Nanocoatings for corrosion protection of aerospace alloys

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