Potential of Aluminum in Aqueous Chloride Solutions

Hagyard, T.; Earl, WB

doi:10.1149/1.2426708

Cited by 39 publications

(8 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The OCP drop at the beginning of the test could be linked to the dissolution of the protective oxide [27]. Importantly, Hagyard et al showed that the potential rose to a peak at the beginning of the immersion and that this increase was attributed to the dissolution of aluminum and to the formation of the protective oxide [28,29]. This reaction was very quick and, thus, is rarely observed, which was the case in this study because no peak was visible in Fig.…”

Section: Corrosion Susceptibility Of the 2050 Alloy During Continuous Immersion Testsmentioning

confidence: 49%

Effect of varying conditions of exposure to an aggressive medium on the corrosion behavior of the 2050 Al–Cu–Li alloy

et al. 2014

View full text Add to dashboard Cite

The corrosion behavior of aluminum alloy 2050 was studied as a function of varying conditions of exposure to an aqueous NaCl solution. Two metallurgical states were considered, i.e., an as-received alloy (NHT) and aged samples (HT). After continuous immersion tests, the NHT samples were susceptible to intergranular corrosion, whereas intragranular corrosion was observed for the HT samples. For the NHT samples, cyclic corrosion tests, with alternate immersion -emersion periods, induced subgrain boundary dissolution, and for the HT samples, grain and/or subgrain boundary sensibilization was induced. Hydrogen content measurements suggested a hydrogen enrichment of the alloy under cyclic corrosion tests.

show abstract

Section: Corrosion Susceptibility Of the 2050 Alloy During Continuous Immersion Testsmentioning

confidence: 49%

Effect of varying conditions of exposure to an aggressive medium on the corrosion behavior of the 2050 Al–Cu–Li alloy

et al. 2014

View full text Add to dashboard Cite

show abstract

“…In the present investigation, the presence of Al(OH) 3 illustrated the hydration of Al 2 O 3 and formation of Al(OH) 3 during the salt spray test. The binding energy of Cl 1 s was approximately 199.3 eV, corresponding to corrosion products after fretted in NaCl, and it was believed that Al(OH)Cl X was produced in SST after the sample immersed in salt fog for long time 41 . The obtained at.% of chlorine on SAOF and PAOF were about 4% and 23%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Novel anodic oxide film with self-sealing layer showing excellent corrosion resistance

Zhao

Wang

et al. 2017

Sci Rep

View full text Add to dashboard Cite

In the present work, the novel anodic oxide film (AOF) with self-sealing layer was successfully fabricated on 2024Al alloys by using an improved anodic oxidation method. The presence of the self-sealing layer on the porous layer of AOF was verified by Field emission scanning electron micro scope. Confocal laser scanning microscope (CLSM) and X-ray photoelectron spectroscopy (XPS) were used to evaluate the morphology and the corrosion products of the AOF after salt spray test. The microhardness test showed that the self-sealing AOFs still displayed high hardness even after salt spray test. Electrochemical test and salt spray test results illustrated the excellent corrosion performance of the novel structured self-sealing anodic oxide film (SAOF) compared with common porous AOFs. The narrow diameter makes it difficult for chlorine ions ingress into the pores of SAOFs. The self-sealing layer played an important role in protecting the SAOF from corrosion.

show abstract

“…While both scratch repassivation current and potential transients have been used by previous investigators to understand passivity for many years, [31] previous work was concerned primarily with producing data for modeling stress corrosion cracking or corrosion fatigue crack propagation rates or for comparing the pitting behavior of alloys. [20,21,[32][33][34][35] This is the first time that these two types of experiments have been used together to compare the anodic and cathode rate-limiting conditions for fatigue cracks in two alloys. Even though no significant difference was revealed by these tests, ruling out any contribution of a difference in repassivation rates was a significant result that dramatically reduces ambiguity in the conclusions of this study.…”

Section: A Failure Mechanismmentioning

confidence: 99%

Electrochemical evaluation of a corrosion fatigue failure mechanism in a duplex stainless steel

Stoudt

Ricker

2004

Metall Mater Trans A

View full text Add to dashboard Cite

Laboratory corrosion fatigue studies on smooth and precracked samples indicated that two duplex stainless steels would have similar service lives in a paper-processing environment; but, in service, one of these alloys has exhibited premature failures. Since corrosion fatigue experiments had proven unable to detect this failure mechanism, electrochemical measurements and slow strain rate tensile tests were used to evaluate four alloy composition-dependent failure mechanism hypotheses. No significant differences were found in the dissolution rates or hydrogen fugacities produced when mechanical processes expose bare surface, and slow strain rate tensile tests found no indication of a difference in cracking susceptibility for the same hydrogen fugacity. Electrochemical experiments found that pits nucleate in one phase of the duplex microstructure at lower potentials in the failure prone alloy, but do not propagate beyond the microscopic dimensions of this phase. These microstructurally limited "micropits" were found to nucleate fracture in slow strain rate tensile tests, and examination of a service failure confirmed the presence of microscopic pits at crack initiation sites. The premature failures are attributed to the lower pitting resistance of the failure prone alloy, and the failure of laboratory experiments to predict this behavior is attributed to the slow kinetics of pit nucleation in these experiments. A laboratory testing methodology is suggested that will ensure detection of similar susceptibilities in future corrosion fatigue testing programs.

show abstract

Potential of Aluminum in Aqueous Chloride Solutions

Cited by 39 publications

References 3 publications

Effect of varying conditions of exposure to an aggressive medium on the corrosion behavior of the 2050 Al–Cu–Li alloy

Effect of varying conditions of exposure to an aggressive medium on the corrosion behavior of the 2050 Al–Cu–Li alloy

Novel anodic oxide film with self-sealing layer showing excellent corrosion resistance

Electrochemical evaluation of a corrosion fatigue failure mechanism in a duplex stainless steel

Contact Info

Product

Resources

About