Abstract:In the present research, we studied the corrosion resistance of commercial aluminum alloys exposed to ethanol produced in the northeastern region of Argentina and to commercial ethanol as reference medium. Electrochemical tests of potentiodynamic polarization and weight loss were performed by immersion at temperatures below the boiling point of ethanol (25 °C, 40 °C and 50 °C). The results showed that the increase in the corrosion rate of the alloys is directly proportional to the increase in the temperature o… Show more
“…The corrosion rate value is representative of general surface deterioration. However, the anodic slope configuration shows sample B1 and B2 exhibits relatively weak resistance to anodic dissolution and pitting corrosion which is a major destructive mechanism on composites [26]. Decrease in corrosion potential data from À0.756 V to À0.879 V in Table 4 from sample A to B4 confirms the effect of localized deterioration on the matrix samples.…”
“…The corrosion rate value is representative of general surface deterioration. However, the anodic slope configuration shows sample B1 and B2 exhibits relatively weak resistance to anodic dissolution and pitting corrosion which is a major destructive mechanism on composites [26]. Decrease in corrosion potential data from À0.756 V to À0.879 V in Table 4 from sample A to B4 confirms the effect of localized deterioration on the matrix samples.…”
“…This kind of chemical 'dry corrosion' takes place in alcohols with low water content at temperatures above 80 °C mostly in form of circular corrosion pits and the corrosion reaction is particularly rapid capable of causing component failures in few minutes. Moreover, alcoholate corrosion, due to low electrical conductivity of electrolyte (ethanol), is believed to be a predominantly chemical kind of reaction, which highly depends on physical, chemical and physico-chemical factors such as: water content, temperature, presence of certain alloying elements in aluminium, ethanol impurities and the (metallic) surface condition [10][11][12][13][14][15]. Equations (1)(2)(3) give an overview on the involved reactions [16]:…”
Section: Alcoholate Corrosion Of Aluminium Alloysmentioning
confidence: 99%
“…This kind of chemical ‘dry corrosion’ takes place in alcohols with low water content at temperatures above 80 °C mostly in form of circular corrosion pits and the corrosion reaction is particularly rapid capable of causing component failures in few minutes. Moreover, alcoholate corrosion, due to low electrical conductivity of electrolyte (ethanol), is believed to be a predominantly chemical kind of reaction, which highly depends on physical, chemical and physico‐chemical factors such as: water content, temperature, presence of certain alloying elements in aluminium, ethanol impurities and the (metallic) surface condition [10–15]. Equations (1–3) give an overview on the involved reactions [16]:…”
In fuel‐bearing components, particularly in automotive applications operating at elevated temperatures, the durability of light metals is significantly influenced by their susceptibility to alkoxide corrosion. Alkoxide corrosion is characterized by its spontaneous nature and exceptionally rapid degradation of materials once initiated. This study presents an innovative high‐pressure and high‐temperature micro‐reactor, which enables precise measurements with superior sensitivity for determining the exact initiation times and reaction rates of pitting corrosion. Exemplified tests of surface roughness and water content effect on pitting initiation times were conducted and data was generated for a numerical phase field model to demonstrate the reactor capabilities. Experimental findings suggest that impurities present on both the material surface and in the fuel exhibit a significant influence on corrosivity, thereby affecting the reliability of the components. Moreover, the experimental data points have been utilized to extract the corrosion kinetics and calibrate the numerical model. The initial findings successfully demonstrate the ability to replicate corrosion kinetics and accurately represent pit morphologies and estimate reaction‐related parameters in a predictive manner.
“…Although the corrosion potential of Al alloys declines as the chloride ion content in the medium rises, the corrosion current density remains almost constant at pH 3.0 up to a chloride content of 1000 mg/kg (Soares et al 2017). Once chloride penetrates the passivation Al 2 O 3 layer, the pitting corrosion process is triggered (Kramer et al 2018). The result of this reaction is the dissolution of Al into the wine (Figure 1).…”
Background and goalsAluminum cans represent an alternative wine packaging, offering a wide range of styles. Despite the fast-growing nature of the product category and the great market forecast, there is valid concern about the quality of wines in a can. Unfortunately, this leads to the consumer perception that these wines are low-quality products, which m us t b e a d d resse d by th e wine industry.
Methods and key findingsCanned wines have a limited shelf life, as they often display unpleasant reductive characteristics (e.g., rotten egg and cooked vegetable off-flavors). Aluminum corrodes in the acidic pH of wine and reacts with sulfur dioxide to yield hydrogen sulfide.
Conclusions and significancePreparing wine for canned packaging requires extra effort to understand the implications of wine redox chemistry. The wine's chemical parameters at bottling (in particular, the levels of sulfur and metals) must be managed, and the degradation of the can lining must be limited.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.