The Corrosion of 1100 Aluminum in Oxygen-Saturated Water at 70°C

Draley, J.E.; Mori, Sotaro; Loess, R. E.

doi:10.1149/1.2425840

Cited by 13 publications

(9 citation statements)

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“…In our own research on the corrosion of 1100 aluminum, it has been observed that at 70~ and below, a heavy layer of porous, not significantly protective, bayerite covers a thinner layer (4,5). This protective layer is believed to be boehmite on the basis of our own (4) and other observations of early formation (6)(7)(8).…”

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confidence: 79%

Oxide Dissolution and Its Effect on the Corrosion of 1100 Aluminum in Water at 70°C

Mori

Draley

1967

J. Electrochem. Soc.

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The rate of corrosion of aluminum in water and in many aqueous solutions is generally believed to be limited by a film of oxide produced as corrosion product. If such a film is dissolving at a sufficiently great rate, it is clear that the corrosion rate will ultimately be determined by the dissolution rate. The rate at which dissolution occurs can be expected to depend on the concentration of aluminum oxide in the water. Such dependences have been reported by Dillon (1) and Dickinson (2) for pressurized water and by Hatcher and Rae (3) for in-reactor water well below the boiling point.In our own research on the corrosion of 1100 aluminum, it has been observed that at 70~ and below, a heavy layer of porous, not significantly protective, bayerite covers a thinner layer (4, 5). This protective layer is believed to be boehmite on the basis of our own (4) and other observations of early formation (6-8). In laboratory exposure to refreshed distilled water, we have seen no evidence that the protective film dissolves or that the corrosion rate is influenced by corrosion product dissolution. In fact, contamination of the water with corrosion product (perhaps alkaline) has increased corrosion. In an effort to resolve these questions specimens have been exposed under circumstances where material balances allow the deduction of the variation of the corrosion product composition with time.Specimens of 1100 aluminum and exposure conditions were the same (continuously refreshed, > 106 ohm-cm H20, saturated with oxygen) as in a previous investigation (5). Effluent water from the test chamber was accumulated by controlled-level evaporation in a flask to which sulfuric acid was originally added. Periodically, this solution was carefully removed, with acid rinsing, to a platinum dish and evaporated to dryness. The residue was dissolved in molten KHSO4; this was then dissolved and analyzed colorimetrically for aluminum content. Extraneous aluminum was found to come from the source water (1-2 ~,g/1), from Pyrex glassware, and from the reagents (notably the KHSO4). Correction was made by operating a blank specimen chamber, using the same water supply as for the chamber containing the specimen and making the identical analysis for aluminum. Sometimes the water flow rates were not identical for the two chambers, necessitating a calculated correction based on the concentration of aluminum in the "blank" water. All glass apparatus was leached for several weeks before use.The amount of metal corroded from a specimen was measured at intervals, using the eddy current gauge developed for the purpose (9). At the same time the dried specimen was weighed, with its adherent corrosion product. The most reproducible drying was obtained overnight at room temperature in a desiccator containing anhydrous calcium sulfate (Drierite). An hour in the constant temperature, constant humidity balance room ensured reproducible readings on the microbalance.Three quantities were thus available as a function of time: weight gain (G), metal loss by corrosion (L),...

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confidence: 79%

Oxide Dissolution and Its Effect on the Corrosion of 1100 Aluminum in Water at 70°C

Mori

Draley

1967

J. Electrochem. Soc.

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“…Draley et al measured the corrosion of 1100 aluminum in oxygen-saturated waster at 70 °C at a 6.5 pH for up to 1.5 years, using two corrosion vessels. [2] Each vessel tested contained multiple samples. The water in the first vessel was refreshed with fresh water while the second received water from the first vessel (carrying corrosion products from the corrosion in the first vessel).…”

Section: Literature Modelsmentioning

confidence: 99%

“…The actual oxide film might be porous, which would tend to increase the thickness for a given mass of oxide. [2], the authors refer to some of their previous findings of aqueous corrosion of 1100, stating that "After sufficiently extended exposure, bits of the corrosion product slough or flake off, leaving a metallic sheen. The corrosion product does not again grow thick in those places, and there is no observable increase in corrosion of the specimens.…”

Section: Literature Modelsmentioning

confidence: 99%

Characterization of Oxyhydroxides on a Dry-Stored Fuel Plate From L-Basin

Olson

Fuentes

d’Entremont

et al. 2018

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“…[96] This corrosion product is a multi-layered aluminum oxide and there is evidence that dissolution of at least one of these layers can have a significant effect on the corrosion rate. [97][98][99][100][101] The dissolution rate is a function of at least three different variables (temperature, pH, and refreshment rate), but there is no generally accepted model of the detailed behavior. Also, care should be taken during storage in air to keep humidity or contamination (e.g., from fingerprints) from plate surfaces, particularly if the plates have not been cleaned and passivated.…”

Section: Corrosion Behaviormentioning

confidence: 99%

Fuels for research and test reactors, status review: July 1982

Stahl¹

1982

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U0 2 U0 2 U0 2 9.Microstructures of U 3 SiAl (U + 3.5 wt% Si + 1.5 wt% Al). Curves A-D show heat-flow data for fuels with x -1.58, 1.65, 1.7, and 1.8, respectively. Lines UL, LL, and MP indicate the upper limit, lower limit, and most probable value, respectively, for the thermal conductivity of fuel with x -1.6. Line A shows pulse-heating data for fuel with x -1.6, which do not agree with curve MP. ABSTRACTA thorough review is provided on nuclear fuels for steady-state thermal research and test reactors.The review was conducted to provide a documented data base in support of recent advances in research and test reactor fuel development, manufacture, and demonstration in response to current U.S. policy on availability of enriched uranium. The review covers current fabrication practice, fabrication development efforts, irradiation performance, and properties affecting fuel utilization, including thermal conductivity, specific heat, density, thermal expansion, corrosion, phase stability, mechanical properties, and fission-product release. The emphasis is on U.S. activities, but major work in Europe and elsewhere is included. The standard fuel types discussed are the U-Al alloy and the UAl -Al and U 3 0 8 -Al dispersion plate fuels, and the U-Al alloy, UZrHx, and U0 2 rod fuels. Among new fuels, those given major emphasis include U 3 Si-Al dispersion and b0 2 caramel plate fuels.

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The Corrosion of 1100 Aluminum in Oxygen-Saturated Water at 70°C

Cited by 13 publications

References 5 publications

Oxide Dissolution and Its Effect on the Corrosion of 1100 Aluminum in Water at 70°C

Oxide Dissolution and Its Effect on the Corrosion of 1100 Aluminum in Water at 70°C

Characterization of Oxyhydroxides on a Dry-Stored Fuel Plate From L-Basin

Fuels for research and test reactors, status review: July 1982

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