An insight into the corrosion of alkali aluminoborosilicate glasses in acidic environments

Stone-Weiss, Nicholas; Youngman, Randall E.; Thorpe, Ryan; Smith, Nicholas J.; Pierce, Eric M.; Goel, Ashutosh

doi:10.1039/c9cp06064b

Cited by 45 publications

(45 citation statements)

References 74 publications

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“…Putting together the ICP‐AES, XPS, and SR‐IR data, it can be seen that the corrosion mechanism of the glass tested here involves three processes: (a) ion exchange reactions, (b) network dissolution, and (c) silicate network re‐organization 48,49,50,51,52,53,54 . These three processes can be schematically illustrated as in Figure 5.…”

Section: Resultsmentioning

confidence: 90%

“…Putting together the ICP-AES, XPS, and SR-IR data, it can be seen that the corrosion mechanism of the glass tested here involves three processes: (a) ion exchange reactions, (b) network dissolution, and (c) silicate network reorganization. 48,49,50,51,52,53,54 These three processes can be schematically illustrated as in Figure 5. Outside the corrosion front (region I), the glass network has been dissolved into the solution, and the thickness of this fully disintegrated layer ranges from 88 to 169 nm depending on the R value.…”

Section: Resultsmentioning

confidence: 99%

“…The current corrosion mechanism falls into the classical multistep interdiffusion-based mechanism. 48,49 From the ICP-AES and XPS data, it could be seen that these three aspects of corrosion are all affected by R although the R dependence is subtle. These changes could be attributed to different structural roles of Ca 2+ and Mg 2+ ions.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 5 is the results of the combined three processes. The current corrosion mechanism falls into the classical multistep interdiffusion‐based mechanism 48,49 …”

Section: Resultsmentioning

confidence: 99%

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Chemical durability of borosilicate pharmaceutical glasses: Mixed alkaline earth effect with varying [MgO]/[CaO] ratio

et al. 2021

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Figure 5 is the results of the combined three processes. The current corrosion mechanism falls into the classical multistep interdiffusion‐based mechanism 48,49 …”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Chemical durability of borosilicate pharmaceutical glasses: Mixed alkaline earth effect with varying [MgO]/[CaO] ratio

et al. 2021

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“…Vertumnite is structurally very similar to strätlingite, also known as “hydrated gehlenite,” and it can be seen as proof of gehlenite reaction. Traces of gismondine (CaAl 2 Si 2 O 8 ·4H 2 O), that is, a Ca‐based zeolite, 27 and aluminum hydroxide (Al(OH) 3 , gibbsite, PDF#74‐1775) were also detected.…”

Section: Resultsmentioning

confidence: 99%

New glass‐based binders from engineered mixtures of inorganic waste

Hujova

Monich

Kaňková

et al. 2021

Int J of Appl Glass Sci

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Aluminum is one of the most important strategic resources, but the Bayer process, typically applied for the purification of ores, leads to vast amounts of alkaline slurry waste, known as red mud. Though interesting for potential reprocessing, red mud is still predominantly stored in big slurry pools, due to high levels of toxic metals. Toxic ions can be easily immobilized by vitrification, but the high costs of this solution need to be balanced by the reuse of the obtained glass. The present paper is dedicated to the transformation of waste‐derived glass into new binders for the construction industry, according to both “conventional melting” and “smelting” approaches. In the first case, red mud was included in a mixture of waste, designed to yield a reactive glass (CMG), that is, forming stable gels after activation in an alkaline aqueous solution. In the second approach, red mud was subjected to a thermal treatment in a reductive atmosphere, implying the separation of molten iron alloy. The remaining glassy slag, according to its chemical composition (CaO and Al2O3‐rich) underwent gelation by simple interaction with pure water, without any alkaline activator, thus configuring a new “glass cement.”

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Dissolution of Bioactive Glass S53P4 in Continuous Flows of Tris Buffer and Lactic Acid

Siekkinen,

Engblom,

Karlström

et al. 2023

Biomedical Materials & Devices

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In vitro dynamic dissolution of bioactive glass S53P4 particles was studied in a cascade of three reactors. Tris buffer (pH 7.40) and lactic acid (pH 2.00) with flow rates of 0.2 and 0.04 ml/min were fed through the reactors for 24 h. The increased ion concentrations in Tris inflows to the second and third reactors decreased the dissolution of the particles. However, the normalised surface-specific mass loss rate decreased from the first to the third reactor and with decreasing flow rate. No distinct differences were observed in the reaction layers on the particles in the three consecutive reactors. This implied that the ions released in the previous reactors contributed to the reaction layers formed in the following reactors. Highly incongruent dissolution with similar dissolution rates of sodium, calcium, and phosphorus occurred with the two flow rates in lactic acid. Although a thick silica-rich layer formed on the particles, the low pH prevented calcium phosphate layer precipitation. The results imply that S53P4 particles in an implant react at different rates depending on their location but form similar reaction layer morphologies independent of their location in physiological solutions (pH 7.4). On the other hand, S53P4 particles exposed to acidic solutions with a pH < 5 likely dissolve incongruently, leaving a slowly dissolving Si-rich layer. In such an environment, the dissolution rates of Na, Ca, and P are independent of the location of the S53P4 particle in the implant. Thus, the pH and fluid flow are critical factors for the dissolution of S53P4 bioactive glass particles.

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An insight into the corrosion of alkali aluminoborosilicate glasses in acidic environments

Abstract: Sodium aluminoborosilicate glasses with wide-ranging compositions and structures corrode according to remarkably similar mechanisms in acidic environments.

Cited by 45 publications

References 74 publications

Chemical durability of borosilicate pharmaceutical glasses: Mixed alkaline earth effect with varying [MgO]/[CaO] ratio

Chemical durability of borosilicate pharmaceutical glasses: Mixed alkaline earth effect with varying [MgO]/[CaO] ratio

New glass‐based binders from engineered mixtures of inorganic waste

Dissolution of Bioactive Glass S53P4 in Continuous Flows of Tris Buffer and Lactic Acid

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