Inhomogeneous glass surfaces resulting from rapid forming operations – evidence from differential corrosion

Carnali, J. O.; Lugo, Guillermo Manuel; Sharma, Anju; Jain, Himanshu

doi:10.1016/j.jnoncrysol.2004.06.010

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…The concentration differences emphasize during dishwashing process in the form of the irreversible damage which are the most visible on the outer side of the glass. Outer side of the glass article used to be more often in contact with flame during thermal treatment process therefore the inner side of the glass is usually more chemical stable than the outer side [9,10,14,15,16].…”

Section: Resultsmentioning

confidence: 99%

“…The physical changes in local areas of the glass surface appear till after contact of glass with dishwashing solution. Carnali [10] has focused on the development of corrosion pattern during corrosion process and explained why the different regions on the glass surface separated by distances of millimetres have same/similar susceptibilities to the corrosion process.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanism of Generation of Tableware Surface Defects during Dishwashing Process

Petruskova

Vrábel

Šajgalı́k

2008

AMR

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Glass is generally considered to be a chemically stable material at the normal conditions. However, during dishwashing process the tableware glass surface is attacked by detergent water solution at elevated temperatures for different time. It results in different type of irreversible glass surface damage such as milky effect/white layer, iridescence and line corrosion. The goal of this study was to classify and identify different types of the glass surface damages after dishwashing process and find the mechanism of their creation. EDX indicated that the iridescence was characterized by a difference in composition due to the enrichment in Na and Al with S and depletion in Ca, Ba and K in comparison with surrounding glass. The white layer of corrosion products contained high and/or low amount of alkali/alkali earth elements, as originated from detergent washing solution. The following mechanism of glass corrosion was proposed (i) surface dealkalization and alkali leaching into water solution, (ii) glass network dissolution and (iii) precipitation reactions. Glass defects were influenced by parameters related to the aggressive environment, temperature, residual hardness of water, and also to the technology of glass melting and forming.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%