Influence of the Manufacturing Process on Corrosion Behavior of Soda‐Lime‐Silicate Glassware

Abstract

The reaction of soda‐lime‐silicate glassware with model cleaning solutions gives rise to a systematic pattern of inhomogeneous corrosion. This corrosion is not uniform on the entire surface, but is localized only to certain regions of the glassware. The surface composition, as determined by X‐ray photoelectron spectroscopy, and the microstructure, as characterized by optical and scanning electron microscopy, vary considerably in different regions of the glassware. The visibly heterogeneous corrosion pattern, which correlates with the compositional and structural inhomogeneities, is explained in terms of surface conditions that exist during different stages of glass manufacturing. The role of sodium disilicate in solution is also explored for promoting inhomogeneous glass corrosion.

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

“…X-ray microprobe (via a JEOL 6300F scanning electron microscope), as described previously [4,5], was employed for compositional mapping of the glass surface. However, this technique lacked in its ability to recognize subtle differences in surface composition.…”

“…In a recent publication [4], we proposed a mechanism whereby a glass surface can become chemically heterogeneous as a result of the operations used in its formation. For articles formed via rapid glass expansion, as in the press and/or blow process, it was hypothesized 0022-3093/$ -see front matter Ó 2004 Elsevier B.V. All rights reserved.…”

“…In an early report on the subject [1], this problem was referred to as Ôpermanent filmingÕ, because the affected glass appeared etched and could not be returned to the pristine state. Altenschöpfer [2] referred to such damage as ÔstreaksÕ, and Ôsymmetric cloudingÕ, and images of affected articles have appeared in the literature [2][3][4][5]. Fig.…”

Effects of Ion-Exchange and Hydrolysis Mechanisms on Lead Silicate Glass Corrosion

“…[9][10][11] At the start of the corrosive attack, the ion-exchange mechanism governs the process. [12][13] With severe network destruction, hydrolysis becomes prevalent causing silicon removal.…”

Effect of additional applied thermal/electric field on the float-glass surface

“…Prevopis investigations showed that the weathering of common soda-lime-silica glass was dominated by an ion exchange mechanism, where the network modifiers Na + as well as Ca 2+ were leached out of the glass and hydrogen or hydrogen bearing species were incorporated into the silicate structure [4][5][6][7][8][9][10][11][12][13][14] . The weathering and corrosion mechanisms, especially in the case of soda-lime-silica float glass, were studied [15] .…”