A durable coating to prevent stress corrosion effects on the surface strength of annealed glass

Gregorio Mariggiò, Sara Dalle Vacche, Roberta Bongiovanni, Christian Louter, Mauro Corrado*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The durability of an innovative polymeric coating recently developed by the authors to prevent stress corrosion in annealed glass is herein examined. The coating, having functional graded properties through the thickness, is optimised to provide a very good adhesion with glass and an excellent hydrophobic behavior on the side exposed to the environment, thus creating a good barrier to humidity, which is the triggering agent for stress corrosion. Three scenarios are analysed in terms of ageing: (i) cyclic loading, accomplished by subjecting coated samples to repetitive loading; (ii) natural weathering, performed by exposing coated samples to atmospheric agents; (iii) artificial weathering, carried out by exposing coated specimens to fluorescent UV lamps, heat and water. The durability of the coating is assessed indirectly, on the base of its residual effectiveness in preventing stress corrosion, by comparing the bending strength, obtained with the coaxial double ring test, of aged coated glass specimens with that of un-coated and freshly coated specimens. The obtained results prove that the proposed formulation is almost insensitive to cyclic loading, maintains a very good performance in case of natural weathering, whereas is slightly more sensitive to artificial weathering.

Original languageEnglish
Pages (from-to)449-462
Number of pages14
JournalGlass Structures and Engineering
Volume6
Issue number4
DOIs
Publication statusPublished - 2021
Externally publishedYes

Keywords

  • Annealed glass
  • Bending strength
  • Durability
  • Polymeric coating
  • Stress corrosion

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