Advantex demonstrates superior abilities
01 June 2010
BORON-free Advantex E-CR glass fibres demonstrate superior corrosion resistance compared to E-glass when used as reinforcement in composite structures exposed to sulfuric acid, says its manufacturer Owens Corning.
The US-based company indicates that the results of a study – supported by microscopic and X-ray images – show that its product outperforms standard E-glass reinforcements in stressed laminates in a corrosive environment.
The study combined corrosion and stress testing and later examined the composite laminates. Advantex glass fibres demonstrated superior corrosion resistance compared to E-glass in composite structures exposed to a solution of 10 per cent sulfuric acid, the company says. The study also confirmed previous findings on the leaching mechanism of E-glass in acidic environments.
Ashish Diwanji, vice-president of innovation for the Owens Corning composite solutions business, says the study used glassfibre-reinforced composite rods that were exposed to a one per cent strain for only 72 hours and then immersed in a 10 per cent sulfuric acid solution under no load and at room temperature for an extended period of time. At regular intervals, rods were removed and examined for the effects of corrosion. After one month, the comparison found substantial differences between the non-corroded Advantex glass fibres and corroded E-glass fibres, he states. With E-glass fibres, studies have noted a disappearance of boron and reduction in alumina and calcium, indicating that most of the glass components (except silica) were leached from the strands.
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