Corrosion mechanism of E-glass of chemical resistance glass fiber in acid environment

Abstract

The corrosion of ECR glass fiber was investigated by the analysis methods of weight loss ratio under different acids and at various durations. Weight loss, leaching of cations, and surface composition of ECR glass fiber were analyzed. The corrosion mechanism of ECR glass fiber in acid environment was also discussed. The experimental results showed that the corrosion degree of ECR glass fiber in different acids obeyed the order: HNO₃>H₂SO₄>HCl. The acid effects on corrosion of ECR glass fiberis were totally different. Hydrochloric acid mainly destroyed the network structure of [AlO₄], while sulfuric acid and nitric acid mainly destroyed the structure of [SiO₄]. The acid resistance of ECR glass fiber is much better than that of E glass fiber due to the generation of intermediate product silicic acid gel Si(OH)₄ during ion exchange. It can adhere to the glass surface to form a thin film and hinder the proceeding of corrosion.

Keywords

ECR glass fiber / corrosion / weight loss / acid resistance

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