Corrosion behaviour and mechanism of basalt fibres in acidic and alkaline environments

摘要

In this study, the corrosion behaviour and mechanism of basalt fibres immersed in H2SO4 and NaOH solutions with a series of concentrations were investigated, and the effects of the H2SO4 concentration on the stress corrosion were also studied. The corrosion is highly concentration-dependent, and the reaction rate directly determines the corrosion level. For H2SO4-corroded basalt fibre, the cracks between the outer layer and the inner core are primarily inclined to form when the ion depletion depth is small, whereas spiral and axial cracks are successively formed when the ion depletion depth is high. (C) 2016 Elsevier Ltd. All rights reserved.