Abstract

The corrosion mechanism of the glass fibers (GFs) in the sulfuric acid environments with different times, temperatures, and concentrations were studied. The change of surface morphology, weight, composition, and tensile strength of the GFs in the corrosion process was discussed. The results indicated that the evolution of surface morphology, weight, and composition of the E-type GFs was increased by raising the significant investigated parameters. Moreover, the response surface morphology (RSM) was applied to analyze the corrosion process comprehensively. The effects of variables on the tensile strength retention (TSR) of E-type GFs and the relative pH (pHR) of the sulfuric acid solution have been investigated. The predicted TSR and pHR values had correlation coefficient higher than 90% with experimental observation, according to the obtained RSM model. The RSM model established that the special effects of the H2SO4 concentration elevated more than temperature and time on the corrosion process of E-type GFs. Finally, the corrosion mechanism of E-type GFs in sulfuric acid was attributed to two main reactions, including metal with hydrogen ion exchange reactions and fracturing of the Si-O-Si band. The results evaluated that the RSM is a very suitable approach for analyzing and modeling of the corrosion mechanism of E-type GFs in sulfuric acid.

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