THE CORROSION MECHANISM RESEARCH OF GLASS FIBER REINFORCED VINYL ESTER RESIN COMPOSITES IN SULFURIC ACID SOLUTIONS

Abstract

Abstract: The corrosion mechanism of glass-fiber-reinforced vinyl ester composites was investigated by immersiong composite samples in deionized water and 40wt% sulfuric acid solution at constant temperature of 35℃, 45℃, 55℃, 65℃, and 75℃ for periods up to 1800 hours. Results were characterized through weight gain tests, inductively coupled plasma analysis (ICP), near infrared spectroscopy (NIR), and scanning electron microscopy (SEM). Ion-leaching behaviors show that ion leachability depends on immersion temperature, ion content of fiber, and the character of ions in the sulfuric acid solution. NIR and SEM results show that hydrolysis reaction occurs on resin matrix. The long corrosion data indicate that most of the corrosion mechanisms initiated by sulfuric acid immersion at lower temperature (35℃,45℃,55℃, and 65℃) for 1800 hours are merely at the resin level, and the fiber/resin matrix interface region remains in good condition. Interface corrosion was merely found at the cutting edge of composite immersed in 75℃.

Key words: glass fiber, vinyl ester resin, composites, sulfuric acid solution, ion concentration

CLC Number:

TB332

LI Ya-nan, YU Yun-hua, YANG Xiao-ping. THE CORROSION MECHANISM RESEARCH OF GLASS FIBER REINFORCED VINYL ESTER RESIN COMPOSITES IN SULFURIC ACID SOLUTIONS[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(6): 30-34.

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