Abstract: Limestone wet desulfurization has been mainstream during practical process of coal-fired generating units built in China. However, salt spray take a significant role in detachment of chimney lining materials caused by wet flue gas. In this paper, glass fiber/vinyl ester composites was fabricated based on the low-costing process of vacuum assisted molding (VARTM) process and its mechanical properties was investigated in natural salt spray environment simulated by salt spray testing chamber for 4 days, 14 days, 28 days and 60 days to evaluate corrosion resistance. Meanwhile, cross-reference of corrosion was observed with the help of SEM to reveal the microscopic mechanism and evolution law of surface morphology. The results show that the mechanical properties of the composites are increased and then decreased with the increase of the days of salt spray corrosion. After 60 days of salt spray corrosion, tensile strength, bending strength and interlaminar shear strength respectively decreased by 5.6%, 12.71% and 13.61%. The morphological characterization showed that the resin matrix exploded and cracked after salt spray corrosion, and defects were formed at the fiber-resin interface, which led to a decrease in mechanical properties.

Key words: lining anti-corrosive, composite material, VARTM process, salt spray corrosion, performance
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