采用扫描电镜(SEM)、环向拉伸与硬度法观察并测试H2S与CO2环境下渗透后DN100玻璃钢试样的形貌以及力学性能.结果表明,与未渗透试样相比,渗透实验后玻璃钢管内表面缺陷较多,存在大量腐蚀坑;环向拉伸时,55℃渗透后玻璃钢管外层与中间层断裂比较整齐,但内层撕裂;85℃渗透后玻璃钢管外层与内层先开裂,中间层后开裂.渗透后玻璃钢中环氧树脂粉化严重,与纤维脱粘,缺陷孔隙深度增加,85℃时更为明显.55℃、85℃渗透后试样的环向拉伸峰值拉力、巴氏硬度保留百分数以及玻璃化转变温度分别为27.381 kN/26.643 kN、92.5％/86.25％、136.30℃、134.37 ℃.
Morphology and mechanical properties of DN100 glass fiber reinforced plastic(GFRP) after the penetration test in H2S/CO2 condition were observed and measured by means of scanning electronic microscopy (SEM),hoop tensile and hardness tests.The results show that defects of the internal surface of the penetrated GFRP are more than that of the blank sample,and there are many corrosion pits in the internal surface of the penetrated GFRP.When hoop tensile test is done,the fracture at outer layer and middle layer for the permeated GFRP at 55 ℃ is neat,and the outer and inner layer of the GFRP at 85 ℃ split first and then the middle layer splits.The pulverization of the epoxy resin matrix in the penetrated GFRP is more serious,and the epoxy resin debonds with fiber,and the depth of porosity defect increases.This phenomenon is more obvious at 85 ℃.The peak tensile force,the retention percentage of the hardness and glass transition temperature of the penetrated GFRP at 55 ℃ and 85 ℃ are 27.381 kN,26.643 kN,92.5％,86.25％,136.30 ℃,134.37 ℃,respectively.
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