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为了研究温度和CO_2环境对玻璃钢的腐蚀形貌及力学性能的影响,采用扫描电镜(SEM)、红外光谱(IR)分别观察并测试了40、55、70和90℃下腐蚀后试样腐蚀表面与断口形貌、透光率,用力学分析法测试了腐蚀后试样的环向拉伸性能、巴氏硬度以及爆破压力等。结果表明,随温度升高,玻璃钢受CO_2腐蚀后,试样表面腐蚀坑增多,粉化严重。玻璃钢断口由40℃时的浅层碳纤维的机械拉断发展到由90℃时的浅层碳纤维拉断、碳纤维分层和脱粘组成。当温度从40℃增加到90℃时,试样的峰值拉力、断裂时的拉力、变形分别从33.312 kN、32.403 kN、5.750 mm减小到29.812 kN、26.999 kN、5.101 mm,巴氏硬度从64.667HBa减小到61.333 HBa;试样中C-O、C-Cl官能团的透光率分别从75.9%、91.4%减小到59.3%、82.6%,玻璃钢随温度升高因腐蚀造成的老化加速。
In order to study the effects of temperature and CO_2 environment on the corrosion morphology and mechanical properties of FRP, the corrosion surface and corrosion resistance of the samples after corrosion at 40, 55, 70 and 90 ℃ were observed and analyzed by scanning electron microscopy (SEM) and infrared spectroscopy (IR) And fracture morphology, light transmittance, mechanical properties of the test specimens after corrosion ring tensile properties, Barcol hardness and burst pressure. The results show that with the increase of temperature, the surface corrosion pits increase and the powdering becomes serious after the glass fiber reinforced plastic is corroded by CO_2. FRP fracture by 40 ℃ when the shallow carbon fiber mechanical pull off the development by the 90 ℃ when the shallow carbon fiber pull off, carbon fiber delamination and debonding composition. When the temperature is increased from 40 ℃ to 90 ℃, the peak tensile force, tensile force and deformation at break are reduced from 33.312 kN, 32.403 kN and 5.750 mm to 29.812 kN, 26.999 kN and 5.101 mm, respectively. The Barcol hardness changes from 64.667 HBa decreased to 61.333 HBa. The light transmittance of CO and C-Cl functional groups decreased from 75.9% and 91.4% to 59.3% and 82.6%, respectively. The FRP accelerated aging caused by corrosion with temperature rising.