应力对纤维增强塑料排烟内筒耐腐蚀性能的影响

针对燃煤电厂烟囱纤维增强塑料排烟内筒工程中应用的纤维增强复合材料试样S-1设置了5种实验条件，即条件A（静态浸泡）、条件B（Ⅰ型应变，应变4.61%）、条件C（Ⅰ型应变+静态浸泡）、条件D（Ⅱ型应变，应变5.89%）、条件E（Ⅱ型应变+静态浸泡），以探究不同实验条件下试样性能的变化。力学性能测试结果表明：不同实验条件下，试样力学性能出现了不同程度的下降，相对于条件B，试样在条件D下弯曲强度保留率、拉伸强度保留率分别下降了2.98%、9.52%；相对于条件C，试样在条件E下弯曲强度保留率、拉伸强度保留率分别下降了5.92%、4.42%。扫描电子显微镜（SEM）研究发现，试样S-1在条件E下经90 d的实验周期后，表面破坏较为严重，有明显的纤维拔出现象，巴氏硬度测试也表明试样在不同条件下的表面状态发生了变化。红外图谱结果表明，试样在条件E下的水解程度大于条件C。

Effect of stress on corrosion resistance of fiber reinforced plastic exhaust inner cylinder

To explore the properties and performance of the fiber reinforced composite sample S-1, which was used in the chimney fiber reinforced plastic exhaust pipe project of coal-fired power plants, five test conditions were set, which were respectively written as condition A (static immersion), condition B (type I strain), condition C (type I strain+static immersion), condition D (type Ⅱ strain) and condition E (type Ⅱ strain+static immersion), wherein the type I strain is 4.61% and the type Ⅱ strain is 5.89%. The mechanical properties test results showed that the mechanical properties of the samples have decreased to different extents under different experimental conditions. Compared with the condition B, the bending strength retention ratio and tensile strength retention ratio of the samples decreased by 2.98% and 9.52% respectively under the condition D; Compared with the condition C, the bending strength retention ratio and the tensile strength retention ratio of the sample decreased by 5.92% and 4.42% under the condition E. The scanning electron microscopy (SEM) study found that the sample S-1 was subjected to the condition E. After 90 days experimental period, the surface damage was more serious, and there was obvious fiber pull-out phenomenon. The Barcol hardness test also showed that the surface state of the sample changed under different conditions. The Fourier infrared spectrum (FT-IR) results showed that the degree of hydrolysis of the sample under condition E was greater than that of the condition C.