航空煤油中微生物对飞机油箱密封胶性能影响

Impact of Microbes in Jet Fuel on Performance of Sealant of Aircraft Fuel Tank

摘要: 依照ASTM标准制备飞机油箱密封胶(锰固化聚硫密封胶)试片，进行了航空煤油及航空煤油中微生物(硫酸盐还原菌(SRB)的浸泡对比实验。测量试片硬度、拉伸强度、断裂伸长率和体积膨胀率的变化。结果表明，锰固化聚硫密封胶(PR-1440, B-2)在37℃含有SRB的航空煤油中浸泡60天后，SRB的存在降低了密封胶的硬度，使其体积发生收缩，破坏了密封胶的部分结构，使得密封胶的拉伸强度、断面伸长率降低。

Abstract: In accordance with the criterion of ASTM, test pieces of the aircraft fuel tank sealant (Manganese Polysulfide Sealant) were made. The immersion comparison experiments were respectively con-ducted in aviation kerosene with or without microorganism SRB. The properties of test pieces were measured including hardness, tensile strength, fracture elongation and the change of volume expansion ratio. Results indicated that after 60 days of Manganese Polysulfide Sealant (PR-1440, B-2) soaking in aviation kerosene containing SRB with the temperature of 37℃, the existence of SRB resulted in hardness deceasing, volume shrinking, partial structure of the sealant damaging, tensile strength and fracture elongation decreasing.