目的 研究海洋气候环境对合金钢螺栓的影响.方法 开展合金钢螺栓海南万宁试验站为期24个月的远海户外暴露试验,通过环境扫描电镜(ESEM)和自带的能谱仪(EDS)、拉伸和疲劳力学性能试验机、动电位极化(PC)研究合金钢螺栓力学性能、宏观形貌、微观形貌和腐蚀产物变化.结果 户外暴露24个月后,合金钢螺栓破坏剪力下降了3.4%,破坏拉力下降了7.7%,疲劳寿命下降了41.3%.结论 合金钢户外暴露24个月后发生全面腐蚀,腐蚀对螺栓破坏拉力及破坏剪力性能影响不大,对螺栓疲劳寿命下降影响较大.%Objective To research effects of marine climate environment on alloy steel bolt. Methods Outdoor expo-sure test was carried out for 24 months at Wanning, Hainan site. Mechanical properties, macroscopic morphology, micro-scopic morphology and corrosion product change of alloy steel bolt were researched through SEM, tensile and fatigue machine and potentiodynamic polarization (PC). Results After 24 months of outdoor exposure, the ultimate shear of alloy steel bolts decreased by 3.4%, its ultimate tension decreased by 7.7%, its fatigue life decreased by 41.3%. Conclusion After 24 months of outdoor exposure, the alloy steel bolt has full-scale corrosion, which has little effect on the ultimate tension and shear of bolts and has great impact on fatigue life of bolts.
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