典型螺栓/螺母装配件湿热海洋大气环境适应性研究  

Adaptability Research of Typical Bolt/Nut Assembly Parts in Humid and Hot Marine Atmospheric Environment

作　　者：张世艳[1] 张伦武[1] 杨小奎[1] 吴帅[1] 周堃[1] 符朝旭[1,2] ZHANG Shi-yan;ZHANG Lun-wu;YANG Xiao-kui;WU Shuai;ZHOU Kun;FU Zhao-xu(Southwest Institute of Technology and Engineering,Chongqing 400039;Hainan Materials Corrosion in Atmospheric Environment,National Observation&Research Station,Wanning 571522,China)

机构地区：[1]西南技术工程研究所,重庆400039 [2]海南大气环境材料腐蚀国家野外科学观测站,海南万宁571500

出　　处：《装备环境工程》2021年第11期151-156,共6页Equipment Environmental Engineering

摘　　要：目的研究典型螺栓/螺母装配件在湿热海洋大气环境下的适应性。方法在万宁大气环境试验站开展螺栓/螺母装配件为期24个月的户外暴露试验,通过环境扫描电镜(SEM)、电化学试验、力矩测试,研究螺栓/螺母装配件在我国湿热海洋大气环境中的腐蚀行为和力矩变化规律。结果装配件组合30CrMnSiA镀镉钝化螺栓与30CrMnSiA镀镉钝化螺母(组合A)、30CrMnSiA镀镉钝化螺栓与30CrMnSiA镀锌钝化螺母(组合B)、30CrMnSiA镀镉钝化螺栓与0Cr16Ni6钝化螺母(组合C)对应的电偶腐蚀电流分别约为0.6、37、100μA,装配状态下组合C户外暴露24个月后最大拧出力矩增加53%。结论装配导致的电偶腐蚀效应对螺栓/螺母紧固件的性能变化具有明显影响,非装配状态下30CrMnSiA镀镉钝化螺栓在万宁户外暴露期间没有出现基体腐蚀现象,而装配状态下组合C在万宁户外暴露期间出现较为严重的基体锈蚀,造成在户外暴露期间最大拧出力矩呈不断增加趋势。To study the adaptability of typical bolt/nut assembly parts in humid and hot marine atmospheric environment.The outdoor exposure test of bolt/nut was carried out in Wanning atmosphere environment test station for 24 months.The corro-sion behavior and torque variation law of bolt/nut assembly in humid and hot marine atmospheric environment were studied by environmental scanning electron microscope(SEM),electrochemical and torque test.The galvanic corrosion current corre-sponding to assembly A(30CrMnSiA cadmium plating passivation bolt and 30CrMnSiA cadmium plating passivation nut),as-sembly B(30CrMnSiA cadmium plating passivation bolt and 30CrMnSiA zinc plating passivation nut),assembly C(30CrMnSiA cadmium plating passivation bolt and 0Cr16Ni6 passivation nut)was about 0.6,37,100μA respectively,the screw torque of assembly C under assembly state increased by 53%after 24 months of outdoor exposure.The performance of bolt/nut fastener was obviously influenced by the galvanic corrosion effect caused by assembly.There was no corrosion of 30CrMnSiA cadmium plated passivation bolt in non-assembly state during outdoor exposure in Waning,while assembly C under assembly condition had more serious matrix corrosion,which caused an increasing trend of the maximum torque during outdoor exposure test.

关 键 词：螺栓螺母装配件 户外暴露试验 电偶腐蚀 扭矩 

分 类 号：TJ04[兵器科学与技术—兵器发射理论与技术]