To ensure the long-term reliable use of typical electric lap joints of helicopters in the marine environment,this paper selected the copper strips and aluminum alloy electrical lap joints in a semi-enclosed structural area.According to the specific environmental spectrum of the accelerated test in the marine environment,an accelerated test consisting of 10 cycles was conducted.After the 4th cycle of the test,the corrosion depth of the aluminum alloy exceeded 10%of its total thickness.After the 10th cycle of the accelerated test,the corrosion depth exceeded 90%of the total thickness,indicating a relatively severe degree of corrosion.Through the analysis of the causes of corrosion,it was found that the poor sealing effect at the lap joint was the key factor leading to the corrosion.By improving the size and process of the fillet seal,the copper strips and aluminum alloy electrical lap joints successfully passed the 10-cycle accelerated test evaluations,and the improvement measures effectively enhanced the corrosion resistance of the copper strips and aluminum alloy electrical lap joints in the marine environment.
关键词
电搭接件/异种金属/填角密封/抗腐蚀性能/加速试验环境谱
Key words
typical electric lap joints/dissimilar metals/fillet sealing/corrosion resistance/accelerated test environmental
维普
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