The work aims to study the environmental adaptability of airborne PCB(Printed Circuit Board,PCB)in tropical marine atmospheric environments by analyzing its characteristics and electrical performance degradation patterns.According to the situation where the tropical marine atmospheric environment was mostly enclosed or semi enclosed inside the cabin,natural environmental tests were designed and carried out for 3 years on the exposed field under the canopy of the Wanning Marine Platform in Hainan and the outdoor simple shielding glass frame in a certain sea area of the Nansha environment.The solder joints,pads,printed wires and lead heads of the PCB had different degrees of corrosion damage in the two test environments,and the corrosion degrees of all parts in the later stage of the test reached level 4.The on-resistance increased from tens of mΩ to tens of MΩ,and the insulation resistance decreased from more than 10 GΩ to MΩ.Finally,the PCB after 2 years of testing at Wanning Station and 3 years of testing in a sea area cannot meet the requirement of technology(AC 500 V,60 s).The environ-mental adaptability of the exposed field under the shed of Wanning Marine Platform to PCB is more severe.
维普
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