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| Corrosion Damage Behavior of Printed Circuit Board in Simulated Marine Environment |
| Received:April 16, 2021 Revised:June 15, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.12.011 |
| KeyWord:printed circuit board accelerated corrosion test on resistance insulation resistance corrosion damage law |
| Author | Institution |
| ZHAN Gui-pan |
Naval Aviation University Qingdao, Qingdao , China |
| TAN Xiao-ming |
Naval Aviation University Qingdao, Qingdao , China |
| PENG Zhi-gang |
Naval Aviation University Qingdao, Qingdao , China |
| ZHANG Dan-feng |
Naval Aviation University Qingdao, Qingdao , China |
| WANG De |
Naval Aviation University Qingdao, Qingdao , China |
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| Abstract: |
| This paper aims to study the corrosion damage behavior and law of printed circuit board in airborne equipment cabin in laboratory simulated marine environment. The accelerated corrosion test environment spectrum was compiled based on the measured marine environment data of the airborne equipment cabin of a certain type of aircraft. The accelerated corrosion test was carried out for the electroless nickel plated gold printed circuit board. The corrosion behavior parameters, such as macro and micro corrosion appearances, on resistance and insulation resistance, were used to analyze the general law of corrosion damage evolution of printed circuit boards in laboratory simulated marine environment. In simulated marine environment, the corrosion of printed circuit board was firstly induced from the pins and through-holes of components, which seriously affected the stability of electrical properties such as on resistance and insulation resistance. During the accelerated corrosion process, the on resistance of printed circuit board increased continuously, and the insulation resistance decreased. In the 6th cycle, the insulation resistance decreased by an order of magnitude. In the 14th cycle, the on resistance increased by 4.32~6.72 mΩ, and the insulation resistance decreased to 0.55~0.78 GΩ, by two orders of magnitude, and the printed circuit board basically lost its insulation performance. In conclusion, in simulated marine environment, the corrosion damage process of printed circuit board can be divided into three stages:surface coating corrosion, occurrence and expansion of base metal corrosion, and component core cavity corrosion and failure. |
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