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| Corrosion Simulation of Damaged Coating of H62 Copper Alloy Gold-plated Contact |
| Received:May 18, 2019 Revised:June 09, 2019 |
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| DOI：10.7643/issn.1672-9242.2019.12.002 |
| KeyWord:H62 copper alloy gold-plated contact damage of coating crevice corrosion COMSOL simulation blind via |
| Author | Institution |
| WANG Si-huan |
Naval Aviation University, Yantai , China |
| YU Da-zhao |
Naval Aviation University, Yantai , China |
| WANG Teng |
Naval Aviation University, Yantai , China |
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| Abstract: |
| Objective To study the blind via corrosion under the condition of damaged coating. Methods The simulation was carried out with COMSOL software. The influence of the distance between the damage zone (W) and the gap width (H) of the damage zone was discussed. Results The corrosion entered the stable corrosion stage after a very short initial stage, and the current was much longer than the stable stage in the initial stage. The electrolyte potential and the electrode potential were completely different in the initial and stable stages; the anode reaction occurred uniformly in the damaged area; and the cathode reaction focused on the crack mouth in the stable stage; the increase of W and H would increase the current density, but when W was greater than 0.7mm, the effect was very weak and can be considered to be stable. Conclusion The corrosion under the condition of coating damage is the uniform corrosion controlled by the cathode oxygen reduction reaction. The oxygen is quickly consumed in the initial stage and cannot be replenished. The change of W at small time will affect the corrosion. The increase in H will exacerbate corrosion. |
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