Metallic components within a device may be subject to corrosion due to moisture entering the device. The corrosion of these components may be mitigated by including an additional, or sacrificial, anode. The sacrificial anode may be added to a substrate, such as a printed circuit board, within the device.
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Ding, Yao and Temperton, Fred, "Wearable Device Mic Corrosion Mitigation", Technical Disclosure Commons, (May 05, 2022)