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A comment on Cat S22 Flip Phone. Parent comment

Re:Cat S22 Flip Phone by robocat on Tuesday May 24, 2022 @06:06PM (#31498046)
DC plus water equals electrocorrosion[1] if the pins are in contact with water. USB 5 Volts is easily enough to corrode most electronics - certainly made a huge mess of one phone I owned that got dunked while charging.

[1] electrocorrosion isn’t used much as a word, but it should be. Google electrolytic corrosion, direct current corrosion, stray current corrosion.

[null] https://knowledge.electrochem.org/encycl/art-c06-cathodic.ht...

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Re:Cat S22 Flip Phone by jacoblambda on Tuesday May 24, 2022 @10:47PM (#31500048)
> electrocorrosion

Isn't that just galvanic corrosion?

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Re:Cat S22 Flip Phone by robocat on Wednesday May 25, 2022 @02:44AM (#31501330)
Galvanic is two dissimilar metals, usually with an electrolyte like wet soil or water. One metal will corrode far faster than the other e.g. zinc sacrificial anode will corrode to protect iron.

Corrosion due to electric currents is different. A few Volts in reverse and you could make iron the anode to corrode and protect a zinc cathode (Cathode and Anode depend on current direction, e.g. they swap when charging a battery).

Two parts made of the same metal can be can be corroded with an electrolyte between them, with low AC or DC voltage driving differences.

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