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Thread: Galvanic corrosion

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    Default Galvanic corrosion

    Is there an issue with galvanic corrosion when using electrically conductive thermal grease, be it liquid metal or copper.

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    Quote Originally Posted by ashiekh View Post
    Is there an issue with galvanic corrosion when using electrically conductive thermal grease, be it liquid metal or copper.
    Pretty sure we already had this conversation, and the answer is "yes".

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    You may well be right concerning my asking before, but this is different from the gallium/aluminum issue as far as I can tell.

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    Just a quick Google search turns up the fact that galvanic corrosion is an electro-chemical reaction, so there has to be electrical conductivity, but apparently, it is most pronounced in the presence of an electrolyte. Soooo, the degree of corrosion may depend on whether or to what extent the non-conductive portion of the paste has electrolytic properties. In other words, keep it away from the Gatorade.

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    Just takes some condensation, so could be an issue in humid environments.

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    Don't most thermal pastes make use of some sort of petroleum or silicone-based medium into which the conductive bits are suspended?

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    Except liquid metal

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    One could argue that liquid metal isn't really a thermal "paste" but yeah I see what you did there.

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    LM corrodes pretty much any metal, aluminium gets outright destroyed by it, copper gets tarnished and nickel plating also gets discolored by LM.

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    Yeah? So unless you have some pretty intense short-term cooling needs or you are a fringe crazy cooling enthusiast, liquid metal may not make much sense.

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