conductive grease as a corrosion inhibitor - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 10-05-2011, 04:39 PM Thread Starter
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conductive grease as a corrosion inhibitor

It makes sense to me that a conductive grease, such as the commonly found GB Ox-Guard, would be excellent for preventing corrosion from starting on small areas, such as fasteners. Not only would it seal out oxygen, but it has a lot of sacrificial metal--zinc, i believe. however, i can find no reference for using it as such.
There is a product called no-ox-id, that is less easy to obtain, that makes these claims, but it is harder to find.
Any engineers or chemists out there who would be willing to explain why this would or would not work> I'm doing some rust-proofing this weekend ns was thinking of putting it on fasteners which are not galvanized--a plance rust is known to start. thanks.
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post #2 of 4 (permalink) Old 10-05-2011, 05:29 PM
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putting chemical grease without knowing what metals you are applying it to is like putting diesel into gasoline car.
Long time since I had to deal with corrosion, but never seize or teflon tape worked for me in the past.
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post #3 of 4 (permalink) Old 10-05-2011, 08:33 PM
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There are a lot of rust proofing liquids that are moderately cheap, easy to obtain, easy to use, and work extremely well. I'll try to remember to look at what we use when I go into the shop tomorrow.
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post #4 of 4 (permalink) Old 10-06-2011, 07:02 PM
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I suppose it depends on the kind of fastener we're talking about and the job it's supposed to be doing. Is it an electrical connection, structural, both? Inside, outside, in a very hot or damp environment?

The grease they put on battery terminals does a great job fighting corrosion and it's easy to find but any kind of grease will reduce friction which might be a problem. A rust resistant paint will resist corrosion but could also make the fastener difficult to remove.

Likewise the material of the fastener - brass, stainless steal, galvanized ... Each has their own strength and corrosive properties. You might improve on the original design but maybe not.

What are you trying to do?

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