Cheese said:
As I mentioned before, last fall I ripped a bunch of maple with the Mafell 48 tooth blade. I placed the saw back in the systainer and this spring this is what the blade looked like.
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I used some Permatex gel to clean it up and it removed the rust but the phosphoric acid in the Permatex turned it black. I then attached some green Vlies to an ETS EC 125 and that finished the cleaning process nicely with a final coating of Boeshield.
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I wrote about VCI (Vapor Corrosion Inhibitor) paper in another thread just this morning. We used to use this stuff to control rust while we were waiting to send the parts out for plating.
The paper emits a vapor that will combine with the free oxygen in a closed container (like, for instance, a Systainer. The vapor (harmless to breath) is emitted by the paper and is heavier than air, so it settles in the closed container.
Nothing is applied to the surfaces of the metal. It simply removes the oxygen from the closed container.
This works best for things like your saw blades that are not accessed frequently. If you keep opening the container, you will have to replace the paper more frequently.
Our company bought these sheets directly from the manufacturer. However, both U-Line and Amazon sell it in smaller quantities.
https://www.uline.com/Grp_89/VCI-Pr...mZqAow47M7j22mRVmQ_2jIf8QdE5iKjkaAjJjEALw_wcB
It is interesting to note that almost all corrugated carton material emits sulfur, and since that gas is also heavier than air, it settles to the bottom of the carton. It wreaks havoc on finishes. Worse yet, because the gas settles to the bottom, just the pieces on the bottom are affected. It gives the appearance that we were burying the bad parts on the bottoms of cartons.
At any rate, throw a sheet of the paper (looks like heavy duty brown kraft paper) in a Systainer, and you will not see this type of rusting again.
Do note, if the blade is especially clean of oils, rust will start to form almost immediately. You can see rust form on very clean steel in just a few hours if it is humid out there.
Brake rotors show that effect. They are constantly wiped clean and if left outside on a rainy day, the next morning you will start to see rust.
Go back and wipe some WD40 on those nice clean saw blades.