I’m am currently testing a method to stop lapidary saw blades from
rusting when using water as a coolant.
I am using a Diamond Pacific Genie for this test. The saw blade has
been in the water for a week now, with out any sign of rust. Before I
started the test, it would rust in a day if I forgot to empty it.
I have attached sacrificial aluminum anode to the motor housing with
a piece of copper wire. The anode is resting on the bottom of the saw
I do not know if this type of protection has been used in lapidary
saws before or not. It is used for protecting water heaters and
I used aluminum for the anode because I happened to have some scrap
1/4" sheet laying around my shop. Magnesium is another metal that is
commonly used as an anode in water heaters. Zinc is commonly used as an
anode in outboard motors.
The metal that is less noble (on the periodic table of elements) in
the circuit will be the one that is sacrificed.
Have I stumbled on to something that has been overlooked or am I just
reinventing the wheel?
Timothy A. Hansen
TAH Handcrafted Jewelry