Hi all,
I was hoping for some advice regarding some coolant issues i've been having.
I have been using Shell Dromus B (http://www.shellusserver.com/products/pdf/DromusB.pdf) coolant for my milling machine and have been having issues with rust formation on my milling table and especially on Kurt Vices. If i leave the vice overnight s/u on the table, the vice will corrode the table surface and leave a black outline which can actually be felt with your nail. The vice will develop black markings on it where the jaws sit, even over the course of a days machining. My shop is not heated however there must be better products available. I have been decreased my mixture ratio from ~20:1 to ~10:1 with no success.
It should be noted that i have not changed out the coolant entirely in roughly 10 months and i don't have anything to check the exact coolant concentration. I am not sure if a contamination issue can cause this but i was hoping someone else would have some recommendations for way better corrosion resistant coolants.
95 percent of my machining is of aluminum.
Thanks for the input.