I want to grind smooth the sides of some of my files to make them safe edges. I don't want the heat from grinding to ruin the temper so will need to dunk it into coolant every so often. I don't want to use oil based products since they'll leave residue and gunk up the teeth. Water on its own can make the file start to rust while I'm grinding.
Is there anything I can add to water to slow down the rust causing effect long enough to get through the grinding and then dry the file completely with a hair dryer? I think I read somewhere that a high pH can do it, but can't remember where or how effective. If so, would adding baking soda or ammonia do it, and in what ratio to water?
Is there anything I can add to water to slow down the rust causing effect long enough to get through the grinding and then dry the file completely with a hair dryer? I think I read somewhere that a high pH can do it, but can't remember where or how effective. If so, would adding baking soda or ammonia do it, and in what ratio to water?