What Water Quality Does Metalworking Coolant Need? A Testing and Treatment Guide
Most metalworking fluid problems get blamed on the fluid. A sump starts foaming, or rust shows up on freshly machined parts, or the coolant sours faster than it used to, and the instinct is to switch brands or bump the concentration. Sometimes that’s the right call. Often, the variable nobody checked is the one doing most of the work in the mix: the water.
