Method for monitoring and controlling metalworking fluid

Abstract From the Canadian patent

The total alkalinity of an aqueous metalworking fluid is monitored and controlled by a continuous titration method that continuously supplies a stream of the metalworking fluid at a known, controllable, flow rate, to a flow through chamber having therein a static mixing element. Simultaneously and separately a stream of acid titrant of, known acid concentration is injected into the flow through chamber at a known controllable flow rate. The acid titrant and metalworking fluid mix and react in the chamber and the reacted metalworking fluid exiting the chamber passed over the tip of a pH electrode. The pH of the reacted metalworking fluid is continuously monitored and the output of the pH …