Foaming can result from excessive agitation, improper fluid levels, air leaks, contamination or cavitation - the pitting or wearing away of a solid surface as a result
of the collapse of a vapour bubble. Foaming can cause sluggish operation, air binding in pumps and tank or a sump overflow.
pH is a measure of the coolant's acidity or alkalinity. Whereas a coolant's neutralization number is related to the quantity of acid- or base-forming materials in a
solution, pH indicates their intensity. Coolant pH range should remain between 7.5 and 11 to provide adequate corrosion protection.
the resistivity of a liquid is a measure of its electrical insulating properties under conditions comparable to those of the test. High resistivity reflects low content
of free ions and ion -forming particles and normally indicates a low concentration of conductive contaminants.
This test identifies any rust within the coolant indicating lack of rust inhibitor.
Freezing Point Testing
Tests what point the coolant freeze to ensure it is able to carry out the job it is required to do.
Nitrite is an inhibitor for cast iron, steel and liner cavitation protection. Excessive levels can lead to solder corrosion, precipitate formation and water pump failure.