Determine if a solution or surface is acid of alkaline in nature. Acids form when certain gases are dissolved in water, for example chlorine in water produces hydrochloric acid, carbon dioxide in water produces carbonic acid, sulfur dioxide in water produces sulfuric acid all of which are corrosive to steel.
The presence of these contaminants can either be detected in a solution washed from the surface of by putting a wet pH test strip on to the dry surface. pH does not measure the concentration but it does indicate how acidic or alkaline the surface is. Alkaline surfaces are normally associated with either concrete surface that are to be coated or steel re-enforcement bar buried in concrete.
The Elcometer 148 pH Tester is a simple, easy to use instrument measuring both pH and temperature using a single sensor.
pH is the measure of acidity of a liquid. The pH scale ranges from 0 to 14pH - where 0pH is acidic and 14pH is alkaline.
In many industries, pH measurement is critical to the correct performance of processes. pH is temperature dependent thus the temperature of the sample under test will affect the pH value recorded.
The Elcometer 138/2 Surface Contamination Kit provides the means for testing invisible surface contaminants.
Measuring the level of contaminants on a surface prior to application of the coating is essential to ensure the quality of the coating and that its optimum lifetime achieved.