CORROSION INHIBITOR EYM is a water soluble environmentally friendly mixture of alkaline salts which provides premium corrosion protection on ferrous and non-ferrous metals. In the pH range of 7.5 to 9.5 CORROSION INHIBITOR EYM displays good rust inhibition for ferrous metals while exhibiting excellent compatibility with non-ferrous alloys. CORROSION INHIBITOR EYM is low foaming and stable in hard water. There is no direct correlation between the concentration of the CORROSION INHIBITOR EYM and the time to red rust, however, tests have shown that in an immersion process at a concentration of 20% v/v, ferrous metal (carbon steel) did not rust for 2 to 3 weeks in high summer humidity. These parts were stored indoors in a shipping area of the plant away from production. CORROSION INHIBITOR EYM is easily cleaned off with an alkaline cleaner and or water depending on the concentration at which it was applied. Your Dimachem Representative will recommend the appropriate cleaner to use.
CORROSION INHIBITOR EYM can be used in either immersion or spray applications. It can be used at ambient temperature, in immersion processes but in spray applications a temperature of 120°F. is recommended. CORROSION INHIBITOR EYM should be metered into the system at a rate to maintain a concentration of 1/2% to 20% by volume depending on the application and end use.
Using a 10 ml. pipette transfer 10 mls of bath solution into a clean, dry 250 ml. flask. Add 5 drops of INDICATOR #5 (Phenolphthalein) to the flask and titrate with TEST SOLUTION #4 (0.1N H2SO4) until pink colour changes to colourless. The number of mls of TEST SOLUTION #4 is recorded as Free Alkalinity.