Mobile test systems for assessing effectiveness
Test system for determining and assessing the effectiveness of inhibitors using the Coupon Test (ASTM D 2688)
METAKORIN has developed a mobile test system for checking suitable inhibitors. The effect of the inhibitor can be compared simply and quickly with untreated water. The design of the test largely corresponds to the one described in ASTM D 2688 "Standard methods of testing corrosivity in the absence of heat transfer (weight loss methods)." The system requires no maintenance and can be set up anywhere, provided water and wastewater connections are available. At the end of the test, the provider receives a meaningful assessment with graphic documentation.
Measurement method:
Prepared, weighed test strips (coupons) made of the test material are placed in drinking water for a given period of time under defined conditions. The coupons are removed at intervals of 1-3 weeks, examined visually, cleaned and weighed. The rate of corrosion can be calculated in mm/a from the loss in weight.
METAKORIN compact test system for inhibitor optimization
Inhibitors based on silicate and phosphate are used in many distribution networks to ensure that consumers receive good quality water. The ready-to-connect mobile compact test system was developed for water utilities that are looking into the use of inhibitors in drinking water or wish to optimize existing inhibition measures. The aim of these tests is to determine the optimal inhibitor and/or the minimum amount of inhibitor that is needed. The system can be provided with 2 to 5 test sections. The test sections can be inhibited with orthophosphate and/or freely selectable mixtures of silicate and orthophosphate, silicate and orthopolyphosphate, orthopolyphosphate and carbonate-activated silicate (integration method).
Such a test enables targeted tests to be carried out to determine which inhibitor or which combination of active substances is most suitable for the given water quality. Reduction of the amounts of chemicals added is now mandatory for reducing operating costs.
To ensure that the utility’s test costs are as low as possible, the mobile compact test systems can be hired for the duration of the agreed trial.