CW-S80C powder
TYPE : CHILLED WATER/HOT WATER/CLOSED RECIRCULATING SYSTEMS – CORROSION INHIBITOR; ANTIFOULANT; MICROBIOCIDE
CW-S80-C is a unique and specialized mildly alkaline nitrite based corrosion inhibitor for closed water circuits. It is available in a liquid form (CW-L20-C) and in a solid form (CW-S80-C). It contains the corrosion inhibitor, an internal indicator, a biocide and a hardness management compound. In its neat form the indicator is used to confirm that the product is suitably alkaline and when controlled at the required levels the indicator will reveal whether the pH in the circuit is adequate. At the required control limits the pH will not increase so as to affect amphoteric metals such as aluminium and zinc compounds harshly.
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Properties Powder : Appearance White Powder
Odour : Minimal
Flash Pt. : Not Applicable
Auto Ignition: Not Applicable
20% liquid m/m properties:
SG @ 25oC : 1.13 – 1.17
pH @ 25oC : 9.0 – 10.50 neat
Appearance : Pale Pink Liquid
Please note that if higher pH is required in the closed circuit that 5-10% of sodium hydroxide (caustic) lye can be added to the 20% blend.
The reconstituted CW-S80-C is nominally dosed as the liquid at between 3000-4000 mg/l in the closed water system to maintain a residual as nitrite at between 300 – 400mg/l as well as an effective biocide residual. In chilled water circuits hardness salt precipitation is not highly problematic, however, in hot water circuits this may prove otherwise.
The initial dosage is the most critical. Thereafter water losses in chilled/cold closed water circuits is estimated to be between 8% to 12% per month; whereas, in closed hot water circuits the water losses average between 8% to 12% per week. Based on this and routine water analyses the CW-S80-C can be supplemented to the circuit as required.
Liquid CW-S80-C can be stored for up to 24 months from the date of manufacture, in its original, sealed packaging, at room temperature in a dry area. Bags of powder CW-S80-C where applicable, must be kept undercover and out of direct sunlight. This product can be safely stored in plastic type holding tanks designed to manage the specific gravity listed.
CW-S80-C must be protected from strong acids, freezing and excessive aeration. Protective clothing such as gloves and goggles should be worn when handling.