Nalco® wt-222 - Aquatech-vandbehandling.dk

PRODUCT NAME
NALCO® WT-222
Corrosion Inhibitor
PRODUCT DESCRIPTION AND APPLICATION
Nalco WT-222 is a multifunctional, one-drum, scale and corrosion inhibitor for industrial open recirculating
cooling water systems.
This product was designed for systems with corrosive water and low to medium hardness and/or alkalinity.
Nalco WT-222 will provide protection over a wide range of operating conditions.
Nalco WT-222 can provide the following benefits in customer systems:
Management of cooling system operation based on the operational stresses placed upon it.
Extended tube bundle and equipment life due to reduced corrosion and scale
Reduced energy costs due to cleaner heat transfer surfaces
PHYSICAL & CHEMICAL PROPERTIES
These properties are typical. Refer to the Material Safety Data Sheet (MSDS),
SECTION 9, for the most current data.
Form Liquid
Color Light Yellow
Odor None
Specific Gravity @ 77°F (25°C) 1.12
Density 1.12 kg/l [ 9.3 lb/gal ]
pH (100%) 0.4
Viscosity @ 68°F (20°C) 6 cp
Freezing Point 11°F [-12°C]
Freeze-Thaw Recovery Complete
Boiling Point 212°F [100°C]
Solubility in Water Complete
VOC Content Not Available
Product Viscosity vs. Temperature
Viscosity (cp) Temperature
10 -3°C (26.6°F)
7 9°C (48.2°F)
6 24°C (75.2°F)
REGULATORY APPROVALS
Nalco WT-222 is intended for industrial use only. It must not be fed to potable water systems.
Refer to the Material Safety Data Sheet (MSDS), SECTION 15 for the most recent information on approvals.
09-07-09/JLM ; NALCO WT-222 CPP-DPL 1

MATERIALS OF COMPATIBILITY
Compatible Not Compatible
Buna-N Aluminum
Plasite 4005 Brass
Plasite 6000 Carbon Steel
Plasite 7122 Nickel
Hypalon Stainless Steel 304
Neoprene Stainless Steel 316
Polyethylene
Polypropylene
PVC
Teflon
Polyurethane
Vinyl
Viton
DOSAGE AND FEEDING
For complete dosage and feeding recommendations, consult your Nalco Sales Engineer.
DOSAGE REQUIREMENTS
START-UP
Initially, feed Nalco WT-222 at the target dosage plus 25% based upon system volume. If the system volume
is unknown or uncertain, perform Diagnostic TRASAR® to determine. See Figure 1 "Nalco WT-222 control
chart " to determine the appropriate dosage of Nalco WT-222 and see CPP Presection under A-Z -LITE
section for further details regarding proper program control limits. Also, remember that the pH should never
rise above 8.5.
09-07-09/JLM ; NALCO WT-222 CPP-DPL 2

M-alkalinity M-alkalinity (ppm (ppm CaCo3) CaCo3)
350
300
200
100
0
Figure 1. Nalco WT-222 Control Chart
CHART TRASAR 23222
100 ppm
125 ppm
100 200 300 400 500 600 700 800
Ca-Hardness (ppm CaCo3)
PRODUCT FEEDING AND PROGRAM COMPATIBILITY
150 ppm
Nalco WT-222 should be fed via a closed feed system. A closed feed system is defined as a system in which
fluid is moved from a closed storage vessel into a treated media without exposure to the atmosphere except
through normal venting or pressure relief devices.
Nalco WT-222 should be fed continuously to assure that adequate zinc residuals are maintained at all times.
Slug feed can cause localized chemical concentrations, and undesirable reactions such as precipitation of
zinc in the bulk water and potential reactions with other chemicals in the cooling water. Low product levels
will result in excessive corrosion.
Nalco WT-222 should be applied to a point in the system where rapid mixing and adequate distribution will
occur. The suction side of the circulating water pump is recommended.
This product contains anionic materials. Do not feed cationic containing materials with this program.
Periodic testing for zinc or phosphate may be useful. The soluble zinc level (0.45 micron filter) should be at
least 0.3 ppm. The difference between the filtered and unfiltered orthophosphate should be < 2 ppm.
Monitoring the water chemistry will help determine how well the chemical treatment program is working. The
following tests should be conducted on a routine basis to ensure that the water chemistry is kept in an
appropriate range.
09-07-09/JLM ; NALCO WT-222 CPP-DPL 3

Parameters Range Method or Kit
pH 7.3-8.5 pH meter
Conductivity