Description
ADICO-NC-L is a liquid, nitrite/borate based compound for scale and corrosion control in closed recirculating cooling systems.
Applications
Corrosion inhibiting treatment for closed recirculating systems such as:
Diesel Engine cooling water systems
Compressor cooling water systems
Centralized cooling system
Central heating systems etc.
Chilled water systems
Transformer cooling systems
Features and Benefits
Deposits on metal surfaces and electrolytic corrosion is prevented, cooling system component life is prolonged, maintenance and repair needs are reduced.
Effective against cavitational corrosion (corrosion induced by high frequency vibration).
As sludge is controlled and existing scale is gradually reduced cooling system cleanliness and efficiency are increased.
Constant pH levels are maintained even when over-dosed. Little risk to metals such as brass and copper from excessive pH levels exists.
Dose levels are independent from cooling water dissolved oxygen levels.
Harmless to non-metals, including hoses, gaskets, seals and compatible with permanent type anti-freeze.
Corrosion reduction: ADICO-NC-L is a nitrite-borate compound formulated to combat corrosion by controlling cooling water alkalinity and depositing a thin stable protective film over surfaces at risk. Laboratory tests have shown surface passivation by ADICO-NC-L to be able to reduce corrosion by more than 95% per year in comparison with untreated water.
The compound is alkaline and in solution, assures control of coolant water pH levels within close limits. Optimum alkalinity suppresses acid based corrosion which may lead to general damage and local pitting.
By ensuring that, even when grossly overdosed, the cooling water pH does not rise above critical levels. ADICO-NC-L provides protection for amphoteric metals, i.e. those which are liable to attack from extremes of acidity or alkalinity.
These metals, such as zinc, are frequently present in combination with brass, copper and iron and generally are present in cooling water systems and their components. Special inhibitors in ADICO-NC-L additionally protect these metals.
Their protection is important and can't be assured by the addition of simple alkaline water treatment chemicals.
Scaling Control: ADICO-NC-L combines and reacts with sludge, scale and rust deposits found in incorrectly treated cooling systems and will ensure their gradual removal without the risk that may be associated with acid cleaning.
Its use will clean and maintain cleanliness in all badly fouled systems.
In cases where systems are contaminated with oil and / or scale they should be cleaned before starting to apply ADICO-NC-L.
In these cases, degreasing should be performed with OIL-REMOVER-S and descaling with SCALE OFF - S.
Product Dose and Control
Initial dose for an untreated system to inhibit corrosion is 10 Lt of ADICO-NC-L for every ton of cooling water.
That gives approximately Nitrite concentration of about 1700 ppm.
Thereafter the dose rate of ADICO-NC-L is based on the nitrite concentration of the medium under treatment and is given in the table to return cooling water to the mid point value of the control limits. The mid point value is circled.
|
NITRITE ppm NO2
|
0
|
250
|
500
|
750
|
1000
|
1250
|
1500
|
2000
|
3000
|
4000
|
|
ADICO-NC-L LT/1000lt.
|
10
|
9
|
7
|
5
|
3
|
2
|
0
|
0
|
0
|
0
|
In cases of poor quality water, increased dosages may be necessary.
Buffering agents in ADICO-NC-L maintain pH values within suitable limits when the product is dosed as recommended.
Cooling water pH can also be checked and should be kept between 8,3-10.
| 
(SDS)