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D.C.W.T. Non Chromate

DIESEL COOLING WATER TREATMENT NON-CHROMATE is a concentrated, low toxicity, liquid product used as a corrosion inhibitor and scale controller for the treatment of cooling water in all diesel engines, as well as for any other cooling and heating water system, contaminated with deposits and corrosion which require chemical cleaning.

Characteristics, Advantages & Applications

  • Prevents corrosion and scale formation.
  • A Chromate-free product.
  • It is not an oil compound and does not create foaming.
  • Protects various metal surfaces and is compatible with non-metals.
  • Has a low degree of toxicity.
  • Prevents scale overheating and maintains regular heat transfer.
  • Has no effect on rubber and plastic compounds, hoses.
  • Compatible with glycol-based antifreeze and sealing products.
  • Cost effective, easy to handle and apply.

Physical Properties

D.C.W.T.-N.C. is a Non-Chromate Nitrite liquid compound with a deposit modifier, pH stabilized.

Appearance / Color Clear, light yellow liquid
Specific gravity 1.07/15°C
pH 8.5-10
Odor Odorless
Order No Size (in litres) Container
673004 30 Plastic jerrican

Application and use

Dosing Procedure

Initially, a volume proportion of 15 litres of D.C.W.T.-N.C. per ton of distilled or fresh water must be used.  However, appropriate dosing can and must be determined, after the testing of water samples, using the MARICHEM NITRITE TEST KIT. For optimum results, a nitrite concentration of 20 to 60 ppm in the cooling system is recommended.

Feeding Procedure

After the volume of D.C.W.T. - N.C. is determined, feed the solution into the expansion tank or through a metering pump, these are responsible for the circulation of the solution into the cooling water system. Moreover, the engineer has to make sure that a proper distribution of the solution is accomplished and that a protective film is created. Only then is the treatment complete. After the application and while the cooling water system is in operation, let the solution circulate for approximately 2 hours. Then, test the Nitrite concentration in the water using the MARICHEM NITRITE TEST KIT. Repeat the testing procedure and make up with D.C.W.T. - N.C. solution in order to stabilize the Nitrite concentration in the water due to losses/leakage of the system.

Approvals and Certifications

D.C.W.T. NON CHROMATE is approved by the following Engine manufacturers:



HANDLING Handle with care. Store in a dry, cool and well ventilated environment.
Eye Contact Avoid Eye contact. Otherwise, flush with plenty of water for a few minutes. Seek medical attention.
Skin Contact Avoid Skin contact. Otherwise, wash contaminated area thoroughly with water. Seek medical attention.
Inhalation Avoid inhalation of vapors. Otherwise, seek fresh air source at once. Seek medical attention.
If Swallowed Avoid ingestion. Otherwise, consume a considerable quantity of water. Do not induce vomiting. Seek medical attention.
GENERAL INSTRUCTIONS Avoid spillage, splashing and mishandling. Precautionary measures for body protection are strongly recommended before use.

Read the Material Safety Data Sheet before using this product.

For detailed information on safety and health, please refer to Material Safety Data Sheet and/or Product Label.