Cortec M-640 Liquid Additive
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Product Description
M-640 L is a liquid corrosion inhibiting additive for water and glycol-based heat exchange fluids. It protects ferrous and non-ferrous metals from corrosive contaminants. This product is an excellent replacement for silicates and phosphate/nitritebased/amine compounds. M-640 L is based on an organic-inorganic formulation designed for low level concentrations in field applications. M-640 L contains a unique combination of contact and vapor phase corrosion inhibitors that provide corrosion protection even in partially filled spaces.
Features
- Protects ferrous and non-ferrous metals from corrosion and pitting
- Nitrite, chromate, silicate, and heavy metal free
- Contains contact and vapor phase corrosion inhibitors
- Economical
- Use in low dosages
- Environmentally acceptable
Physical Properties
| Appearance | Clear yellow liquid |
| pH | 8.8-9.3 (1% solution) |
| Non-volatile Content | 57-67% |
| Solubility in Water | 100% |
| Density | 9.2-9.3 lb/gal(1.10-1.11 kg/l) |
Typical Application
M-640 L is an additive to antifreeze/coolant fluids to replace nitrites, phosphates, amines, and other types of restricted corrosion inhibitors.
The final concentration range for M-640 L under operating conditions is 2.0-2.5% by weight.
Packaging and Storage
M-640 L is packaged in 5 gallon (19 liter) plastic pails, 55 gallon (208 liter) steel drums, liquid totes, and bulk. It should be stored in a tightly closed container. The shelf life is 24 months.