Description
Directions for use
GCM – AF 1207 is a highly effective corrosion inhibitor for the common ferrous and non-ferrous metals in cooling water systems. The stable oxide film that is formed prevents corrosion caused by electrolytic action between dissimilar metals used in the system. GCM – AF 1207 has been field tested and found to have no detrimental effects on non metallic substances such as seals, glands, packing, hoses, gaskets etc., normally used in these systems. The compound is alkaline and so will suppress acid corrosion, which would otherwise result in corrosion damage such as pitting. However, the alkalinity control is such that even if the product is accidentally overdosed, the pH of the water will remain within limits. The metals which would be affected by extremes of alkalinity or acidity are protected. In cases where systems are contaminated with oil and/or scale they should be cleaned before starting to apply GCM – AF 1207.
GCM – AF 1207 is not suitable for use in cooling systems containing aluminium components.
Benefits
Approved by major diesel engine manufacturers
Simple control test
Dosing method
GCM – AF 1207 should be dosed to a suitable point in the system. If the expansion tank is used then adequate circulation must be assured.
Initial dosage for an untreated system is 9 litres of GCM – AF 1207 /1000 litres of untreated distilled/technical water. This will bring the treatment up to the minimum level of 1000 ppm nitrite. The dosage chart given below is for convenience in calculating the amount of GCM – AF 1207 required to bring the treatment level to the suitable point between the minimum and maximum – this being 1440 ppm nitrite.
Features
Liquid product, easy to use
By forming an oxide film on the metal surfaces electrolytic corrosion is prevented
Effective against cavitation and erosion
Compatible with hoses, gaskets and seals
Compatible with glycols for frost protection
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