Non-ferrous metal deactivator


  • Metalworking fluids
  • Hydraulic fluids
  • Gear oils
  • Turbine oils
  • Compressor oils
  • Greases
  • Slideway oils

Additin RC 8221 is recommended to be used to protect copper or copper alloys against corrosion. A very thin and stable film is formed on the metal surface by chemisorption which protects the metal without staining of the heat transfer. The negative influence of dissolved copper ions on the oxidation stability of lubricants and rubber parts is minimized. This can be seen by strong synergistic effect in combination with antioxidants. Corrosion, especially pitting on metals like aluminum, zinc and ferrous metals by forming copper deposits on the metal surface is avoided.


The solubility in the base oils used and the compatibility with other additives should be verified.

Storage conditions

In a dry place at room temperature approx. 12 months


This product is harmful, symbol Xn. Consult material safety data sheet (MSDS) for additional handling information on Additin RC 8221.

For more information, please contact us or email uk.sales@krahn.eu

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