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HEAT TREATMENT c.c.
  Specialists in Heat Treatment

  NITREG® - POTENTIAL CONTROLLED NITRIDING 
 Technical Information

Corr-Check®: Corrosion Protective Treatment

Ferrous alloys suffer from corrosion to some extent. Surface treatments will weaken or enhance the corrosion resistance of the treated surface, as an intentional design objective or a side effect. Nitriding or Nitrocarburizing are of particular interest because in most cases such surface treatments will be the last manufacturing operation. The nitrided/nitrocarburized component as a finished product may require additional protection. 

Corr-Check® has been developed with that end in mind. It is a light, non-oil based corrosion inhibitor, applied to enhance the corrosion resistance of the surface, both in service as well as simply to increase the component’s shelf life.  

Corrosion resistance of non-stainless alloys is enhanced somewhat by nitriding or nitrocarburizing due to the compound layer created on the surface. However, the improvement is relatively small and a Corr-Check® treatment is frequently added as an inexpensive means of improving the component’s resistance to corrosion by an order of magnitude. In as much as a nitrided surface may show rust spots in a corrosion test even before 24 hours, Corr-Check® will in most cases move that point to well over 96 hours, a traditional cut-off limit for many applications. If additional corrosion resistance is required, the ONC® process should be considered.  

The treatment is equally applicable to stainless steels, which tend to lose some of their inherent corrosion resistance in a nitriding process.  

Summary of Advantages:

      •  Easy and safe treatment,

      •  Non-sticky surface when the surface has dried off,

      •  Significant enhancement of corrosion resistance