What is Diffox?
When good sliding wear resistance in conjunction with excellent corrosion resistance is required, Diffox is the answer. Diffox forms a complex case of diffusion nitrides and oxides on low and medium alloy steels that offer a superior mix of properties. It is a surface conversion rather than a coating and therefore it is integral with the material surface. Conventional nitriding does not allow the diffusion depth and white layer to be optimized, however our Diffox coating does excatly that. It provides an optimal surface for the specific application, plus the added benefit of the surface sealing oxide that enhances the corrosion resistance.Typically a Diffox part will show red corrosion only after +- 400 hrs in salt spray testing.
Since Diffox is a diffusion process there is no danger of delamination as found with coatings and this is a major advantage vs chrome or nickel plating
- High resistance to seizing and scuffing
- High resistance to corrosion
- High resistance to fatigue
- High resistance to wear
- Insignificant or minimal distortion/size change
- Good retention of lubrication
Properties of Diffox
Due to Diffox being a modification of the steel surface, properties such as wear resistance and corrosion resistance of Diffox change with different base materials.
The oxide top layer is generally between 10 to 20 microns in thickness with hardness’s of between 800 and 1500Hv. Furthermore, due to special pre-, intermediate and post finishing procedures the smoothness of the layer shows added sliding wear resistance.
What can it be applied to?
Diffox is suitable for a wide variety of carbon steels, low alloy steels and even cast irons. Because it is a relatively low-temperature process, part distortion is reduced provided the initial heat treatment has been done correctly. Please enquire with us about the correct heat treatment for the part before treatment. Correct heat treatment will avoid unexpected size changes and hardness changes in the base metal.
- Shafts and pins
- Actuator rods and hydraulic shafts
- Rock drill components
- Gears and Cams
- Valves, crankshafts, tappets, stops
- Wear plates and sliding mechanisms
Contact us for further information