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Ring Side Armouring
Chromium Plating

The life of internal combustion engines is limited not only by wear of the cylinder and piston ring running face but also to some extent by wear of the ring sides and piston groove.
A means of remedying the problem of side wear besides armouring the piston grooves is to chromium plate the ring sides.
See Fig. 29.
Depending on the application and required durability chromium coating thicknesses on the ring sides of min 5 µm for high speed gasoline engines and min. 10 µm for diesel engines are recommended

Fig. 29: Piston Ringwith Chromed Running Face and Sides


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