How corrosive wear attacks piston rings?

asked 07 Sep '17, 10:45

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Corrosive wear on piston rings and cylinder liners is caused by a chemical attack on the metallic surface caused by sulphuric acid formed through a chemical reaction in the combustion chamber. Alkaline lubricating oils make it possible to keep the corrosive wear within tolerable limits, despite the use of heavy fuel oil.
Observations of corrosive attacks on piston ring running surfaces are very rare, as there is a continuous abrasive polish, which is normally more severe than the corrosion. However, corrosion can be visible on cylinder liner walls and piston ring sides. In this case, engine manufacturers' recommendations relating to cylinder oil consumption and quality should be checked.

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answered 07 Sep '17, 10:48

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