Wear Resistance of Spark Ignition Engine Piston Rings in Hydrogen-Containing Environments

We describe the external and internal hydrogen interaction on contacting surfaces in “cylinder–piston rings” friction coupling. Under influence of high temperatures pressure, oil combustion chamber at a temperature up to 1473 K decomposes forms small amounts water. External (H2) is subsequently formed. Hydrogen removal from piston rings reduces heterogeneity structure, residual stresses, uneven physical chemical properties near-surface layers, which stress concentration and, as consequence, results an improvement performance characteristics surface layers couple “cylinder-piston spark ignition engine.