... oil-well sucker-rod pump, save on the surface layer of a high-corrosion properties. The paper presents a methodof improving the corrosion resistance of the working surface of the cylinders of oil-wellsucker-rod pump by ion-nitriding vacuum to form a nitride zone. Materials and methods Vacuum ion nitriding, the depth distributionof the microhardness of the nitrided layer, the phase composition of the nitrided layer, X-ray structural analysis of the nitrided layer. Results The article gives an idea ...

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