| 简介 |
A chemical process for treating surface of a piston to reduce its surface friction includes immersing piston in machine oil, heating to 220-250°C, adding alkali-metal carbonate, alkali-metal nitrite, alkali-metal chloride, and Ce-containing rare-earth metal powder, maintaining said temperature for 10-24 hours, cooling to below 50°C and taking out the piston. The invention can be used to improve the pistons and the cylinders for various engines and air compressors. It can obviously improve the work efficiency of the piston and the cylinder and prolong the operational life of the whole cylinder. It can not only save fuel but also reduce exhaust pollution from vehicles and air compressors, which results in good prospect in industry. |
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