Two-way protecting pumping rod connected hoop

A bidirectional protection rod coupling, belonging to the oil field equipment. Coupling surface thermal spray process with a coating thickness of 0.26-0.6mm. The coating composition is 0.3-0.6% carbon, 3.5-4% silicon, 3.5-4% boron, 15-16% chromium, 3-3.5% copper, 3-3.5% Mo, 3-5% Fe, Ni 63.9- 68.7%. Good wear corrosion resistance, dense coating, which is good self-lubricating properties, minimal coefficient of friction.