Electroplating amorphous ferrum-nickel-tungsten alloy corrosion-resistant wear-resistant oil pump

Abstract

The invention relates to an electroplating amorphous ferrum-nickel-tungsten alloy corrosion-resistant wear-resistant oil pump comprising a pump barrel, a plunger piston, an oil inlet valve and an oiloutlet valve, wherein the internal surface of the pump barrel is plated with an amorphous ferrum-nickel-tungsten corrosion-resistant wear-resistant protective layer, and the thickness of the protective layer is at least 75 mu m. The method for plating the protective layer comprises the following steps: electrolyzing to remove oil, washing with clear water, etching, washing with deionized water, electroplating, washing with weater and heat-treating. The electrolyzing to remove oil is realized by treating in an oil removing solution at 65-75 DEG C for 5-10 minutes, and the current density is 5-10 A / dm<2>. The etching is realized by removing oxidation films in a NaNO3 solution with the current density of 5-10 A / dm<2> until the natural color of the metal is exposed. The electroplating is realized in such as way that: a tungsten alloy plating solution is adopted, sodium hydroxide or ammonia is used for regulating the pH value to 7-8, the temperature for the electroplating is at least 70 DEGC, the current density is 5-10 A / dm<2>, and the electroplating time is 3-4 hours. The heat treatment is realized by keeping the temperature at 500-600 DEG C for 1.5 hours. The oil pump has the advantages of high microhardness, acid resistance, corrosion resistance, favorable wear resistance and long service life.

Description

technical field [0001] The invention relates to the technical field of oil well pumps, in particular to an electroplated amorphous iron-nickel-tungsten alloy anti-corrosion and wear-resistant oil well pump. Background technique [0002] The oil pump is mainly composed of pump barrel, plunger, oil inlet valve and oil outlet valve. The oil pump is driven by the pumping unit during work, and the plunger reciprocates up and down in the pump barrel. During the upstroke, the oil outlet valve at the lower part of the plunger is closed, the plunger pushes the crude oil in the pump barrel out of the pump barrel, and at the same time the lower part forms a vacuum, and the oil is sucked into the pump barrel through the oil inlet valve. During the downstroke, the oil inlet valve is closed, and the oil is pressed to the top through the plunger and the oil outlet valve, so that the continuous up and down movement will continuously suck the oil to the ground. As most domestic oilfields h...

AI Technical Summary

Problems solved by technology

At present, the chromium plating method commonly used in China is resistant to acid, alkali and sulfide, not resistant to salt spray, and has good wear resistance, but hexavalent chromium causes serious environmental pollution.

Nickel-phosphorus plating is alkali-resistant, not acid-resistant, wear-resistant in general, and pollutes the environment

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