Perfusion type electronickelling and silicon carbide device for air cylinder

Abstract

The invention discloses a perfusion type electronickelling and silicon carbide device for an air cylinder. The perfusion type electronickelling and silicon carbide device for the air cylinder comprises an electroplating base, an electroplating solution groove, a cathode conducting rod and an anode conducting rod. The air cylinder to be electroplated is placed inversely on the electroplating base which is internally provided with a groove. One end of the anode conducting rod is arranged in the groove, while the other end of the anode conducting rod extends into a chamber of the air cylinder to be electroplated. The cathode conducting rod is arranged above the electroplating base and can move up and down. The electroplating base is provided with a liquid inlet which is communicated with the electroplating solution groove through a flow divider. The flow divider comprises an electroplating solution inlet, an electroplating solution outlet and at least a return opening. The electroplating solution outlet is communicated with a liquid outlet. The electroplating solution inlet and the return opening are communicated with the electroplating solution groove. The perfusion type electronickelling and silicon carbide device for the air cylinder further comprises a drive device which drives the electroplating solution to flow upward along the inner wall of the air cylinder and flow from the top of the air cylinder back to the electroplating solution groove. According to the device, the electroplating solution is less polluted, the life cycle of the electroplating solution is long, the electroplating solutions in grooves are not needed to be prepared, and the regenerating time and cost of the electroplating solution are reduced.

Description

technical field [0001] The invention relates to an electroplating device, in particular to a perfusion electroplating nickel and silicon carbide device for electroplating the inner wall of an engine cylinder. Background technique [0002] Because the engine block moves under high-speed and high-temperature conditions, the inner wall needs to have a certain hardness, and at the same time have wear resistance and anti-friction performance. In the engine field, the method of plating metal chromium (Cr) on the inner wall of the cylinder is generally chosen to meet the requirements of the engine. Requirements, with the continuous development of economic construction, people's living standards improve, people's understanding of the environment is increasingly profound, industrial products are also accelerating reform and updating with social progress, and the use of hexavalent chromium in the cylinder electroplating process is more and more harmful to the environment. It has attra...

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Problems solved by technology

[0004] At present, the nickel-silicon carbide plating process used by many construction machinery enterprises in the world basically follows the traditional immersion electroplating method, which is to immerse the cylinder in the electroplating solution and conduct electroplating. There are some problems in this method: 1. No need The electroplated surface (the surface area is about 10 times the area to be plated) has been immersed in the electroplating solution during the electroplating process, and the surface metal ions, such as zinc, nickel, and aluminum, will dissolve into the electroplating solution and pollute the electroplating solution, making the electroplating solution useless. The service life is shortened, the content of metal ions in the wastewater is increased, and the cost of wastewater treatment is increased; 2. During the electroplating process, the distribution of silicon carbide particles in the electroplating solution in the cylinder cavity is unstable, and there is a crisis of uneven dispersion of silicon carbide in the coating, which affects the operation of the engine; 3. As the concentration polarization of the solution in the cylinder cavity increases, the current efficiency decreases; 4. The water consumption for cleaning after electroplating is large, wasting water resources

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