A method for removing wax before electroplating steel parts for pumps

Abstract

The invention discloses a method for removing wax before electroplating steel parts for a pump. The method comprises the following operation steps that 3-5 steel parts are connected in parallel and then are placed in a phosphorus-free cleaning fluid as cathodes, a direct current is conducted, and the wax is removed through electrolysis. According to the method for removing the wax through the electrolysis, the wax removing efficiency is high, and the wax removing speed is high; the cleaning liquid does not contain phosphorus, so that no pollution is caused to the environment; the cleaning liquid is stable, and almost no foam is generated during electrolysis, so that the danger that explosion is caused due to the fact that the foam encounters electric sparks is avoided; and moreover, the cleaning fluid can be recycled, so that the production cost is reduced, and the environmental protection is facilitated.

Description

technical field [0001] The invention belongs to the field of pump manufacturing, and in particular relates to a method for removing wax before electroplating of steel parts for pumps. Background technique [0002] In the field of pump processing and manufacturing, the most widely used material is iron and steel materials. Before use, iron and steel materials need to be polished with polishing wax. Different polishing waxes are applied to the polishing of different substrates due to their different metal abrasives. Among them, the main abrasive of white wax is fine powder of calcium oxide, which is suitable for polishing soft metals such as nickel, aluminum, copper and their alloys; the main abrasive of red wax is fine powder of iron oxide and feldspar powder with medium hardness, which is suitable for polishing steel Polishing of products; while the main abrasive of green wax paste is chromium oxide green fine powder, which is suitable for polishing hard metals such as chrom...

AI Technical Summary

Problems solved by technology

At present, the commonly used dewaxing methods include organic solvent dewaxing, chemical dewaxing, and electrochemical dewaxing. Among them, the organic solvent dewaxing speed is fast and has no corrosion on metals, but the cleaning is not thorough, and the solvent residue on the workpiece needs chemical treatment. ; The cost of organic solvent cleaning is more expensive than chemical cleaning, and the equipment requirements are high; organic solvents are flammable and difficult to manage; organic solvents are highly volatile and have obvious inhalation or contact damage to the human body, especially for long-term operation. Larger, it is a process that has already faced elimination

Chemical wax removal In order to improve the effect of wax removal, a large amount of phosphorus-containing substances will be used, and the number of chemical reagents used is effective. In continuous production, the cost is high and it will cause a lot of harm to the environment.

Electrochemical wax removal is green and environmentally friendly, the cleaning solution can be used continuously, the cost is low, and it is suitable for large-scale continuous production, but ordinary electrochemical wax removal methods are easy to corrode non-ferrous metals, and cathode electrochemistry is prone to hydrogen embrittlement. Anode electrochemistry is easy to oxidize the metal surface. At the same time, electrochemistry will produce a large amount of foam, which may explode when encountering electric sparks. Therefore, a safe electrochemical wax removal method with little damage to steel parts is urgently needed

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