Surface passivating device and method for metal casting

Abstract

The invention relates to the technical field of passivating devices, and discloses a surface passivating device for a metal casting. The surface passivating device comprises a passivating tank; a support plate is fixedly mounted at the left side of the passivating tank; a filter box is fixedly mounted above the support plate and at the left side of the passivating tank; a sieve plate is fixedly mounted inside the filter box; a water pump is fixedly mounted on the top of the support plate; a water inlet of the water pump communicates with a water pumping tube, one end of which penetrates through and extends into the passivating tank; and the water outlet of the water pump communicates with a water injecting tube, one end of which communicates with the filter box. According to the surface passivating device and method for the metal casting disclosed by the invention, the water pump, the water pumping tube, the water injecting tube and the water feeding tube are arranged, and the water pump is started for pumping and feeding a passivating agent in the passivating tank into the filter box through the water pumping tube; the sieve plate blocks impurities in the passivating agent, and the clean passivating agent is fed into the passivating tank, so that a great deal of metal chippings are prevented from being generated in the passivating tank, and the metal casting is not scratched during passivation.

Description

technical field [0001] The invention relates to the technical field of passivation devices, in particular to a metal casting surface passivation device and a method thereof. Background technique [0002] Passivation refers to the process in which metal is oxidized by strong oxidant or electrochemical method to make the surface inactive, that is, passivation. , a kind of active metal or alloy, in which the chemical activity is greatly reduced, and the phenomenon of becoming a noble metal state is also called passivation. [0003] The surface passivation of metal castings is soaking in a strong oxidant to convert the metal surface into a state that is not easy to be oxidized. The traditional metal casting surface passivation device has a relatively simple structure. When in use, debris and dust on the surface of metal castings enter the strong oxidant A metal casting that affects the quality of the strong oxidant and is easy to scratch and subsequently soaks, so a metal casti...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a metal casting surface passivation device and its method, which has the advantages of being able to clean up the metal debris in the strong oxidant in time, and solves the problem that the structure of the traditional metal casting surface passivation device is relatively simple. , the debris and dust on the surface of the metal castings enter the strong oxidant during use, affecting the quality of the strong oxidant and easy to scratch the problem of subsequent entry into the soaked metal castings

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