A kind of environmental protection faucet and preparation method thereof

Abstract

The present invention relates to the fields of manufacturing and surface treatment, in particular to an environmentally friendly faucet without precipitation of heavy metals and its preparation method, including the following processing steps: step (1), casting a metal faucet by gravity, and obtaining a metal faucet with a high-gloss surface by physical polishing Step (2), carrying out physical vapor deposition of nitride, so that the outer surface of the metal faucet forms a nitride protective film; step (3), carrying out chemical vapor deposition of parylene or parylene halides, so that the metal faucet An organic film is formed on the inner and outer surfaces. The metal faucet is cast by gravity, the high-gloss surface is obtained by physical polishing, physical vapor deposition is carried out, and then chemical vapor deposition is carried out. Using the good permeability of chemical vapor deposition, an organic film is deposited on the inner and outer surfaces of the faucet. This layer of organic film It plays the role of isolation and shielding, so that water and metal do not contact, thereby obtaining a metal faucet without precipitation of heavy metals. The preparation method of the invention is simple and the production cost is low.

Description

technical field [0001] The invention relates to the fields of manufacturing and surface treatment, in particular to an environment-friendly faucet without heavy metal precipitation and a preparation method thereof. Background technique [0002] The material of the existing metal faucet is mainly copper, which is generally formed by gravity casting, and then the finished product is prepared by a water electroplating process. The metal faucet produced in this way, its metal surface is in direct contact with water, and heavy metals in the faucet material and electroplating layer, such as lead, chromium and nickel, will slowly precipitate into the water, polluting the water quality, and the precipitation of heavy metals will cause serious harm to the human body. Environmental leaders have always been a research hotspot in the industry. [0003] Chinese patent application number is 200610005689.2 invention patent, discloses a kind of lead-free copper alloy, and its copper alloy ...

AI Technical Summary

Problems solved by technology

However, the disadvantages of producing faucets with this copper alloy material are: on the one hand, it is difficult to refine the lead-free copper, and the cost is high, resulting in a substantial increase in product cost; Oxidation, green copper oxide is easy to form on the surface of the faucet, affecting water quality

In the prior art, there is also a chemical lead washing process to wash off the lead on the surface of the faucet, but this can only wash off the lead on the surface of the faucet. This method only temporarily relieves the heavy metals from exceeding the standard, and the lead in the inner layer will remain as time goes by. It will precipitate to the surface, and lead washing is a kind of high-concentration acidification, polluting the environment