Cold spraying copper-containing stainless steel coating with antibacterial and antiviral functions

Abstract

The invention aims to provide the cold spraying copper-containing stainless steel coating with antibacterial and antiviral functions and the preparation process thereof, so that door handles, handrails or handrails and other public facilities in a public environment can generate an effective inhibition effect on high-concentration bacteria and viruses in the environment within 2 hours, and the antibacterial rate reaches 99.9% within 4 hours; the virus inhibition rate reaches 90% or above. The copper-containing stainless steel coating is prepared by mixing 304L stainless steel and pure Cu powder, and the cold spraying coating with long-acting antibacterial and antiviral functions is obtained by controlling the powder mixing speed and time, the carrier gas temperature of cold spraying, the spraying distance, the spraying pressure and the powder feeding temperature. The cold spraying preparation process is simple and feasible, and is suitable for large-scale popularization of a production line. While the corrosion resistance of the base material is greatly improved, the adhesion and reproduction of bacteria and viruses in a living environment can be fundamentally inhibited, and a propagation chain of microorganisms in a public area is radically cut off.

Description

technical field [0001] The invention belongs to the technical field of cold-sprayed coatings and preparation methods thereof, and in particular relates to a cold-sprayed copper (Cu) stainless steel coating with antibacterial and antiviral functions and a preparation method thereof. Background technique [0002] In modern architecture and decoration, door handles or handrails are mostly made of zinc alloy and aluminum alloy. The advantages of these materials are elegant appearance, firmness and durability. However, after long-term use of traditional door handles, a variety of microorganisms (including bacteria and viruses) will remain on the surface. Even after simple wiping, some bacteria and viruses cannot be removed, which will lead to cross-infection of subsequent users question. Through the contact between the surface and the hand, and the contact between the hand and the mucous membrane tissue of the body, a complete route for the transmission of bacteria and viruses i...

AI Technical Summary

Problems solved by technology

However, while providing antibacterial and antiviral functions, pure Cu cold spray coatings cannot improve the corrosion resistance of traditional door handles and ensure the aesthetics of metallic silver luster

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