What is the technology of stainless steel color plate - vacuum color plating

In the stainless steel trim industry, stainless steel surfaces come in many colors, from black to fuchsia. What makes stainless steel so colorful? The answer is vacuum coating technology;

Vacuum evaporation is heating metal under high vacuum to make it melt and evaporate, and then form on the plastic surface after cooling method of metal thin films. Commonly used metals are low melting point metals such as aluminum.

Methods of heating metals include the use of electrical resistance to generate thermal energy and the use of electron beams.

The evaporation time must be adjusted to ensure that the heat released by the metal during cooling does not deform the resin. Also, metals or alloys with high melting and boiling points are not suitable for evaporation.

Place the metal to be plated and the plastic product to be plated in a vacuum chamber, heat the material to be plated by a certain method to evaporate or sublime the metal, and the metal vapor condenses into a metal film on the surface of the cold plastic product.

Under vacuum conditions, chemical reactions between substances and other molecules can be reduced, providing the density, purity, deposition rate and adhesion of thin films. In general, vacuum evaporation requires the pressure of the film formation chamber to be equal to or lower than 10-2Pa. For the occasions where the evaporation source, the product to be plated and the quality of the paint film are required to be high, the pressure is required to be low (10-5pa), the thickness of the coating is 0.04-0.1um, too thin, and the reflectivity is low; fall off. When the thickness is 0.04, the reflectivity is 90%. Stainless steel vacuum coating adopts titanium target, and forms various colors by controlling the thickness of titanium layer.

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