Practical and Helpful Tips: Coatings

Vacuum Metallizing to Enhance Quality

Coating, metallizing, thermal spraying, vacuum metallizing, vacuum deposition, and metalation are various process involved in metallization process. In the coating process, the surface of an object is covered with another substance with the aim of achieving adhesion, good appearance and reducing corrosion, wear and tear. Metalizing processes include treatment, coating as well as combining an object with a metal. In thermal metallization, heat is involved to melt a substance that is then sprayed on the surface of another object. A process, where organometallic compound which are metals having carbon atoms are reacted with organic compounds, is referred to as metalation. Placing very thin layers of a substance on an object in a vacuum is referred to as thermal deposition process. Vacuum metalizing is the process of coating an object with a metal where the process takes place in a vacuum chamber.

During the vacuum metalizing process, the metal to be used in the coating is heated in a vacuum chamber to its boiling point until it vaporizes. After vaporization, condensation follows and the metal particles settle on the surface of the object forming a metal coating. Heating and vaporization of the metal uses heat generated in various processes including resistance heating and electron beam. Electric currents are passed through the metal where they encounter resistance hence heating the metal in resistance heating. Electron beam uses cathode rays which emit negative cathodes in a vacuum tube producing heat. Prevention of wear and tear of the objects, decorating the object and increasing the uses of an object such as through promoting the conductivity of poor electrical conductor objects are some of the purposes of vacuum metallizing objects.

There are various benefits of vacuum metalizing. Vacuum metalizing always results into a uniform polish on the object with minimal effects on the health of the user. Some substances and metals used in the vacuum metallizing process are highly hazardous to human health hence users are protected from coming into contact with them. Vacuum metalizing helps in producing highly durable metals that are not likely to contact water as well as air which triggers rusting in metals. Reduced pollution is also an important benefit of vacuum metallization since the amount of carbon released into the atmosphere is reduced.

Measures to prevent any damage on the object should be adopted to ensure that the market value of the object is maintained. Some damages likely to be encountered on the objects during the vacuum metalizing process include the objects having burned parts which lack the shiny color, the coating may be too thin making the object have distinct colors like green appearing and the objects might also be showing rainbow colors. Quality can be maintained by ensuring that all those problems likely to be experienced are prevented.

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