PVD is a method of depositing thin films by the condensation of a vaporized form of the desired film material (titanium, chromium or aluminum) onto various workpiece surfaces.
The advantage of the PVD process are multiple:
Much better adherence
More robust and durable surface
Cost level matches traditional technologies
More about the restriction of hexavalent chromium
RoHS (Restriction of Hazardous Substances) is referred erroneously as the “lead-free-directive”. The directive concerns six types of materials, including hexavalent chromium (Cr&+). Hexavalent chromium is typically used for decoration purposes and anti-corrosion purposes. The restriction of using hexavalent chromium for surface treatments with decorative purposes, according to Annex XIV, will take effect on 21st September 2017. This concerns all surface treatment units in Europe and everybody who is exporting goods with hexavalent chromium to EU.
What is PVD?
PVD is an abbreviation of the English term: “Physical Vapor Deposition”. PVD is a method of depositing thin films by the condensation of a vaporized form of the desired film material (titanium, chromium or aluminum) onto various workpiece surfaces with sputtering, which is a bombardment with ions or evaporated by heat. PVD-coating is covering objects with a thin film with a thickness of 3-8 µm.
The huge advantage of PVD is the environmental friendly technology, a much better adherence and it even makes the surface robust and durable. Earlier, this process has been more costly than traditional processes, but as the technology is used in the motor vehicle industry to cover aloy wheels and as well in the watch production industry prices fall accordingly.
The replacement of black hexavalent chromium with black PVD covering
In EA-Connect has in cooperation with a customer investigated a replacement and the results have been so remarkable, as the decorative expression is identical compared to previous products being treated traditionally.