Chemical Conversion Coatings
Chemical Conversion coatings, also called Chromate Conversion coatings, are thin protective layers of chromium oxide and other chemical compounds. They can be used to treat aluminum, zinc, cadmium, copper, silver, magnesium and their alloys. Although there are several kinds of these conversion coatings, the most common is a chromate fluoride bath. Because the process uses toxic chromium compounds, which may include hexavalent chromium, the industry is working to develop less toxic alternatives. These alternatives will comply with the increasing legislation prohibiting use of toxic materials such as the RoHS Directive by Europe.
The most common use for Chemical Conversion coatings is to increase corrosion resistance of the treated metal. Conversion coatings are also used as a primer, which helps to improve bonding to subsequent coatings such as paint and adhesives. Chromated parts also retain electrical conductivity to varying degrees and can be used in electronics. The process is also used for color coding for identification and for decorative purposes.
Ampere Metal Finishing Facilities
Ampere Metal can match a range of colours in our chemical film process from clear to yellow to tan. Our facilities allow us to process parts with a wide range of sizes from small to large.
Specifications for Chemical Conversion Coatings
Ampere Metal Finishing certifies our Conversion Coatings to a variety specifications. The following lists some of the more common specifications for Chemical Conversion Coatings. If the particular specification you require is not listed, please contact us for further information.
For a complete list of all the specifications available click here.
Specifications for Chemical Conversion Coatings
- MIL-C-5541, Class 1A
- MIL-C-5541, Class 3
