The Prefil™ test has been in use for many years, and provides a rapid means to assess molten metal cleanliness:
- the test determines the rate of flow of liquid metal through a filter
- dirtier metal, containing more inclusions, should begin to block the filter and flow more slowly.
However in many cases, the filter permeability itself dominates the flow characteristics:
- apparent changes in metal cleanliness may be due to variability in filter properties.
Premetz™ allows you to analyse your Prefil™ curves, and extract meaningful information about inclusion content.