Low-temperature oxide protects high-value parts
A
Birchwood Casey product story
Edited by the Engineeringtalk editorial team
Jan 10, 2006
High value tooling components such as toolholders, workholding and turret press tooling take on an attractive and protective black oxide finish when finished with Tru Temp.
High value tooling components such as toolholders, workholding and turret press tooling take on an attractive and protective black oxide finish when finished with Tru Temp low-temperature, nonpolluting black oxide system from Birchwood Casey.
The Tru Temp process forms a nondimensional, deep black finish with long-term corrosion resistance - the ideal surface for tooling manufactured to tight tolerances.
Tool function is not affected, yet the Tru Temp finish allows tools to be positioned as premium grade products that command higher selling prices than unblackened, or standard grade, products.
In contrast to other hot finishing methods, the low-temperature Tru Temp process can be safely operated in-house, which greatly enhances control over quality and turnaround time.
Total processing time is just 25 minutes, and operating costs (including chemical and heating cost) are only $0.04-0.06 per kilogram of finished work.
Small parts can often be processed in bulk loads while larger tools are finished on racks.
Most existing tank lines can be retrofitted at low cost to accommodate the process, or new process lines are available from Birchwood Casey in all sizes.
A major benefit of the Tru Temp process is that it operates at only 93C, thereby eliminating the severe splattering and boilover hazards often seen with conventional hot oxide tanks.
The relatively mild solutions used in the process line also prevent the formation of red coatings and white salt leaching that often plague ordinary black oxide finishes.
In addition, the Tru Temp process contains no EPA regulated chemicals so there is usually no need for waste treatment equipment.
In most areas, the rinse waters are sewerable as nonhazardous discharge.
This benefit simplifies the installation and minimises the capital investment needed to set up the process line.
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