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Birchwood Lacey’s Tru Temp low-temperature black oxide process protects tooling and fixtures used in all types of manufacturing, including vehicles, subassemblies and power transmission components.

Tru Temp helps tooling designers to achieve a durable, protective finish and is suitable for automotive fixtures including tool holding, workholding, welding, fastening, gauging and associated equipment.

In storage, shipment and start-up, the Tru Temp black oxide finish serves as a protective barrier against corrosion and provides break-in lubricity and anti-galling protection.

The finish complies with MIL-DTL-13924, Class 1, and withstands 100-300 hours of salt spray.

The rich black appearance is intended to provide visual appeal.

The Tru Temp process forms a non-dimensional, deep black finish with long-term corrosion resistance.

It is suitable for components manufactured to tight tolerances, yet it does not affect function.

Owing to its crystalline structure, the Tru Temp finish delivers inherent break-in lubricity and galling resistance, thereby serving as a direct replacement for zinc phosphate finishes but without the hazardous zinc content.

This property makes it possible to operate the Tru Temp process without the need for hazardous waste treatment equipment.

The process itself operates at low temperature and does not contain any pollutants.

Unlike other hot-finishing methods, the Tru Temp process can be safely operated in house.

The total process time is 25 minutes and the operating cost (including chemical and heating costs) is just two to three cents per pound of finished work.

Most existing tank lines can be retrofitted for Tru Temp at low cost, according to the company.

New automated and manually operated process lines are also available direct from Birchwood Casey in all sizes.

The new process operates at 200F, eliminating the severe splattering and boil-over hazards often experienced with conventional hot (290F) black oxide finishing.

Tru Temp’s mild solutions prevent red coatings and white salt leaching, which often affect ordinary black oxide finishes.

The Tru Temp process does not contain metals or other pollutants, meaning that waste treatment is not required.

Rinse waters are normally sewerable as non-hazardous discharge.

This benefit simplifies installation and minimises the capital investment for setting up the process line.

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