TRU TEMP® Low Temperature, Non-Polluting Black Oxide Finish Benefits Users With High Quality, Easy-To-Apply Results

Black oxide finishing for the times calls for TRU TEMP® low temperature black oxide process. It's the safe, non-boiling and easy to operate process that uses no EPA regulated chemicals. The TRU TEMP system operates at 200° F and produces a high quality black finish without the drawbacks of ordinary high temp black oxide.

The TRU TEMP process produces a durable, satin black magnetite coating, 20 millionths thick (0.5 micron), with no effect on material hardness or tensile strength. The finish withstands up to 100-200 hours of neutral salt spray (ASTM B 117) or several hundred hours of humidity (ASTM D 1748), verified by independent testing. Mil Spec compliant, TRU TEMP's high level of corrosion protection is important for both part storage and shipment in corrosive atmospheres including ocean shipment.

In addition, the TRU TEMP finish enhances overall quality and visual appeal, thereby allowing critical components to be marketed as premium grade products that command higher selling prices than non-blackened, or oiled grade, components.

The patented TRU TEMP process utilizes a unique two-stage oxidation process that allows for the use of milder chemicals and much lower temperatures (90 degrees lower!) than the ordinary black. By comparison, the conventional 290° F hot oxide has a severe splattering and boilover tendency, making it extremely dangerous to operate. Other phosphate processes cause hydrogen embrittlement and etching of the metal surfaces. Not the case with TRU TEMP. It operates effectively with mild alkaline chemistry that does not embrittle metal or create unsightly salt bloom in and around part recessed areas.

Additional TRU TEMP advantages include short processing time of just 25 minutes, and operating cost (including chemical and heating cost) averages only $.02 to .05 per pound of finished work. Small parts can be processed in bulk loads or larger parts finished on racks. Most existing tank lines can be retrofitted for TRU TEMP at low cost. New process lines are available from Birchwood Casey including manual and automated systems in all sizes.

Most Important to today's environmentally aware manufacturers is that the TRU TEMP solutions contain no EPA regulated chemicals. There is usually no need for waste treatment equipment. In most areas, TRU TEMP rinse waters are sewerable as non-hazardous discharge. This benefit simplifies the installation and minimizes the capital investment needed to set up the process line.

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