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Utilizing a unique two-stage oxidation (patent pending), the Tru Temp® process forms a black magnetite finish on all iron and non-stainless steel parts. The Tru Temp process operates effectively at much lower temperatures than ordinary black oxide- 100 degrees lower, in fact! The result is a protective black finish- .000020" (1 micron) thick, with an attractive satin black appearance equal to that of regular black oxide.
Let's face it. The 290°F operation of ordinary black oxide is scary hazardous! The typical bath contains 6-8 pounds of caustic soda per gallon, and is prone to boil-over and splattering. This creates a worker safety nightmare! By comparison, the Tru Temp bath is much milder and cooler -- severe hazards are just not present.
The Tru Temp blackening reaction takes only 6-10 minutes, compared with 20-40 minutes for ordinary hot oxide. As a result, the entire process is shorter and the work flows through faster, resulting in lower labor costs. Since labor is the largest single cost factor of any blackening system, your overall finishing costs are reduced significantly.
The Tru Temp system contains no heavy metals, carcinogens or other EPA regulated materials. The rinse water effluent from the process line is generally sewerable, usually with pH adjustment only. (Check with your local authorities)
If you now own a black oxide system, or send parts outside for blackening, the Tru Temp in-house blackening system provides a better option for you. You can regain control of your black finishing, without endangering your employees or compromising the quality of the black finishes. The process meshes easily with your Quality and Inventory systems by giving you control over the quality, scheduling and cost of your finishing operation.
An ordinary hot oxide bath is very viscous and difficult to rinse off. Blind holes and recessed areas often form white salt blooms which destroy the value of the finished part and upset customers! Because the Tru Temp solution is much milder and cooler, it rinses freely. White salt blooms are a thing of the past! Castings and powdered metals turn out a rich black. Note that the Tru Temp black finish complies with MIL-C-13924C, Class 1 and is corrosion resistant. It withstands 100-300 hours salt spray, depending on the sealant used. Tru Temp™ Examples
| Durable, Satin Black Magnetite |
Durable, Satin Black Magnetite |
| .000020" Thick |
.000020" Thick |
| Mil Spec Compliant |
Mil Spec Compliant |
| No Salt Bloom |
Salt Bloom Common |
| 190° F Bath, 12-18 min process |
290° F Bath, 15-50 min process |
| No Splatter or Boilover |
Constant Boilover Hazards |
| No Sludging |
Heavy Sludging |
| All non-stainless steels |
Most steels (Some Turn Red) |
| Cast Irons |
No Cast Irons (Turn Red) |
| Powdered Metal |
No Powdered Metal (Salt Bloom) |
| No EPA Regulated Materials |
No EPA Regulated Materials |
| Safe to operate |
Scary Process |
| Operator Friendly |
Operators Hate It! |
Tru Temp - High Quality Black Finish Without Salt Bloom
Tru Temp Comparison Examples | More Tru Temp Examples | Automotive Samples
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