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. Call (952) 937-7931 or visit [www.birchwoodcasey.com/metal].
