Blackfast process
Room temperature black oxide, also called cold blackening, is a surface treatment that turns steel and cast iron parts black in a series of process baths at around 20 °C. At Phibo this process is called Blackfast.
Two options
Anyone who decides to blacken at room temperature has two options. The difference is how often parts have to go through.
A series of process baths, each one a step in the process. Parts go into the bath by hand, and a semi-automatic or fully automatic line is possible too. The system stays ready to run.
After thorough degreasing you apply the paste with a brush. That lets you blacken steel and cast iron without investing in a complete installation.
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Why room temperature
Hot blacking happens above 140 °C, in a boiling bath. The Blackfast process works at around 20 °C, and one minute in the blacking bath is enough. That changes four things.
No material loss and no build-up, even on fits and threads. Hot blacking can distort your parts.
Safe chemicals that are simple to use, instead of splashes and fumes from a boiling bath.
No boiling bath and no complex extraction. Hot blacking requires an expensive installation and high energy costs.
In hot blacking, cast iron turns brown. At room temperature you get a uniform deep black, with better corrosion resistance for indoor applications.
From fluid to line
Degreaser, conditioner, blacking fluid and corrosion protector, plus the process tanks and the paste.
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The nine points from our brochure, side by side, from temperature to the colour of cast iron.
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The entry level set-up for blacking parts up to 300 x 200 x 200 mm by hand.
ViewReferences
Automotive
Aerospace
Metalworking
Pharma
Rubber and plastics
RailIn practice
Applications
The process suits any precision part in steel or cast iron, turned or milled. Think of gears, bolts and nuts, hydraulic parts and tooling components.
Consumables
A blacking line runs on a degreaser, a conditioner, a blacking fluid and a corrosion protector.
The process fluids, the blacking paste and the protective equipment are in stock. You order them from the same partner that supplies your line.
Assistance and service
You arrange maintenance, repairs and spare parts directly with Phibo. Our own technicians do the work.
We schedule the inspection of your blacking line and follow it up. The content is agreed with you.
Spare parts come from our own warehouse. Our technicians carry out the repair.
Your operators learn to set, monitor and adjust the baths, from commissioning onwards.
Send us the material of your parts, their dimensions and the number per day. You will receive a proposal with the blacking line that fits. One partner, from the first conversation to the last spare part.