Ano
Service
Type II anodizing, clear and black.
Sulfuric anodize to MIL-A-8625 in clear and black, Class 1 and Class 2, for corrosion protection, paint adhesion, and a clean uniform finish on machined aluminum.
In one paragraph
What is Type II anodizing?
Type II is the standard sulfuric acid anodize. It converts the aluminum surface into a hard, corrosion-resistant oxide layer that can stay clear with a matte finish or take dye for black and color work. It is the workhorse finish for machined aluminum parts, and we run it every day to MIL-A-8625 in Class 1 (non-dyed) and Class 2 (dyed).
TYPE II DYED · CUSTOMER PARTSWhy shops send it here
Run in our own tanks, held to your date.
Type II work comes to us from machine shops that need a finishing partner who does not become the bottleneck. Standard turnaround is 3 to 4 days, expedites move as fast as same day, and we pick up and deliver within 100 miles of Paoli.
Where it fits
Type II or Type III, decided in one table.
| DRIVER | TYPE II | TYPE III HARD COAT |
|---|---|---|
| Corrosion resistance | Strong | Strong |
| Color and appearance | Clear, black, full dye range | Clear and black |
| Wear and abrasion | General service | The reason it exists |
| Cost profile | The value call | Step up when wear leads |
Need conductivity kept intact instead? That is chem film territory. Unsure what the drawing intends? Send it over and we will read the callout with you. The controlling specification is MIL-A-8625, published on the government's ASSIST library at quicksearch.dla.mil.
How it runs in Paoli
A Type II job, dock to dock.
Quote from the print
Send the drawing, the alloy if you know it, the class callout, and the count. The quote comes back by email with the date on it.
Rack and clean
Parts are racked for current and drainage, then cleaned and etched so the oxide grows on bare, uniform metal. Racking decides finish quality, which is why our rackers are named on the About page.
Anodize, dye, seal
The sulfuric bath grows the coating to the callout. Class 2 parts take dye before the seal locks the surface.
Inspect, pack, return
QC checks the batch against the print, parts pack the way they arrived, and the truck or the box heads back. Standard clock: 3 to 4 days.
Questions
Common questions on this service
Does Type II change part dimensions?
Anodizing grows an oxide layer partly into and partly out of the surface, so tight-tolerance features need the coating accounted for. Put the callout on the print and we finish to it.
Can you keep threads and bores bare?
Yes. We mask and plug to your print. See masking, plugging, and assembly.
What does it cost?
Minimum fees depend on the required services, so we quote each job from the print and the count rather than a flat rate card.
What alloys take Type II well?
Most machined alloys run beautifully, including the common 6xxx series. Some high-copper and high-silicon alloys anodize darker or less uniformly; tell us the alloy and we will set expectations on the quote.
Do you handle production runs or just batches?
Both. Repeat production work is a core lane, and process control keeps reorders matched run to run.
Type II on your print, back in 3 to 4 days.
Send the drawing and the count. If you need it faster, say so, and we will expedite as fast as same day.