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"Coloring 316 stainless steel"



2005

We manufacture an industrial type of lock and key that is machined from 316 stainless steel and then the items are electroplolished. The key is a bulkier style key than your standard house or car key. We are trying to figure out a way to color code the keys. Since the lock is comprised of 316 stainelees steel, is there a chemeical process to color coat the steel? Plastic slip-ons or dipping is not an option since the key can be placed in high heat areas. We need red, yelow, green, and blue.

Sean T McGuinness
Kirk Key Interlock Company - Ohio
^


2005

You can use next anodic process(proprietary processes also exists):
sulphuric acid(1,24).......1 lit
potassium dichromate........7,5 gr
temp........................7o-95 C
0,06 A/dm2, 1,3V lead cathode
only for 18/8 SS!

Good luck!

Goran Budija
- Zagreb, Croatia
^

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