Acid Etch/Chemical/Chem Etch/Electrochemical/Electrolytic/Electromark/Etch-Marking are all descriptions for basically the same marking process – fast, efficient and very cost effective.
This process creates a stable oxidisation on the material surface; for aluminium this is generally grey, for steels this is dark grey/black, and for titanium this will range from yellow through blue to purple.
Electro-conductive metal parts are often marked for branding, identification and traceability purposes this may consist of 2D codes, alphanumerical info, data plates, logos, part & serial numbers etc.
The chemical marking process requires a small current to be passed through the material that is to be marked. A chem etch marking stencil containing the impression to be made on the part (logo, part number etc) is then attached to the surface. The graphite electrode with felt attached is then dampened with electrolyte and stroked or dabbed over the surface of the stencil to create the desired design, this will take a matter of only a few seconds.
Due to the simplicity of the Uno D electrolytic marking system it is highly portable offering very flexibly use and extremely low cost outlay. All you needs is a mains outlet available nearby to power the system from.
The items required for this process consists of the following items:
- Etch Unit (Uno D) complete with output and earth leads
- Electrolyte (suited to the material you are marking)
- Felt (Black or White depending upon suitability)
- Graphite electrode/handle (available in a range of sizes)
- Stencil (long life photographic or short run etching roll/cartridge printed types)
Dimatron manufacture long life photographic etching stencils to the designs supplied to us by our customers, these generally last for 4500+ applications before they begin to break down, see more info here. Alternatively it is possible for the end user to create their own short run stencils using direct thermal printers or p-touch devices, please find more info here.
The short run stencil types can only be used a few times before the stencil breaks down but are ideal when information changes very frequently such as for serial numbering, variable 2D codes etc.