Etching tantalum with Multi-Etch
How to etch tantalum with Multi-Etch, the safer alternative to hydrofluoric acid
Multi-Etch was originally developed for use on titanium, and is a perfect low-acid (pH 6.8) alternative to hazardous hydrofluoric (HF) acid for etching tantalum
Preparing tantalum for anodizing using Multi‑Etch
Not usually necessary. Sometimes tantalum arrives with mill oxides which are hard to see and may require etching to get good color. For many small parts, use a tumbler with ceramic media moistened with double strength Multi-Etch; tumble for approximately 15 minutes.
|Note: times are for removing high-voltage green completely; lower voltage colors will take less time to remove.|
|Process||Etch time (minutes)||Surface change|
|150–160°F double strength||64||Matte|
|Process||Etch time (minutes)||Etch depth (inches, cumulative total)||Surface change|
|150–160°F double strength|
Step-by-step guides on etching with Multi-Etch
The guides below demonstrate etching with titanium, but the order of steps are the same for etching tantalum.
Tips and tricks when etching with Multi-Etch
Questions? You can contact Multi-Etch by phone or email.