Etching NiTinol with Multi-Etch

NiTinol wires. By Petermaerki (CC BY-SA 3.0).

NiTinol wires. By Petermaerki (CC BY-SA 3.0).

How to etch nickel titanium, or NiTinol, 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 NiTinol

Etch rates for NiTinol, oxide removal, using Multi‑Etch
Process Etch time (minutes)
150–160°F double strength 3
Etch rates for NiTinol, after oxide removal, using Multi‑Etch
Note: Sample degreased with Simple Green.
Process Etch time (minutes) Etch depth (inches, cumulative total) Etch depth (millimeters, cumulative total)
150–160°F double strength
1 0.00012 0.003
2 0.00033 0.0083
3 0.00073 0.0186
4 0.00133 0.0339
5 0.00223 0.0566
6 0.00345 0.0876
7 0.00484 0.1229
8 0.00643 0.1632
9 0.00828 0.2102
10 0.01024 0.2602

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 NiTinol.

Tips and tricks when etching with Multi-Etch

Ordering Multi-Etch

Multi-Etch can be ordered throughout the world! View the list of Multi-Etch retailers.

Questions? You can contact Multi-Etch by phone or email.