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
ProcessEtch time (minutes)
150–160°F double strength3
Etch rates for NiTinol, after oxide removal, using Multi‑Etch
Note: Sample degreased with Simple Green.
ProcessEtch time (minutes)Etch depth (inches, cumulative total)Etch depth (millimeters, cumulative total)
150–160°F double strength
10.000120.003
20.000330.0083
30.000730.0186
40.001330.0339
50.002230.0566
60.003450.0876
70.004840.1229
80.006430.1632
90.008280.2102
100.010240.2602

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.