Marking, decoration & colour · finish comparison
Chemical Etching vs Electrochemical Etching
Chemical Etching and Electrochemical Etching are both marking & decoration finishes; electrochemical etch is the lower-cost option ($$).
Chemical Etching
Marking & decoration · $$$ · instant quote
Chemical etching uses a patterned resist and material-specific etchant to recess graphics or create a frosted contrast.
Electrochemical Etching
Marking & decoration · $$ · instant quote
Electrochemical etching makes a localized permanent mark on an electrically conductive part through a stencil and electrolyte.
When to choose which
Choose Chemical etch
Choose Chemical etch when for larger batch-imaged patterns.
- Creates fine patterns without cutting force
- Can process multiple marks in a panel batch
- Typical decorative depth is 5–100 µm
Choose Electrochemical etch
Choose Electrochemical etch when for localized conductive-metal marks.
- Marks hardened or finished conductive metals without cutting force
- Typical depth is about 2–25 µm
- Portable equipment reaches large assembled parts
What the numbers say
- Electrochemical etch is the lower-cost option ($$).
- Electrochemical etch is the thinner coating (2–25 µm), so it disturbs tight fits less.
Scores side by side
Each score is 0–100 against every finish in this catalog. Corrosion is derived from salt-spray test duration and surface hardness from the finish layer's Vickers hardness where a measured figure exists; a finish that leaves the base metal's own surface is not rated for hardness. Cosmetic, lubricity and cost are FabDigit's engineering assessment. Scores and typical figures are screening data, not matched side-by-side tests or service-life rankings; ASTM B117 is a controlled salt-fog method, not a field-life prediction.
| Score | Chemical etch | Electrochemical etch |
|---|---|---|
| Corrosion resistance | 0 Minimal | 0 Minimal |
| Surface hardness / wear | — — | — — |
| Cosmetic quality | 76 Very good | 55 Good |
| Lubricity | 10 Minimal | 10 Minimal |
| Cost | 40 $$$ | 24 $$ |
Key numbers
| Property | Chemical etch | Electrochemical etch |
|---|---|---|
| Thickness | 5–100 µm | 2–25 µm |
| Electrical | Unchanged | Unchanged |
| Colours | substrate contrast, optional paint fill | dark oxide, light etched metal, substrate contrast |
| Relative cost | Premium ($$$) | Standard ($$) |
| Added lead time | 4–8 working days | 1–3 working days |
| RoHS | Compliant | Compliant |
| Instant quote | Yes | Yes |
Bold marks the side that is ahead on a row where more (or less, for cost and lead time) is better. Ranges are the typical specification window; the drawing call-out fixes the class.
Which materials take each finish
| Material family | Chemical etch | Electrochemical etch |
|---|---|---|
| Aluminum | Yes | With care |
| Brass | Yes | Yes |
| Copper Alloy | Yes | With care |
| Glass | Yes | No |
| Stainless Steel | Yes | Yes |
| Steel | Yes | Yes |
| Magnesium Alloy | With care | With care |
| Titanium | With care | With care |
| Zinc Alloy | With care | With care |
| Polymer | Limited | No |
Chemical etch vs Electrochemical etch — frequently asked
What is the difference between Chemical etch and Electrochemical etch?
Chemical Etching and Electrochemical Etching are both marking & decoration finishes; electrochemical etch is the lower-cost option ($$). Electrochemical etch is the thinner coating (2–25 µm), so it disturbs tight fits less.
When should I use Chemical etch instead of Electrochemical etch?
Choose Chemical etch when for larger batch-imaged patterns. Conversely: choose Electrochemical etch when for localized conductive-metal marks.
Is Chemical etch or Electrochemical etch cheaper?
Electrochemical etch is the lower-cost finish ($$ against $$$ for Chemical etch) among the finishes FabDigit quotes. Both are priced per part with a lot minimum; the exact figure appears on the instant quote once the part is uploaded.