Metglas Etchants

Metglas, also known as amorphous metal, is a type of metallic glass with unique properties such as high magnetic permeability, low core loss, and excellent corrosion resistance. Chemical etching of Metglas is a process used to create precise patterns, markings, or designs on Metglas surfaces, often for manufacturing components in the electronics and power distribution industries. Here’s a guide on commonly used methods for etching Metglas and how to set important parameters for effective Metglas etching:

Commonly Used Metglas Etchants

  1. Hydrochloric Acid (HCl) and Hydrogen Peroxide (H2O2) Mixture


  • Transformers: Metglas is often used in the cores of high-efficiency transformers. Etching may be employed for pattern creation and for quality control.
  • Inductors: Metglas inductors are used in various electronics applications, and etching can be used to shape and mark these components.

Setting Parameters:

  • Concentration: The mixture of hydrochloric acid and hydrogen peroxide can vary depending on the specific etching requirements. Common concentrations range from 5% to 20% for hydrochloric acid and 3% to 10% for hydrogen peroxide.
  • Etching Time: The etching time varies based on the desired result and the thickness of the Metglas, ranging from minutes to several minutes.
  • Temperature: The etching process is often performed at room temperature, but the specific temperature may vary depending on the application.

Setting Parameters in a Metglas Etching Operation

For an effective Metglas etching operation using the hydrochloric acid and hydrogen peroxide mixture as an example:


  • Mix the hydrochloric acid and hydrogen peroxide in the desired proportions for the specific etching task. Be precise and exercise caution as both chemicals can be hazardous.

Etching Time:

  • Determine the appropriate etching time based on the desired pattern or surface modification. Start with a short duration and adjust as needed.


  • Perform the etching at room temperature or the appropriate temperature for your specific application.


  • Prioritize safety when working with hydrochloric acid and hydrogen peroxide. Always wear appropriate personal protective equipment (PPE) such as gloves, safety goggles, and lab coats. Maintain a well-ventilated workspace with safety showers and eyewash stations.


  • Maintain proper ventilation to dissipate fumes and gases generated during the etching process. Use a fume hood if available.

Waste Disposal:

  • Dispose of used etchant solutions following local regulations, as hydrochloric acid and hydrogen peroxide waste can be hazardous. Proper handling and disposal are crucial.

If you have an Metglas etching project that you need help with, please contact us