Mu-Metal Chemical Etching

Mu-Metal is a Nickel-Iron soft ferromagnetic alloy designed to serve as a low-frequency magnetic shielding material. It features high permeability and is often composed of 80% Nickel, 20% Iron, and small amounts of other metals, depending on the formula and design criteria. Mu-Metal is often referred to by the trademarked brand names Hy-Mu 80™ and Permalloy80™.

When an externally applied magnetic field is present, Mu-Metal domains magnetically re-align and generate a new external field. The superposition of the two fields results in a lower observed field.

Hy-Mu 80 and Permalloy80 Chemical Etching

Fotofab’s etching process produces designs that can withstand harsh indoor and outdoor environments. The process uses an acid (Ferric Chloride) to etch the unprotected parts of a metal surface to create a design or image formed to your project’s specifications.

Characteristics of Mu-Metal

Stronger than pure nickel, Monel alloys are resistant to corrosion by many agents, including rapidly flowing seawater. Other characteristics include:


Contact Our Precision Etching Experts Today

Fotofab is ISO & AS9100D Certified, ITAR Registered, and RoHS compliant.
Get in touch if you have questions or are ready to start your custom project.

Acid Etched Mu-Metal Applications

By varying the levels of Nickel, Iron, and other metals in Mu-Metal formulations, the alloy can exhibit differing levels of permeability and magnetic shielding properties. As a result, acid etching of Mu-Metal is used in a variety of applications, including:

Other Factors

    Sign Up for Our Newsletter