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Home / News / Knowledge / Metallographic Sample Preparation for Electromagnetic Shielding Materials

Home / News / Knowledge / Metallographic Sample Preparation for Electromagnetic Shielding Materials

Metallographic Sample Preparation for Electromagnetic Shielding Materials

Electromagnetic shielding coatings serve as core protective materials for 5G communications, precision electronics and new energy equipment. Featuring ultra-thin profiles, superior shielding efficiency and wide compatibility, they effectively block electromagnetic interference and prevent signal leakage, enabling stable operation of electronics under complex electromagnetic environments. They are now the mainstream lightweight electromagnetic shielding solution.

Metallographic sectioning is the critical inspection method to analyze shielding coating quality. Following standardized specimen preparation procedures including sampling, mounting, grinding and polishing, we can visually inspect cross-sectional coating thickness uniformity and interfacial bonding conditions.

Metallographic testing delivers accurate coating quality evaluation, links shielding performance to service life, supports formula optimization for R&D teams and controls process deviations during mass production. It provides key data to guarantee reliability and stability of electromagnetic shielding products.

Below is the metallographic specimen preparation workflow for cross-section analysis of electromagnetic shielding materials for your reference:

1️⃣ Rough grinding with P800 abrasive paper to flatten the surface

2️⃣ Fine grinding with P2000 & P4000 abrasive papers

3️⃣ Polishing using ET-JP polishing cloth with 0.05 μm AO-W alumina suspension

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