Coatings & Corrosion
Corrosion protection for rare earth magnets
Environment-based guidance for selecting coatings and corrosion controls.
Last updated on 2026/01/26
Why corrosion control matters
NdFeB magnets corrode quickly without protection. Corrosion increases scrap, weakens assemblies, and leads to early field failures.
Environment-to-coating guide
| Environment | Risk profile | Typical protection approach |
|---|---|---|
| Indoor, dry | Low | Standard Ni-Cu-Ni |
| Humid indoor | Medium | Nickel or epoxy depending on exposure |
| Outdoor, splash | High | Epoxy or higher-performance coatings |
| Chemical exposure | Very high | Specialized coatings + sealing |
Design factors to confirm
- Surface finish and coating thickness tolerance.
- Assembly process (press-fit vs bonded).
- Edge exposure where coating can chip.
RFQ checklist for corrosion control
- Define environment and exposure cycles.
- Specify coating and any acceptable alternatives.
- Provide tolerance targets after coating.
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Share your drawings, grades, coatings, and quantities. We will coordinate supplier feedback and confirm specs.
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