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Magnet Coatings

Coating rare earth magnets is a crucial step in enhancing their performance and longevity. The coating acts as a protective shield, guarding against rust and degradation. Beyond preservation, coatings can improve the magnets’ resistance to temperature variations and mechanical stress, ensuring optimal functionality in diverse applications. Selecting the right coating is essential for maximizing the potential of these remarkable magnetic materials.

PLATING / COATING COLOR THICKNESS Salt Spary
Test (hr)
Tw (°C) PRICE INDOOR USE ABRASION
RESISTANCE
HUMIDITY WATER SALTY AIR SALTWATER GLUE
ADHESION
Nickel (Ni-Cu-Ni) Silver 10-20 Microns >48 ≤230 Low Good Good Good Acceptable Acceptable Acceptable Acceptable
Black Epoxy (Ni-Cu-BE) Black 10-20 Microns >48 ≤230 Medium Best Bad Best Best Good Good Acceptable
Chemical Nickel (Ni-Cu-Ni-ChNi) Silver 10-20 Microns >7 ≤230 High Best Good Best Best Best Best Good
Teflon® (PTFE) Blue 250-500 Microns >48 ≤230 High Best Best Best Best Best Best Bad
Zinc (Zn) Silver-Gray 5-15 Microns >24 ≤160 Low Good Acceptable Acceptable Acceptable Bad Bad Good
Gold (Ni-Cu-Ni-Au) Gold 10-25 Microns >48 ≤230 High Good Good Good Acceptable Acceptable Acceptable Acceptable
Silver (Ni-Cu-Ni-Ag) Silver 10-25 Microns >48 ≤160 High Good Good Good Acceptable Acceptable Acceptable Acceptable
Tin (Ni-Cu-Ni-Sn) Silver 10-25 Microns >72 ≤160 Medium Good Bad Good Acceptable Good Acceptable Acceptable
Bare Epoxy (BE) Black 10-30 Microns >72 ≤120 Medium Best Acceptable Best Best Good Good Acceptable
Everlube® 6155 Silver-Gold Satin 8-25 Microns >96 ≤230 High Best Best Best Best Best Best Acceptable
Parylene (Parylene C) Grey 8-15 Microns >96 ≤230 Medium Good Bad Good Acceptable Good Acceptable Bad
Passivation (Surface Prep) Grey 0.1-0.5 Microns N/A ≤230 Low Acceptable Acceptable Bad Bad Bad Bad Best
Plastic (ABS) Various >800 Microns N/A ≤160 High Best Best Best Best Best Best Good