Galvanic Corrosion Protection

Large group of bolts with NYSHIELD application coating on white background


NYSHIELD® is effective in preventing galvanic corrosion between steel fasteners and the most extreme lightweight materials – which include both magnesium and carbon fiber. NYSHIELD® is applied very uniformly to the steel fastener surfaces that contact dissimilar materials, and shields / protects the least noble material. This product has minimal clamp load loss even up to 125°C, has exceptional chemical resistance and adheres well to most substrates.

NYSHIELD® protects steel fasteners from galvanic corrosion in high risk material combinations:

  • – OTHERS



  • Provides exceptional galvanic corrosion resistance (steel fasteners with magnesium or carbon fiber substrates)
  • Provides general corrosion protection (15+ year vehicle life simulation)
  • Coating Uniformity: typical thickness is 50-75 microns
  • No interference with HEX or TORX drive
  • Low clamp load loss at elevated temperatures (125°C)
  • Adjustable Coefficient of Friction (typically between 0.10– 0.16)
  • Excellent adhesion
  • Exceptional chemical resistance
  • Good toughness / durability
Performance Results
  • Corrosion Resistance (steel vs. carbon fiber, steel vs. magnesium) is exceptional after 15 year simulation exposure (GMW17026) (See download for results)
  • Coefficient of Friction results are adjustable (typical range 0.10 – 0.16) (See download for results)
  • Clamp Load Loss Test & Results at: 125°C / 973hr: comparable to control bolt without NYSHIELD® (See download for results)
  • Tape Adhesion Test: 10 days @ 40°C in 100% RH chamber, cross hatch cut in coating/tape pull: no removal of coating (Per GMW14829) (See download for results)
  • Chemical Resistance Tests: • 24 hour soak (engine oil, coolant, transmission fluid, power steering fluid, windshield washer fluid, vehicle cleaning agent, transit coating/protective wax, car shampoo, paintwork cleaning product) • 2 hour soak (E10 fuel, E85 fuel, diesel fuel, Windex, Rain-X, 2-in-1 glass cleaner, remover for transit coating, washer fluid) • 10 minute soak (tar and road oil cleaner, chrome cleaner) • Results: no visual change in coating appearance: no noticeable softening of coating (See download for results)
  • Durability: Good corrosion resistance after coated fastener is subjected to drop test
Manufacturing Specifications
  • GM
    • GMW17796

For more information regarding NYSHIELD® coating services, contact:
NYLOK at (586) 786-0100 or


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