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Corrosion
Resistant Gaskets
CHO-SEAL® 6502 & 6503
Stable Corrosion Resistant EMI Shielding Gaskets
Nickel plated Aluminum (Ni/Al) Filled Silicone & Fluorosilicone
CHO-SEAL® Ni/Al materials provide the highest shielding effectiveness after long term aging testing of any EMI shielding elastomer gasket material. Ni/Al filled elastomers have the highest reliability, lowest need for field service and reduced warranty needs, reducing costs by 30 to 40%
Ni/Al particles have low transfer impedance (Per SAE ARP 1705). They are both inherently stable and have the best galvanic compatibility with Al flanges. This combination delivers the best durability and
stability. Ni/Al particle filled elastomers provide the lowest amount of flange pitting due to galvanic corrosion. CHO-SEAL Ni/Al materials reduce flange pitting on all chromate treated flanges as compared to Ag/Al filled materials by 20 to 50%. Gasket designs for use in uncontrolled environments can avoid:
• Ni or Sn plating of Al flanges and housings
• Secondary outboard nonconductive gaskets
• Secondary outer enclosures
• Complicated partial flange painting
These eliminations can reduce the cost of a durable EMI gasket system up to 45%.
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Data Sheet (.pdf)
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a Sample
Test Reports
An Evaluation of the Transfer Impedance of CHO-SEAL®® Shielded Elastomers. PER CHO-TP10 (.pdf)
An Evaluation of the Shielding Effectiveness of CHO-SEAL®® EMI Shielding Elastomers. PER CHO-TP09 (.pdf)
Galvanic Corrosion After 504 Hours of Salt Fog for CHO-SEAL® 6502, 6503, 1298, 1285, L6303 and 6370 (.pdf)
CHO-SEALŪ
1298 conductive elastomer gaskets incorporate unique particle
plating and elastomer technology for increased corrosion resistance.
This gasket material is based on a silver-plated-aluminum
filler dispersed in a fluorosilicone binder, with corrosion
inhibiting additives that contain no chromates. It offers
shielding effectiveness of 100 dB at 500 MHz and meets all
requirements of MIL-G-83528 Type D (initial and aged).
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Datasheet (.pdf)
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a Sample
Typical
Applications
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