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Hard Natural Rubber (SEMI and EBONITE)

Better chemical and heat resistance than soft natural rubber. Wide application in organic and inorganic acids and chlorine gas. Specific grades have excellent permeation resistance and heat resistance.

Advantages

  • Moderate cost
  • Ease of application and repair
  • Ease of cure
  • Excellent chemical and permeation resistance
  • Heat resistance up to 200°F (93°C)

Considerations

  • Not oil resistant
  • Not flame resistant
  • Subject to damage by cold weather exposure or sudden extreme temperature changes

Types:

  • Semi-hard
  • General purpose Ebonite
  • FDA compliant and electroplating tank Ebonite (no graphite)
  • Chlorine and hot brine resistant Ebonite (graphite)

Uses:

  • Chemical process tanks, agitators, mixers, pumps, fans, water treatment columns
  • Plating tanks (nickel, copper, cadmium)
  • Pipe and fittings
  • Pickling tanks

Do not use:

  • For chrome plating tanks
  • For nitric or hydrofluoric acid
  • Where abrasion is severe
  • Where oil is present



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