Hard Natural Rubber (SEMI and EBONITE)
Advantages
- Moderate cost
- Ease of application and repair
- Ease of cure
- Excellent chemical and permeation resistance
- Heat resistance over 200° F
- Physically tough
Disadvantages
- 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 (graphitic)
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. (A trace of nitric or mild hydrofluoric present in a process tank may not be objectionable.)
- Where abrasion is severe
- Where oil is present
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