Wheel Materials vs. Chemical Compatibility Guide
Casters and Wheels need to operate in a wide range of environments. Chemical exposure can greatly reduce the lifespan of certain materials so it's essential to pick the right wheel materials as compared to the chemical environments those wheels will be exposed to. Use our guide to see what wheels best fit your application. As always if you have any questions give us a call or contact us.
Wheel Materials vs. Chemical Compatibility Guide
Casters and Wheels need to operate in a wide range of environments. Chemical exposure can greatly reduce the lifespan of certain materials so it's essential to pick the right wheel materials as compared to the chemical environments those wheels will be exposed to. Use our guide to see what wheels best fit your application. As always if you have any questions give us a call or contact us.
Hydrogen Sulfide
H₂S
Hydrogen Sulfide Caster Compatibility
Chemical Overview
Molecular Formula: H₂S
Physical Properties: Hydrogen sulfide is a colorless gas with a rotten egg odor. It has a boiling point of -60.3°C, a melting point of -85.5°C, and a density of 1.36 g/L at 25°C. It is slightly soluble in water (4 g/L) and highly toxic and flammable. (Source: PubChem)
Industrial Applications
Hydrogen sulfide is encountered in:
- Oil and Gas: As a byproduct in refining and natural gas processing.
- Chemical Synthesis: In producing sulfur compounds.
- Wastewater Treatment: In anaerobic digestion processes.
- Exposure Scenarios: Gaseous exposure or aqueous solutions in industrial settings may contact caster wheels on equipment carts.
Wheel Material Compatibility Summary
Best Suited Materials (A/B Ratings): Polyolefin (A) and Phenolic (B) resist H₂S corrosion. Ductile Cast Iron and Forged Steel (B) are suitable with minor corrosion risks.
Materials to Avoid (C/D Ratings): Avoid Elastomer, Rubber, and Thermoplastic Rubber (C/D) due to potential degradation from prolonged exposure.
Wheel Compatibility Table
| Wheel Material | Interaction Description | Rating |
|---|---|---|
| Ductile Cast Iron | Minor corrosion possible in wet H₂S environments. | B |
| Elastomer | Degradation possible with prolonged exposure. | C |
| Forged Steel | Resistant but may corrode slightly in wet conditions. | B |
| Neoprene/Nylon Glass Core | Neoprene may degrade; nylon core resists well. | B |
| Nylon | Good resistance; minimal degradation. | B |
| Nylon Glass Filled | Similar to nylon; slightly better stability. | B |
| Phenolic | Resistant to H₂S; minimal impact. | B |
| Polyolefin | Excellent resistance; unaffected by H₂S. | A |
| Polyurethane on Aluminum Core | Polyurethane may degrade slightly; aluminum resists. | C |
| Polyurethane on Iron Core | Polyurethane degrades; iron may corrode slightly. | C |
| Rubber | Degradation likely with prolonged exposure. | D |
| Solid Elastomer | Moderate degradation possible. | C |
| Thermoplastic Rubber | Degrades with H₂S exposure. | D |
| Urethane | Moderate degradation; not ideal. | C |
| V-Grooved Iron | Minor corrosion in wet H₂S conditions. | B |
Conclusion
Hydrogen sulfide is compatible with Polyolefin wheels (A rating) and Phenolic (B rating). Avoid Rubber and Thermoplastic Rubber (D ratings) due to degradation. For assistance, contact CasterTech.