Chemical Tankers: Lining Solutions using Bromobutyl Rubber for Acid Resistance
Problem Statement
Chemical tankers transporting concentrated acids face severe material degradation. Conventional rubbers like NBR and EPDM exhibit poor resistance to acidic environments, leading to swelling, cracking, and delamination. These failures compromise tank integrity and safety.
Material Science Analysis
Bromobutyl rubber excels in acid resistance due to its halogenated structure. The bromine groups provide superior chemical inertness, preventing acid penetration and swelling. Unlike NBR, which degrades in acidic media, Bromobutyl maintains structural integrity. Its low permeability also minimizes acid diffusion, ensuring long-term performance.
Technical Specs
- Shore A Hardness: 50-70
- Tensile Strength: 10-15 MPa
- Elongation at Break: 400-600%
- Temperature Range: -40°C to +150°C
- Compression Set: ≤20% (70 hours at 150°C)
Material Comparison
| Material | Acid Resistance | Temperature Range (°C) | Compression Set (%) | Permeability |
|---|---|---|---|---|
| Bromobutyl Rubber | Excellent | -40 to +150 | ≤20 | Low |
| NBR | Poor | -20 to +120 | ≥50 | High |
| EPDM | Moderate | -40 to +150 | ≤30 | Moderate |
Standard Compliance
RubberQ adheres to IATF 16949 standards for batch-to-batch consistency. Our Bromobutyl formulations comply with ASTM D2000 for material callouts and ISO 3601 for sealing performance. Surface preparation and bonding processes meet ASTM D429 adhesion testing requirements.
CTA
For custom material compound development or IATF 16949 documentation, consult RubberQ’s engineering department.
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