Comparison of suitable application scenarios for different resin types
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This post was last edited by Wang Wei2 on 2026-5-28 at 10:14. When selecting resins for industrial wastewater tanks, it is necessary to take into account factors such as the corrosiveness of the wastewater, temperature, and operating conditions. The basic approach is to first determine the level of corrosion and then select an appropriate resin system. The suitable resins for different scenarios are as follows:**Selection of Resins for Industrial Wastewater Tanks**
When choosing resins for industrial wastewater tanks, it is essential to consider the corrosiveness of the wastewater, temperature, and operating conditions. The key step is to determine the degree of corrosion first, after which an appropriate resin system can be selected. The suitable resins for various scenarios are listed below:
| Resin Type | Key Advantages | Suitable Industrial Wastewater Scenarios | Expected Service Life |
|-------------|----------------|------------------------------------------|----------------------|
| Epoxy Resin | Strong adhesion, good cost-performance, well-established manufacturing process | General-concentration industrial wastewater (weak acids/bases, ordinary wastewater); suitable for tanks such as treatment tanks and sedimentation tanks | 5–8 years; the glass flake-enhanced version can last 8–10 years |
| Vinyl Ester Resin (Bisphenol A/Phenolic type) | Resistant to strong acids and bases, high temperature tolerance, excellent water resistance | Chemical wastewater with strong acids and bases, high-salt landfill leachate, pharmaceutical/electroplating wastewater; suitable for temperatures up to 120°C | 10–20 years – three times longer than that of ordinary epoxy resins |
| Unsaturated Polyester Resin | Low cost, easy to apply | Industrial wastewater tanks with mild corrosion levels | Shorter than vinyl ester resins; suitable for applications with limited budgets and mild corrosion |
| Water-based Polyurea Resin | Fast curing time, can be applied to wet surfaces | Outdoor wastewater tanks, rapid renovation of old or new tanks, projects with tight deadlines | Suitable for wet environments; good crack resistance and immersion tolerance |
**Suggestions for Precise Selection**
Choose the resin based on the level of corrosion: For mild corrosion (COD ≤ 500 mg/L, weak acids/bases), solvent-free/water-based epoxy resins are the best choice, as they offer the best cost-performance ratio； In the case of severe corrosion (strong acids and bases, high salt concentrations, organic solvents), a vinyl ester resin + glass flake system must be used, as it provides more stable impermeability and corrosion resistance. Choose based on operating temperature: If the wastewater temperature remains above 60°C for extended periods, vinyl ester resin is the preferred choice, as it can withstand high temperatures of up to 120°C; epoxy resin has limited resistance to high temperatures. Adjustments for special scenarios: For outdoor pools, polyurethane resin is the preferred choice, as it offers better UV resistance and aging resistance ； For wet substrates or projects with tight deadlines, using water-based polyurea resins can shorten the construction period.