1. Polyethylene (PE)
Polyethylene is one of the most commonly used industrial polymers due to its good resistance to various acids and chemicals. It is mainly divided into two types: high-density polyethylene (HDPE) and low-density polyethylene (LDPE).
Special feature
- It possesses good resistance to diluted acids.
- High flexibility
- Moisture resistance
- Reasonable price
To use
- Easy installation
- Light
- It exhibits good resistance to aggressive environments.
restrictions
- Limited thermal resistance
- Resistance decreases at high temperatures.
Inquiry
- Acid storage tank
- Chemical supply lines
- Water supply and wastewater disposal
- Corrosion protection coating
2. Polypropylene (PP)
Polypropylene is one of the most widely used acid-resistant polymers in the chemical industry. This polymer also exhibits higher heat resistance than polyethylene.
Special feature
- Excellent resistance to sulfuric and hydrochloric acid.
- Light
- Good fatigue resistance
To use
- Good weldability
- Reasonable price
- Good chemical stability
restrictions
- sensitive to sunlight
- Relative brittleness at low temperatures
Inquiry
- Acid tank
- Treatment tower
- Chemical transport system
- Laboratory equipment
3. Polyvinyl chloride (PVC)
Polyvinyl chloride (PVC) is one of the oldest and most widely used corrosion-resistant polymers and is widely used in various industries.
Special feature
- High resistance to various acids
- Reasonable price
- Sufficient strength
To use
- Easy installation
- Moisture resistance
- Presence in the pipeline system
restrictions
- Maximum temperature
- In some cases, weaknesses are identified.
Inquiry
- Acid supply
- Chemical ventilation system
- Storage tanks for corrosive substances
4. Chlorinated polyvinyl chloride (CPVC)
CPVC is an improved version of PVC that has increased resistance to high temperatures and chemicals.
Special feature
- Compared to PVC, it has a higher heat resistance.
- Excellent acid resistance
- High wear resistance
To use
- It has proven itself well under industrial conditions.
- Long service life
- Corrosion resistance
restrictions
- Its price is higher than the price of PVC material.
- Sensitive to strong electric shocks
Inquiry
- Hot chemical supply line
- chemical equipment
- Technological systems
5. Polytetrafluoroethylene (Teflon)
Polytetrafluoroethylene (PTFE) is considered one of the most chemically resistant polymers in the world.
Special feature
- Excellent chemical resistance
- Resistant to extremely high temperatures
- low coefficient of friction
To use
- It is resistant to almost all acids.
- High thermal stability
- Long service life
restrictions
- High price
- complex production process
Inquiry
- Acid bath coating
- Filling materials and lining
- Equipment for pharmaceutical production
- Petrochemical industry
Operating characteristic of the Injecta Hydra pump
6. PVDF (Polyphenylene Fluoride)
Polyvinylidene fluoride (PVDF) is a modern engineering plastic with extremely high chemical resistance.
Special feature
- Excellent resistance to strong acids .
- Sufficient mechanical strength
- UV protection
To use
- constant
- Ideal thermal stability
- High corrosion resistance
restrictions
- The price is relatively high.
- Complexity of the production process
Inquiry
- Semiconductor industry
- chemical industry
- Pure acid supply system
7. Glass fiber reinforced plastic (GFRP)
FRP (Fire-Registered Polymerization) is essentially a polymer composite material made of resin and glass fibers.
Special feature
- High corrosion resistance
- Sufficient mechanical strength
- Light
To use
- Individual design options
- Long service life
- The costs are reasonable compared to specialty metals.
restrictions
- Sensitive to electrical discharges
- The efficiency depends on the type of resin.
Inquiry
- Acid tank
- industrial chimneys
- Cooling tower
- Chemical supply lines
8. ETFE and ECTFE
These fluorescent polymers are among the most advanced chemical-resistant materials available today.
Special feature
- Extremely high chemical resistance
- Suitable heat resistance
- UV protection
To use
- constant
- Possesses excellent resistance to highly corrosive environments.
- Good mechanical stability
restrictions
- High costs
- Access restrictions
Inquiry
- Petrochemical industry
- Special tanks
- Coating of equipment
Comparison of acid-resistant polymers
| polymer | Chemical resistance | Thermal resistance | It’s worth it | Industrial applications |
|---|---|---|---|---|
| officer | Yes | half | fewer | Storage tanks and pipelines |
| pages | Yes | Yes | fewer | chemical industry |
| Polyvinyl chloride | Yes | half | fewer | plumber |
| Vinyl chloride | very good | Yes | half | thermal process |
| Polytetrafluoroethylene | Great | Great | higher | Specialized industries |
| Polyphenylidene fluoride | Great | Yes | higher | advanced industries |
| Fiberglass | Yes | Yes | half | large storage tanks |
Factors that influence the selection of acid-resistant polymers.
The choice of a suitable polymer depends not only on the type of acid , but also on the following factors:
sour
Each polymer reacts differently to different acids.
acid concentration
The polymer may be resistant to dilute acids, but decomposes at high acid concentrations.
Operating temperature
An increase in temperature generally leads to a decrease in the chemical resistance of polymers.
work pressure
Some polymers can deform under high pressure.
Environmental conditions
Ultraviolet radiation, humidity and weather conditions can affect the properties of polymers.
Advantages of using polymers instead of metals
In many application areas, polymers offer significant advantages over metals:
- Rust-resistant
- Weight
- Reduced installation costs.
- Under certain conditions, it exhibits increased chemical resistance.
- Reduced maintenance costs
However, if mechanical strength and high temperature resistance are required, metal may be the more suitable option.
Application of acid-resistant polymers in various industries
chemical industry
It is used in the construction of storage tanks, reactors and pipelines for the transport of corrosive substances.
Water supply and wastewater disposal
In chemical supply systems for water treatment.
Food and pharmaceutical industries
This is due to its high resistance to chemicals and its purity.
Oil and gas industry
It is used for coating equipment and production lines.
Mining
It serves to transport sludge and acids that are produced during mineral processing.
The future of acid-resistant polymers
Technological advances are continuously leading to the development of new polymers with higher chemical resistance and improved mechanical properties. Today, composite nanomaterials, reinforced polymers, and intelligent corrosion protection coatings are fundamentally changing the future of the chemical industry.
The use of acid-resistant polymers is expected to increase significantly in the coming years, particularly in industries with high requirements for acid resistance.
In conclusion
Acid-resistant polymers play a crucial role in modern industry. Thanks to their excellent chemical resistance, low weight, cost-effectiveness, and durability, these materials are an ideal alternative to many metals in aggressive environments.
Each polymer, such as polyethylene, polypropylene, PVC, CPVC, PTFE, and PVDF, has its own properties and applications. Therefore, the selection should be made taking into account the type of acid, temperature, pressure, and operating conditions.
Selecting suitable acid-resistant polymers can extend the service life of equipment, reduce maintenance costs, and improve the safety of industrial processes.