PFA Coated Chemical Storage Tank

A PFA coated chemical storage tank is a storage vessel with a carbon steel or stainless steel shell and an internal PFA (perfluoroalkoxy) anti-corrosion coating applied through high-temperature spraying. PFA, known as "soluble Teflon," combines PTFE's excellent corrosion resistance with thermoplastic processability. Designed for storing strong acids (e.g., nitric acid, sulfuric acid, hydrofluoric acid), strong alkalis, organic solvents, and various corrosive chemicals, these tanks are widely used in fine chemicals, petrochemicals, pharmaceuticals, pesticides, semiconductors, and environmental protection industries.

Technical Specifications

Working Principle

The corrosion resistance principle of PFA coated chemical storage tank is based on the extremely high chemical inertness and density of PFA material. The fluorine atoms in PFA's molecular structure form "armor-like" protection around the carbon chain, making it nearly non-reactive with any chemical substance. The coating is firmly bonded to the metal substrate through high-temperature sintering, effectively isolating corrosive media from the metal shell. Additionally, PFA's extremely low surface energy provides excellent non-stick and self-lubricating properties, preventing media adhesion and crystal buildup to ensure smooth discharge.

Key Advantages

1. Full-Spectrum Chemical Corrosion Resistance

PFA coating resists fluorine, chlorine, bromine, iodine, strong acids, strong alkalis, and nearly all organic solvents. Whether handling nitric acid, sulfuric acid, hydrofluoric acid, aqua regia, or mixed acids, Zhuoyan's PFA coated chemical storage tanks provide reliable protection. The coating remains unchanged even when boiled in aqua regia—the ultimate solution for chemical equipment corrosion protection.

2.Wide Temperature Range Stability

PFA coating operates stably over a wide temperature range from -80°C to +260°C. In 2024, Zhuoyan successfully developed Shandong Province's first large-diameter reactor PFA lining, achieving exceptional uniformity at just 0.8 mm coating thickness, with performance far exceeding customer expectations. The equipment performs flawlessly under extreme conditions including high-temperature vacuum and rapid thermal cycling—no cracking, no peeling.

3.Superior Anti-Permeation Performance

PFA exhibits excellent anti-permeation performance against various gases and chemical media including oxygen, chlorine, water vapor, carbon dioxide, and hydrochloric acid. The coating's density ensures this "last line of defense" is impenetrable, completely solving the industry challenge of permeation corrosion. Traditional coated equipment typically has a service life of only 2-3 years, while Zhuoyan's PFA coated chemical storage tanks extend service life to 8-15 years.

4.Strictly adhere to the spraying process

Every Zhuoyan product undergoes strict processes and 3 comprehensive inspections: from material inspection, grinding, high-temperature degreasing, and sandblasting, to multiple spray sintering cycles, spark testing, coating thickness measurement, and adhesion testing. Every step from raw material to finished product is strictly controlled to ensure impeccable quality.

Application Fields

Zhuoyan PFA coated chemical storage tanks are suitable for the following industries and applications:

1. Fine Chemicals: Storage of strong corrosive chemicals including concentrated nitric acid, sulfuric acid, hydrochloric acid, mixed acids, chlorosulfonic acid, hydrofluoric acid

2. Petrochemicals: Storage tanks for halogenated hydrocarbons, ketones, esters, benzene series, and other organic solvents

3. Pharmaceuticals/Pesticides: Active pharmaceutical ingredient acidic mother liquor, halogenated intermediates, fluorine-containing pharmaceutical raw materials

4. Semiconductor/Electronics: Ultra-pure chemical storage, etching solutions, high-purity reagents (PFA's extremely low leachable metals meet ppb-level purity requirements)

5. Environmental Protection/Wastewater Treatment: Waste acid, waste hydrofluoric acid, high-salt corrosive wastewater, fluorine-containing wastewater transfer tanks

6. New Energy/Lithium Battery: Lithium fluoride, lithium hexafluorophosphate raw materials, hydrofluoric acid storage tanks

Coating Process Flow

The core coating process for Zhuoyan PFA coated chemical storage tanks is as follows:

Packaging & Delivery

1. Packaging: Inner layer with pearl cotton/bubble wrap protection; outer layer with wooden crates or steel frames to ensure no impact damage during transit.

2. Protection: All openings sealed to prevent foreign matter ingress.

3. Shipping: Supports sea, land, and rail transport; FCL or LCL available per customer requirements.

FAQ

Q1: What chemicals can Zhuoyan PFA coated chemical storage tanks resist?

A1: PFA coating resists strong acids (including hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid, aqua regia), strong alkalis, halogens (fluorine, chlorine, bromine, iodine), organic solvents (halogenated hydrocarbons, ketones, esters, benzene series)—nearly all chemical media.

Q2: What is the difference between PFA and PTFE?

A2: PFA (perfluoroalkoxy) and PTFE (polytetrafluoroethylene) both belong to the fluoropolymer family. PFA combines PTFE's excellent corrosion resistance with thermoplastic processability, allowing uniform coating application on complex-shaped equipment via spraying. Operating temperature range: -80°C to +260°C.

Q3: What is the equipment service life?

A: Traditional coated equipment typically has a service life of only 2-3 years, while Zhuoyan PFA coated chemical storage tanks, manufactured under strict process control, extend service life to 8-15 years.

Q4: What after-sales services does Zhuoyan provide?

A: Zhuoyan provides one-stop services from working condition analysis, material selection, process design to manufacturing, installation guidance, and after-sales maintenance. All products come with a warranty, with professional technical teams offering remote or on-site support.

Q5: Can non-standard sizes be customized?

A: Yes. Zhuoyan provides fully customized PFA coated chemical storage tank solutions based on specific working condition requirements, including capacity, material, structural configuration (vertical/horizontal), coating thickness—all customizable.