What Is a Nitric Acid Storage Tank?
A nitric acid storage tank is a heavy-duty industrial container built to hold and transport highly corrosive acid. You will typically find these tanks in chemical processing plants, fertilizer production facilities, explosives manufacturing, and pharmaceutical factories.
Because nitric acid needs to be moved from factories to end-users, these tanks are not just stationary ground silos. The material is also widely used to build mobile rail tankers and road tank trucks. Working with strong oxidizing acids is dangerous. If the tank material fails, it causes severe environmental damage and factory downtime. Therefore, choosing the right metal plate is the most critical step for tank manufacturers.
Why High-Purity Aluminum Is Used for Nitric Acid Tanks
You might wonder why soft metal like aluminum is used to hold aggressive acids. The answer is a chemical reaction called passivation.
When high-purity aluminum alloys (containing ≥99.5% Al), such as 1060 or 1070, touch concentrated nitric acid, they react instantly. However, instead of being eaten away, the aluminum forms a very dense, microscopic layer of aluminum oxide (Al₂O₃) on its surface.
This oxide film has three amazing features:
- Chemically Stable: It does not react further with the acid.
- Insoluble: The strong acid cannot dissolve this layer.
- Highly Adherent: It sticks tightly to the base metal and does not peel off.
The oxide layer acts like a waterproof shield. It perfectly isolates the raw aluminum metal from the acid liquid, stopping all further corrosion.
Strict Working Conditions
Aluminum is highly effective, but it is not magic. It only works under very specific conditions. As a buyer or engineer, you must check your working environment before you buy aluminum sheets for a nitric acid tank.
| Parameter | Strict Requirement |
| Acid Concentration | ≥ 80% (Must be concentrated nitric acid) |
| Working Temperature | ≤ 50°C |
| Medium Stability | Keep water out. Do not dilute the acid. |
Important Warning:
Aluminum handles concentrated acid perfectly. However, if the nitric acid is diluted with water to a 20%–30% concentration, the passivation film breaks down. The diluted acid will eat through the aluminum tank extremely fast. Always ensure your storage system stays above 80% concentration.
Not sure if aluminum is safe for your specific chemical concentration or temperature? Send your tank working conditions to our engineering team. GNEE will provide a free material safety check within 24 hours.
Recommended Aluminum Alloys
For nitric acid tanks, you must use 1000-series pure aluminum. We recommend three main grades based on your budget and purity needs.
| Alloy | Aluminum Purity | Key Features | Best Application |
| 1070 | ≥ 99.7% | The best corrosion resistance. | High-end acid tanks, strict chemical storage. |
| 1060 | ≥ 99.6% | Most popular and cost-effective. | Standard industrial storage tanks and rail tankers. |
| 1050A | ≥ 99.5% | Good formability and basic protection. | General chemical containers. |
Common Tank Plate Sizes and Structure
When building a large tank, manufacturers want to use the largest plates possible. Bigger plates mean fewer welding seams. Fewer seams mean less risk of acid leaks and lower labor costs for welding.
Recommended Dimensions
| Parameter | Standard Range |
| Thickness | 3 mm – 10 mm |
| Width | 1000 mm – 2200 mm |
| Length | 2000 mm – 12000 mm |
Tank Structure Design Tips
Tank Shell: Built by rolling and welding large, thick aluminum plates longitudinally.
Tank Heads (End Caps): The ends of the tank need to be cold-formed or stamped into a curved shape. For these parts, you must buy aluminum plates in the O temper (fully annealed). O temper makes the metal soft enough to bend without cracking.
Contact GNEE today to get the minimum order quantity (MOQ) and price for your exact dimensions.
Chemical Composition Comparison 1050A vs 1060 vs 1070 Aluminum Alloys
| Element | 1050A (%) | 1060 (%) | 1070 (%) |
|---|---|---|---|
| Al | ≥ 99.50 | ≥ 99.60 | ≥ 99.70 |
| Si | ≤ 0.25 | - | - |
| Fe | ≤ 0.40 | - | - |
| Si + Fe | - | ≤ 0.40 | ≤ 0.20 |
| Cu | ≤ 0.05 | ≤ 0.05 | ≤ 0.04 |
| Mn | ≤ 0.05 | ≤ 0.03 | ≤ 0.03 |
| Zn | ≤ 0.05 | ≤ 0.05 | ≤ 0.04 |
| Ti | - | ≤ 0.03 | ≤ 0.03 |
Key Insight for Buyers:
Higher aluminum purity (1070 > 1060 > 1050A) → better corrosion resistance in concentrated nitric acid
Lower Fe and Cu content → significantly improves passivation stability
1070 is preferred for high-end chemical storage; 1060 offers the best cost-performance balance
Mechanical Properties
1000-series aluminum is not a hard structural metal like the 5000-series. Its strength is lower, but its ductility (ability to stretch and bend) is outstanding. This is exactly what you want when forming curved tank heads.
| Alloy | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| 1060 | O | 60 – 95 | ≥ 25 | ≥ 25 |
| 1070 | O | 65 – 100 | ≥ 30 | ≥ 25 |
| 1050A | O | 60 – 100 | ≥ 20 | ≥ 25 |
These properties make the metal very easy to TIG or MIG weld using 1070 or 1100 welding wire.
Aluminum vs Other Materials
| Material | Corrosion Resistance (in >80% HNO₃) | Weight | Cost | Major Risk |
| High-Purity Aluminum (1060/1070) | Excellent | Low | Medium | Highly sensitive to acid dilution. |
| Stainless Steel (304L/316L) | Moderate | Heavy | High | Prone to pitting corrosion over time. |
| Standard Carbon Steel | Poor | Heavy | Low | Rapid and severe acid corrosion. |
Email us your project volume, and we will send you a direct cost comparison to help you win your project bid.
Manufacturing & Quality Control
Tank failure is not an option. GNEE enforces strict quality control to ensure every plate is ready for pressure vessel use.
Production Process:
Hot Rolling & Annealing: The ingots are hot-rolled into thick plates and then annealed in a furnace to reach the soft O temper.
Precision Leveling: We use large tension levelers to ensure the plates are perfectly flat. Flat plates mean easier automated welding for your factory.
Surface Cleaning: We ensure the surface has no oil, dirt, or deep scratches that could trap contaminants.
Testing Methods:
Every batch undergoes chemical testing via spectrometer, mechanical pull tests, and surface inspections. We provide a full Mill Test Certificate (MTC) matching EN or ASTM B209 standards with every shipment.
Thickness Tolerance
Accurate thickness is important for smooth welding. If the plate thickness jumps up and down, your welding seam will be weak. GNEE strictly follows international tolerance standards.
| Thickness Range | Tolerance Limit |
| 0.5 – 3.0 mm | ±0.03 mm |
| 3.0 – 6.0 mm | ±0.05 mm |
| 6.0 – 10.0 mm | ±0.08 mm |
Packaging & Delivery
Aluminum plates must be protected from sea salt and moisture during ocean freight. Otherwise, they will develop white rust before they even reach your factory.
Export Packaging Standards
Anti-scratch interleaving: Thin paper or plastic film is placed between every single plate.
Waterproof wrapping: The stack is wrapped in thick kraft paper and sealed in PVC film.
Wooden pallets: We use strong, fumigation-certified wooden pallets so your forklift can unload them safely.
Steel strapping: The bundle is tightly secured to prevent shifting inside the container.
Shipping & Loading
| Container Type | Average Loading Capacity |
| 20FT GP | 15 – 24 tons (Best for heavy, short plates) |
| 40FT GP/HQ | 20 – 26 tons (Best for plates over 5.8 meters long) |
Delivery Time:
Stock material: 7 – 15 days to the port.
Custom sizes: 15 – 30 days for fresh production.
Ocean freight rates change every week. Want to know the total landed cost to your local seaport? Send us your required tonnage and destination port, and we will calculate the shipping cost for you today.
How We Calculate Price
Final Price = SMM Aluminum Ingot Price + Factory Processing Cost + Freight
| Price Component | Details |
| SMM Price | The daily base price of pure aluminum ingots on the Shanghai Metals Market. |
| Processing Fee | The factory cost to roll, cut, and pack the plates. This drops significantly if you order full container loads. |
| Freight | The truck and ocean shipping cost to your location. |
Get a Quote Today
Don't let raw material shortages slow down your tank manufacturing schedule. GNEE is ready to supply your next project.
To get an accurate price, please tell us:
- Alloy needed (1060, 1070, or 1050A)
- Dimensions (Thickness x Width x Length)
- Total Quantity (Tons or Pieces)
- Application (Are you building a stationary tank or a road truck?)
We will reply within 24 hours with a firm quotation, an updated SMM price sheet, and a fast delivery schedule.