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Differences Between Stainless Steel and Acid-Resistant Steel in Tanks
Choosing the right material is a key issue when purchasing large-capacity tanks. Stainless steel and acid-resistant steel are the two most commonly used materials, but their properties differ depending on the intended use of the tank. Is it better to choose a stainless steel or an acid-resistant tank? In this article, we will explain the key differences and advise when to opt for each of these materials.
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Stainless Steel – What Are Its Characteristics in Tanks?
Stainless steel is an iron alloy with chromium (minimum 10.5%), which forms a protective layer of chromium oxide on the surface, protecting it from corrosion.
Advantages of stainless steel tanks:
- Corrosion resistance in standard atmospheric conditions
- High mechanical strength and resistance to damage
- Suitable for use in the food industry
- Easy to clean and maintain
Disadvantages of stainless steel tanks:
- Sensitivity to aggressive chemical substances
- Possibility of pitting corrosion in some environments
How Do Acid-Resistant Steel Tanks Differ?
Acid-resistant steel is a special type of stainless steel with increased resistance to chemical substances. In addition to chromium and nickel, it also contains molybdenum, which increases its resistance to acids and salts.
Advantages of acid-resistant steel tanks:
- Very high resistance to acids and salts
- Ability to store chemical substances
- Durability in harsh industrial conditions
Disadvantages of acid-resistant steel tanks:
- Higher price than regular stainless steel tanks
- Not always necessary for standard applications
Which Tank to Choose?
- Drinking water, rainwater, food industry: stainless steel tank
- Chemicals, pharmaceuticals: acid-resistant steel tank
- Fire protection systems: stainless steel tank
Summary – Key Differences
| Feature | Stainless Steel Tanks | Acid-Resistant Steel Tanks |
|---|---|---|
| Corrosion Resistance | High in standard conditions | Very high, also in chemical environments |
| Resistance to Acids and Chlorides | Medium | Very high |
| Application | Drinking water, food, fire protection, rainwater | Chemical industry, pharmaceuticals |
| Price | Lower | Higher |