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BSW NA15 Stud Bolt
QS Fastener: BSW NA15 Stud Bolt
Name: BSW NA15 Stud Bolt
Material: Incoloy 800, Z8NC32.21
Standard: ANSI, DIN, EN
Size: M36
Length: 295 mm
Hardness: 170-220 HB
Application: For Heat Exchangers and Piping Systems
Feature: High Temperature Corrosion Resistance
Material: Incoloy 800, Z8NC32.21
Standard: ANSI, DIN, EN
Size: M36
Length: 295 mm
Hardness: 170-220 HB
Application: For Heat Exchangers and Piping Systems
Feature: High Temperature Corrosion Resistance
Quantity
The BSW NA15 Stud Bolt is manufactured from high-performance Incoloy 800 (Z8NC32.21), compliant with ANSI, DIN, and EN standards. With a specification of M36 and a length of 295 mm, it boasts a hardness range of 170-220 HB, delivering excellent performance in high-temperature and corrosive environments. Designed specifically for heat exchangers and piping systems, the BSW NA15 Stud Bolt exhibits outstanding high-temperature corrosion resistance, making it suitable for demanding industrial applications. Its reliability and durability make it an ideal choice for high-temperature and high-pressure conditions.
Corrosion Resistance of BSW NA15 Stud Bolt
Incoloy 800 is a nickel-iron-chromium alloy, and its excellent corrosion resistance makes it perform exceptionally well in acidic environments. Below is a detailed description of the performance and applications of the BSW NA15 Stud Bolt in acidic environments.
Incoloy 800 is a nickel-iron-chromium alloy, and its excellent corrosion resistance makes it perform exceptionally well in acidic environments. Below is a detailed description of the performance and applications of the BSW NA15 Stud Bolt in acidic environments.
1. Corrosion Resistance Mechanism
The corrosion resistance of the BSW NA15 Stud Bolt in acidic environments is primarily attributed to its alloy composition and the formation of a passive film:
- Alloy Composition: The alloy contains approximately 30-35% nickel (Ni) and 19-23% chromium (Cr), which form a stable passive film in acidic environments.
The corrosion resistance of the BSW NA15 Stud Bolt in acidic environments is primarily attributed to its alloy composition and the formation of a passive film:
- Alloy Composition: The alloy contains approximately 30-35% nickel (Ni) and 19-23% chromium (Cr), which form a stable passive film in acidic environments.
- Passive Film: In acidic media, a dense Cr₂O₃ (chromium oxide) passive film forms on the alloy surface, effectively preventing further acid attack.
- Self-Healing: When the passive film is mechanically damaged, chromium in the alloy rapidly diffuses to the surface, reforming the protective layer.
2. Corrosion Resistance Performance
The corrosion resistance of the BSW NA15 Stud Bolt in non-oxidizing acids such as dilute sulfuric acid, phosphoric acid, and acetic acid has been validated through the following experimental data:
- Dilute Sulfuric Acid (H₂SO₄)
- In 10% dilute sulfuric acid at room temperature, the corrosion rate is approximately 0.01 mm/year.
- In 20% dilute sulfuric acid at room temperature, the corrosion rate is approximately 0.05 mm/year.
- In 10% dilute sulfuric acid at 50°C, the corrosion rate is approximately 0.03 mm/year.
The corrosion resistance of the BSW NA15 Stud Bolt in non-oxidizing acids such as dilute sulfuric acid, phosphoric acid, and acetic acid has been validated through the following experimental data:
- Dilute Sulfuric Acid (H₂SO₄)
- In 10% dilute sulfuric acid at room temperature, the corrosion rate is approximately 0.01 mm/year.
- In 20% dilute sulfuric acid at room temperature, the corrosion rate is approximately 0.05 mm/year.
- In 10% dilute sulfuric acid at 50°C, the corrosion rate is approximately 0.03 mm/year.
- Phosphoric Acid (H₃PO₄)
- In 10% phosphoric acid at room temperature, the corrosion rate is approximately 0.005 mm/year.
- In 50% phosphoric acid at room temperature, the corrosion rate is approximately 0.01 mm/year.
- In 10% phosphoric acid at 80°C, the corrosion rate is approximately 0.02 mm/year.
- In 10% phosphoric acid at room temperature, the corrosion rate is approximately 0.005 mm/year.
- In 50% phosphoric acid at room temperature, the corrosion rate is approximately 0.01 mm/year.
- In 10% phosphoric acid at 80°C, the corrosion rate is approximately 0.02 mm/year.
- Acetic Acid (CH₃COOH)
- In 10% acetic acid at room temperature, the corrosion rate is approximately 0.002 mm/year.
- In 50% acetic acid at room temperature, the corrosion rate is approximately 0.005 mm/year.
- In 10% acetic acid at 60°C, the corrosion rate is approximately 0.01 mm/year.
- In 10% acetic acid at room temperature, the corrosion rate is approximately 0.002 mm/year.
- In 50% acetic acid at room temperature, the corrosion rate is approximately 0.005 mm/year.
- In 10% acetic acid at 60°C, the corrosion rate is approximately 0.01 mm/year.
3. Factors Influencing Corrosion Resistance
The corrosion resistance of the BSW NA15 Stud Bolt in acidic environments is influenced by the following factors:
- Acid Concentration: As the acid concentration increases, the corrosion rate accelerates, but it remains excellent in dilute acids.
The corrosion resistance of the BSW NA15 Stud Bolt in acidic environments is influenced by the following factors:
- Acid Concentration: As the acid concentration increases, the corrosion rate accelerates, but it remains excellent in dilute acids.
- Temperature: As the temperature rises, the corrosion rate increases, but it remains stable at low to moderate temperatures.
- Medium Flow Rate: In high-flow acidic media, the corrosion rate slightly increases, but the passive film remains stable.
- Impurity Content: Impurities in the acidic medium (e.g., chloride ions) may affect the stability of the passive film, but the impact is minimal at low concentrations.
4. Practical Applications
The BSW NA15 Stud Bolt is widely used in the following acidic environments:
- Chemical Industry: Used as fasteners in reactors, pipelines, and storage tanks for sulfuric acid, phosphoric acid, and acetic acid, demonstrating excellent corrosion resistance during long-term operation.
The BSW NA15 Stud Bolt is widely used in the following acidic environments:
- Chemical Industry: Used as fasteners in reactors, pipelines, and storage tanks for sulfuric acid, phosphoric acid, and acetic acid, demonstrating excellent corrosion resistance during long-term operation.
- Food Industry: Used as fasteners in equipment and pipelines exposed to organic acids like acetic acid, ensuring food safety and long-term equipment stability.
- Environmental Industry: Used as fasteners in acidic wastewater treatment equipment, performing exceptionally well in corrosive environments.
5. Conclusion
The BSW NA15 Stud Bolt exhibits excellent corrosion resistance in non-oxidizing acids such as dilute sulfuric acid, phosphoric acid, and acetic acid. Its dense passive film effectively prevents further acid attack, ensuring long-term stability and reliability of the material in acidic environments. Validated by experimental data and practical application cases, the BSW NA15 Stud Bolt is an ideal choice for acidic environments. For more technical details or custom services, please contact our technical support team.
The BSW NA15 Stud Bolt exhibits excellent corrosion resistance in non-oxidizing acids such as dilute sulfuric acid, phosphoric acid, and acetic acid. Its dense passive film effectively prevents further acid attack, ensuring long-term stability and reliability of the material in acidic environments. Validated by experimental data and practical application cases, the BSW NA15 Stud Bolt is an ideal choice for acidic environments. For more technical details or custom services, please contact our technical support team.
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