Salt Spray Test Standards and Time Regulations for Stainless Steel Plates

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Introduction to Salt Spray Testing

 

Salt spray testing is an accelerated corrosion test method used to evaluate the corrosion resistance of metal materials, widely used in quality control for materials such as stainless steel plates. By simulating a salt spray environment, the corrosion resistance of materials in actual use can be quickly assessed.

 

Common Salt Spray Test Standards

 

There are several international and national standards for salt spray testing. Below are some common salt spray test standards:

 

  • ASTM B117

  • Full Name: Standard Practice for Operating Salt Spray (Fog) Apparatus
  • Overview: Developed by the American Society for Testing and Materials (ASTM), it is one of the most widely used salt spray test standards.
  • Test Conditions: Uses a 5% salt solution, with the temperature maintained at 35°C.
  • Applications: Suitable for testing the corrosion resistance of various metal materials.

  • ISO 9227

  • Full Name: Corrosion Tests in Artificial Atmospheres – Salt Spray Tests
  • Overview: Developed by the International Organization for Standardization (ISO), it is used to evaluate the corrosion resistance of materials and coatings in salt spray environments.
  • Test Conditions: Similar to ASTM B117, it uses a 5% salt solution, with the temperature maintained at 35°C.

  • JIS Z 2371

  • Full Name: Methods of Salt Spray Testing for General Use
  • Overview: Developed by the Japanese Industrial Standards (JIS), it is widely used in Asia.
  • Test Conditions: Similar to ASTM B117 and ISO 9227, it uses a 5% salt solution, with the temperature maintained at 35°C.

 

Salt Spray Test Time Regulations

 

The duration of salt spray tests depends on the material and application requirements. Common test durations are as follows:

 

  • ASTM B117 and ISO 9227

  • 24 hours: Preliminary test duration used for quick evaluation of material corrosion resistance.
  • 48 hours: Longer test duration, providing better reflection of material performance in harsher environments.
  • 96 hours: Used for materials requiring high corrosion resistance.
  • 240 hours and above: For materials with extremely high corrosion resistance requirements, such as those used in marine environments.

  •  JIS Z 2371

  • 24 hours to 1000 hours: The test duration is adjusted according to specific application needs, with longer test durations better reflecting the long-term corrosion resistance of materials.
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Conclusion

 

Salt spray testing is an effective accelerated corrosion test method, with common standards including ASTM B117, ISO 9227, and JIS Z 2371. Test durations range from 24 hours to 1000 hours, depending on material performance and application requirements. Through salt spray testing, the corrosion resistance of metal materials such as stainless steel plates can be quickly assessed, ensuring their reliability in actual use.

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