ISO 9227

Salt Spray Corrosion Testing

Salt spray testing subjects coated or treated metallic specimens to a controlled saline fog environment to assess corrosion resistance and coating adhesion. ISO 9227 defines three variants: neutral salt spray (NSS), acetic acid salt spray (AASS), and copper-accelerated acetic acid salt spray (CASS). Results guide coating selection for automotive, marine, and outdoor applications.

What it measures

  • Time to first visible corrosion (hours)
  • Coating adhesion after salt-fog exposure
  • Creep corrosion from a scribe line
  • Overall corrosion rating per ISO 10289 / ISO 4628
🇩🇪 DIN EN ISO 9227 🇬🇧 BS EN ISO 9227 🇫🇷 NF EN ISO 9227 🇮🇹 UNI EN ISO 9227 🇪🇸 UNE EN ISO 9227 🇳🇱 NEN EN ISO 9227 🇩🇪 DIN EN ISO 10289 🇬🇧 BS EN ISO 10289 🇫🇷 NF EN ISO 10289 🇮🇹 UNI EN ISO 10289 🇪🇸 UNE EN ISO 10289 🇳🇱 NEN EN ISO 10289
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Yadav Measurements Private

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UKAS 2437 Udaipur 313 003, IN
DIN EN 55022: 2011 CISPR 22 (1997/2006/2008) IEC/CISPR 16-2-1 CISPR 32 (2015) + A1 (2019) AS/NZS CISPR 11:2004 + 3 more
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Industries

Automotive Marine Construction Coatings Electronics

Related Standards

  • ISO 9227 Corrosion tests in artificial atmospheres -- Salt spray tests
  • ISO 10289 Methods for corrosion testing of metallic and other inorganic coatings
  • ASTM B117 Standard Practice for Operating Salt Spray (Fog) Apparatus
  • ISO 4628-3 Paints and varnishes -- Rusting assessment

Regulatory Context

This test method is referenced by:

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