ISO 7253

Introducing ISO 7253 – Industrial Physics  

ISO 7253 was an ISO international salt spray test that’s used for corrosion testing in artificial atmospheres.  

The International Organization of Standards (ISO) produce a wide range of ISO standards to guide manufacturers, production lines and laboratories when checking the integrity of packaging, products, and materials across many industries. The ISO 7253 testing standard was withdrawn and has now been replaced by ISO 9227.  

The ISO 7253 salt spray testing standard specifies the apparatus, the reagents and the procedure to be used in conducting neutral salt spray (NSS), acetic acid salt spray (AASS) and copper-accelerated acetic acid salt spray (CASS) tests to assess the corrosion resistance of metallic materials, with or without permanent or temporary corrosion protection. To perform these salt spray tests successfully to ISO 7253 testing standards you should invest in a suitable cyclic corrosion test chamber (CCT). 

The ISO 7253 corrosion testing standard also describes the method employed to evaluate the corrosivity of the test-cabinet environment. These salt spray tests are particularly useful for detecting discontinuities, such as pores and other defects, in certain metallic, organic, anodic oxide and conversion coatings. 

The different types of salt spray tests  

The neutral salt spray test (NSS) is particularly applicable to: 

• Metals and their alloys 

• Metallic coatings (anodic and cathodic) 

• Conversion coatings 

• Anodic oxide coatings 

• Organic coatings on metallic materials. 

The acetic acid salt spray test (AASS) is especially useful for testing decorative coatings of copper + nickel + chromium, or nickel + chromium. It’s also been found suitable for testing anodic and organic coatings on aluminum. 

The copper-accelerated acetic acid salt spray test (CASS) is great for testing decorative coatings of copper + nickel + chromium, or nickel + chromium. It’s also been found suitable for testing anodic and organic coatings on aluminum. 

The salt spray testing methods are all suitable for checking that the quality of a metallic material, with or without corrosion protection, is maintained. They’re not intended to be used for comparative testing as a means of ranking different materials relative to each other with respect to corrosion resistance, or as means of predicting long-term corrosion resistance of the tested material. 

Our ISO 7253 salt spray testing equipment  

So, how can Industrial Physics improve your ISO 7253 salt spray testing? 

TQC Sheen C&W Specialist Cyclic Corrosion Cabinet 

TQC Sheen C&W Cyclic Corrosion Test Chambers (CCT) are designed to deliver the precise environmental test conditions demanded by modern industry. Their reliability, ease of operation and robust construction has led to their use worldwide in all major sectors from automotive manufacture, to the paint, plastics, packaging, electronics, aerospace, military and offshore industries. 

Be sure to check out some more of the salt spray testing equipment from across the Industrial Physics portfolio. 

Need corrosion testing solutions? Get in touch  

We’ve learnt a thing or two about corrosion testing over the decades. We like to share our knowledge and we’re here to help you to answer your questions. Across the knowledgebase section of our website we publish lots of blogs on related subjects.   

For example, there’s this blog – what is Cyclic Corrosion Testing (CCT) and what is it used for? Then you could also check out this one on Bresle patch testing.  

If you have any questions about ISO 7253, or any aspect of your corrosion testing, then just get in touch!

Your global test and measurement partner for ISO 7253