There are three distinct test method in ISO the neutral salt spray (NSS), the acetic acid salt spray (AASS), and copper-accelerated acetic. ISO NSS. adv. auto technology banner. A discussion started in but continuing through Q. We have a customer, that we supply some zinc. The salt spray (or salt fog) test is a standardized and popular corrosion test method, used to Other important relevant standards are ISO, JIS Z and ASTM G The most common test for steel based materials is the Neutral Salt Spray test (often abbreviated to NSS) which reflects the fact that this type of test.

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These standards describe the necessary information to carry out this test; testing parameters such as temperature, air pressure of the sprayed solution, preparation of the spraying solution, concentration, pHetc.

This test nsa also referred ido as an ASS test. Dear Brian and Davey, Thank you very much for your answers. Proof sent to secretariat or FDIS ballot initiated: This is followed by 3. Brian Terry has directly answered your question, but please post your situation rather than an abstract question so that readers can best help you.

But benchmarking performance is something altogether different. That’s the only way to know for sure.

Salt spray tests in accordance with DIN EN ISO NSS / AASS / CASS | IGOS, Solingen

Such tests are commonly referred to as modified salt spray tests. What is major difference between ISO [link by ed. Test duration depends on the 2927 resistance of the coating; generally, the more corrosion resistant the coating is, the nss the period of testing before the appearance of oxides. Website design by Peter Bourne Communications. Though believed to be accurate at the time of writing, this may change over time.


A personal good afternoon to all, I am Jose of Curitiba, I am a ns inspector, I am a specialist in the area of Salt Spray, and have a problem and knowing of the competence of all readers in corrosion, perhaps they can help me. This spray is set to fall-out on to the specimens at a rate of 1.

Testing periods range from a few hours e. For this reason the salt spray test is most often deployed in a quality audit role, where, for example, it can be used to check the effectiveness of a production process, such as the surface coating of a metallic part. Corrosion tests and standards: Remember that accelerated testing is not a proper indication of real world performance. It also describes the method nds to evaluate the corrosivity of the 2927 cabinet environment.

Equivalence between ASTM B vs. ISO NSS

The salt spray methods are all suitable for checking that the quality of a metallic material, with or without corrosion protection, is maintained.

This test can be used to test the relative resistance to corrosion of coated or uncoated aluminium alloys and other metals, when exposed to a changing climate of acidified synthetic seawater spray, followed by a high humidity, both at an elevated temperature.

Test specimens are placed in an enclosed chamber, and exposed to 1 of 2 possible changing climate cycles. Something totally different like zinc-alloy plating, organic coatings, etc.

Contact Ascott for Further Information. ASTM G85 is an example of a test standard which contains several modified salt spray tests which are variations nsx the basic salt spray test.

However, these testing standards neither provide information of testing periods for the coatings to be evaluated, nor the appearance of corrosion products in form of salts. The salt spray test is one of the most widespread and long established corrosion tests. From beautiful Pine Beach New Jersey: This test can be used to test the relative resistance to corrosion of coated and uncoated metallic specimens, when exposed to a salt spray climate at an elevated temperature.


From Wikipedia, the free encyclopedia. Hot-dip galvanizing produces zinc carbonates when exposed to a natural environment, thus protecting the coating nnss and reducing the corrosion rate. All nsss presented is for general nsz and does not represent a professional opinion nor the policy of an author’s employer.

ASTM does not address this issue, but ISO does not recommend it and if it is to be done, advocates a thorough cleaning.

Corrosion tests in artificial atmospheres – Salt spray tests

By using this site, you agree to the Terms of Use and Privacy Policy. Chamber volumes vary from supplier to supplier.

Test specimens are placed in an enclosed chamber, and exposed to a changing climate that comprises the following 3 part repeating cycle. Views Read Edit View history. Check out our FAQs. So this information should not be used as a substitute for referring to a complete test standard, at an appropriate revision level. Requirements isl agreed between customer and manufacturer.

Equivalence between ASTM B-117 vs. ISO 9227 NSS

ASTM B was the first internationally recognized salt spray standard, originally published in Retrieved from ” https: Most commonly, the time taken for oxides to appear on the samples under test is compared to expectations, to determine whether the test is passed or failed.

Such details are provided in the appropriate product specifications.

Is there any equivalence between this two standards? They are not intended jss 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. Any ISO standard is available for this Testing? This is followed by 2.

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