Meaning of neutral salt spray test

Jan 01, 2016 · Neutral Salt Spray Testing NSS testing uses the oxygen-concentration cell corrosion mechanism to accelerate corrosion for use in performance analysis on a variety of substrates and coatings. Adding sodium chloride (NaCl) at a concentration of 5 percent keeps the corroded metal ions in solution so that they can act as conductors to enhance the corrosive effect.

Neutral salt spray (NSS) testing is an accelerated corrosion test, which is used to predict the suitability of a protective coating. This is achieved by exposing test panels or components in a chamber, where they are continuously exposed to sodium chloride (salt) mist at an elevated temperature for a set period of time.

Corrosion Resistance: A 5% neutral salt spray test is carried out as per ASTM B-117 to determine the corrosion resistance of plated items. This is most important test in evaluating EN plated samples. The Corrosive conditions to which EN Plated components are exposed, can be classified as mild, moderate and severe. (ii) Exposure to ASTM B117 (Neutral salt spray test) (22); The difference in the thickness between intermediate and topcoats of Systems 2 and 3 is the key parameter influencing their performance in neutral salt spray lest. Salt Spray is a method used for pretreatment and paint qualification, as well as quality assurance purposes. People speak of their paint specification being 1000 hours salt spray, but what does this really mean? Without criteria for evaluation, all this means is the painted part was placed in a salt spray cabinet for 1000 hours.

May 14, 2017 · Salt spray testing of stainless steels Introduction Salt spray testing is an accepted method for assessing the suitability of stainless steel parts and fabrications that are likely to encounter chloride environments in service. Jan 01, 2016 · Neutral Salt Spray Testing NSS testing uses the oxygen-concentration cell corrosion mechanism to accelerate corrosion for use in performance analysis on a variety of substrates and coatings. Adding sodium chloride (NaCl) at a concentration of 5 percent keeps the corroded metal ions in solution so that they can act as conductors to enhance the corrosive effect. On the other hand, the neutral salt spray is used for metal, alloys, metallic coating, anodic oxide coating and organic coatings. And this becomes the responsibility of the manufacturer to make the clients understand that there is no need to perform all the tests when purpose can be served by one test. corrosion test is the salt spray test. However, this test can unfortunately sometimes lead to the elimination of economic grades that could be suitable for an application. It can even lead to modification of the classification of grades, as a result of creating different mechanisms of corrosion. Salt spray testing (fog) is popular because it is well standardized and reasonably repeatable. Salt spray tests are widely used in the industrial sector, marine, automotive, air craft, and military equipment for the evaluation of corrosion resistance of parts or finished surfaces.