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The phrase “salt-spray test” describes an accelerated corrosion test that is applied to various products and materials to assess their performance in a salty environment.
Usually, a saline solution is sprayed on the material to be tested once it is placed inside a chamber.
It is significant to note that, given that the materials are exposed to a very high concentration of sodium chloride (typically 5% NaCl), many of the natural variables that cause corrosion are not taken into account in this test. The concentration of salt in this mixture is alarmingly high, as it is rarely found in outdoor applications.
The following parameters are used when conducting salt-spray tests:
The test samples are placed into a chamber at a predetermined temperature (usually 35ºC) and misted or finely sprayed with a 5% sodium chloride saline solution.
The duration of the test can range from 24 to 1000 hours. Throughout the trial, the samples are maintained at a constant temperature and moisture content. To ensure that the saline solution covers the entire surface, each sample is also rotated at regular intervals.
Oxidation of the sample’s surface is the test’s outcome. The number of hours needed before the sample’s surface exhibits oxidation for the first time is measured. The numer of hours before 5% of the surface oxidizes is one of the other techniques.
Jolly Clamps come with a variety of surface treatments and are made of different materials. The article’s resistance to corrosion is determined by the combination of these two factors.
According to ASTM B117 (Standard Practice for Operating Salt Spray).
