Corrosion
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Perhaps the most common corrosion test is the Salt Mist, or Salt Fog test as it is also known, which is an accelerated corrosion test intended to duplicate under controlled conditions the corrosion performance of a component or product in the field.
Typically using a 5% salt (sodium chloride) solution sprayed onto the test sample, the test is carried out in a temperature controlled chamber. The salt mist (fog) and temperature is controlled within defined limits to ensure consistency between test runs. It is not possible to make a general statement that a certain time in the chamber is equivalent to a certain amount of time exposed on your local beach! However, it does give a good indication of the susceptibility of your product to corrosion and allows comparison of different materials and surface finishes. Other tests are also performed using more acidic solutions such as Copper-Accelerated Acetic Acid-Salt Spray (CASS) test. Typical specs: BS EN 60068-2-11:1999, IEC 60068-2-11:1981, BS EN 60068-2-52:1996, IEC 60068-2-52:1996. |
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