Salt Fog or Salt Spray Testing

Salt fog (aka salt atmosphere or salt spray) testing exposes components to a fine salt fog mist that can result in rusting or corrosion of susceptible materials.  Samples to be tested are hung or placed on a rack inside of the salt fog chamber at the orientation that is specified in the applicable test method or otherwise agreed to with the customer.  The orientation during testing is important as unintended corrosion can result if the salt fog is allowed to condense and pool on the sample.  The samples are then exposed to a salt fog of defined salt content.  The salt solution used to provide the salt fog mist is usually a 5 percent by weight NaCl solution with the pH adjusted close to 7.0.  The salt fog condensate rate is monitored during the test to verify that the test requirements are met.

Continue Reading Salt Fog or Salt Spray Testing