Salt fog tests are highly accelerated corrosion tests intended mostly for material or surface coating corrosion resistance characterization purposes.
Corrosion (salt spraying) is useful for evaluating the quality and the uniformity of protective coatings. In coastal areas all equipments and materials are exposed to salt spray atmospheres. Salt fog can reach the equipment also during transportation on sea or on the roads in winter time. These conditions are simulated in Salt Fog chamber.
Typical international test standards used are IEC 60068-2-11: Salt mist and ASTM B117. A typical corrosion test is Neutral Salt Spray with 5% NaCl solution performed in chamber temperature of +35 °C. Modified Salt Spray Tests can be based on cyclic test procedure with humidity or acidified (ph modified) test procedure.