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The salt spray test (or salt fog test) is a standardized and popular corrosion test method, used to check corrosion resistance of materials and surface coatings.Usually, the materials to be tested are metallic (although stone, ceramics, and polymers may also be tested) and finished with a surface coating which is intended to provide a degree of corrosion protection to the underlying metal.
The Salt Mines have a long history dating back to the Early Horizon period, with continued use throughout pre-Hispanic times and subsequent periods, including the Inca, Colonial, Republican, and Contemporary eras.