ASTM G85 A5 Test

ASTM G85 ANNEX 5 (A5) - Dilute Electrolyte Cyclic Fog/Dry Test

ASTM G85 Annex 5 (A5) is a cyclic corrosion test that uses a solution of sodium chloride and ammonium sulfate which is much more dilute than traditional salt fog (spray). The fog portion of this test is conducted at room temperature, the dry-off portion, however, is performed at an elevated temperature. Also the spray atomizing air is not saturated with water for this test.

Salt Solution: The salt solution is a mixture of 0.05% sodium chloride and 0.35% ammonium sulfate. This creates a fog (spray) which is much more dilute than traditional fog (spray).

pH Range: 5.0 – 5.4

Test Temperatures: There is no heating applied to the cabinet during the fog period. During the dry-off period the temperature throughout the exposure zone shall remain constant at 35 +/- 1.5°C (95 +/- 3°F) within ¾ hour of switching from the fog period to the drying period. This test does not use humidified air. 

Test Cycle: 1 hour of fog followed by 1 hour of dry off time.

MIAMI-DADE COUNTY, FLORIDA

DEPARTMENT OF REGULATORY AND ECONOMIC RESOURCES PRODUCT CONTROL SECTION

Source：https://www.miamidade.gov/building/library/checklists/fasteners-wood.pdf