Table 1: Simplified guidance for de

Table 1: Simplified guidance for determining corrosivity classifications according to ISO 9223 and test methods correlating to one-year corrosivity based on mass loss of steel coupons.NOTE 1 Percentage time of wetness (ToW) is defined as the number of hours during the year at which the RH is at 80% or higher and the temperature is greater than 0°C, divided by the total hours in a year. The distance and ToW parameters are simplified approximations from a corrosivity mapping tool that can be found at https://www.wbdg.org/tools/corrdefense/iso.html. NOTE 2 The cycle times for test methods 1 through 6 are fixed in the 60068-2-52 method. Each of these methods achieves steel mass loss values near the midpoints of their respective corresponding ISO 9223 classification ranges. Test methods 7 and 8, at the durations specified achieve steel mass loss near the middle of the range for the CX classification.