A simple method for testing corrosiveness of atmospheres containing organic acids is presented. Testing is done by exposing lead coupons to the environment of interest at 50°C and 80per thousand RH. Following the weight gain of lead testcoupons continuously (e.g., by suspending them from an automatic balance in the test environment) provides a simple and convenient method of evaluating atmospheric corrosiveness. The ratio of cation mass to anion mass in the salt formed due to corrosion over various wood products was the same under all test conditions. The magnitude of this constant ratio suggests that basic lead carbonate (2PbCO₃Pb(OH)₂) is the principal corrosion product.