Abstract
In order to find out the factors affecting dispersion of data in Corrodkote test, some experiments were carried out by means of an experimental designing method. The levels to make the dispersion small were as follows: 1) The Corrodkote paste is thickly applied to test specimens, which are then allowed to dry at the ambient temperature for 1hr before being placed in a humidity chamber. 2) Relative humidity of the exposure zone of the chamber for test cycle is maintained between 87 and 94 percent. 3) After the test cycle, the specimens are cleaned in running water using a piece of clean absorbent cotton with mild abrasive such as water paste of cleanser. 4) The points of corrosion failure are redeveloped for 2hr between 80 and 88 percent relative humidity. 5) The extent of corrosion of the specimens or other failures were examined in a lattice of 2.5×2.5mm dimensions.
