| 摘要 |
PROBLEM TO BE SOLVED: To provide a testing method capable of extremely increasing the correlation with degradation in the actual outdoor exposure, in a combined cycle test for making a painting steel plate degrade artificially. SOLUTION: A sample of the painting steel plate is fixed in an isothermal constant-humidity tank capable of keeping arbitrary temperature and humidity, and a plurality of cycles are repeated. The cycle comprises (a) a process of atomizing salt water with respect to the sample in the isothermal constant-humidity tank (preferably, 2 hours), (b) a process of continuously radiating ultraviolet rays by a metal halide lamp, sprinkling water at every fixed period, and cleaning the surface of the sample (preferably, 16 hours), and (c) a process of stopping the radiation of the ultraviolet rays and maintaining a state of high humidity (preferably, 2 hours). COPYRIGHT: (C)2008,JPO&INPIT
|
