| 摘要 |
<P>PROBLEM TO BE SOLVED: To quantitatively and quickly test metal corrosiveness for a large number of insulating materials, in research for developing a novel insulating material. <P>SOLUTION: The insulating material 1 is immersed into pure water 2 to prepare an extract 1a, and the metal corrosiveness of the insulating material 1 is evaluated based on a metal dissolution rate into the extracts 1a. The metal dissolution rate is evaluated based on a potential difference between a metal electrode 5 comprising evaluation objective metal and a reference electrode 6, by immersing the electrodes 5, 6 into the extract 1a and reference pure water 4. Alternatively, the extract 1a is divided into two, the metal is immersed/dissolved into one thereof, and a metal dissolved amount is quantitatively determined thereafter by adding a color reaction reagent to the both the extracts to comparing coloring thereof. <P>COPYRIGHT: (C)2008,JPO&INPIT |
