| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for highly accurately estimating the corrosive environment, etc., of analytical instrument by performing element analysis on an Ni radical alloy constituting a heat exchanger, etc., with the specific analytical instrument. SOLUTION: In a method for estimating the use environment of an Ni radical alloy, a plurality of Ni radical metal test pieces each exposed to a plurality of different environments set in advance are created, and surface analysis is performed on the surface of each test piece by a transmission electron microscope with an energy dispersive type X-ray spectroscope to obtain the component proportions of Ni, Cr, and Fe which are major elements of an Ni radical alloy. Environment estimating curves on the relationship of the component proportions to the above-mentioned environmental conditions are created. Surface analysis is performed on the surface of an Ni radical metal sample used in an real environment by the electron microscope with a transmission energy dispersive x-ray spectroscope to obtain the component proportions of Ni, Cr, and Fe, and their values are applied to the environment estimating curves to estimate the use environment.</p> |
