| 摘要 |
PROBLEM TO BE SOLVED: To enable earlier detection of degradation of coating such as heavy-duty coating, etc. SOLUTION: A coating degradation detection method includes a step S101 of setting temperature (heating temperature) when an endothermic peak appears through a well-known differential scanning thermal analysis, as an initial value. Describing in more detail, the differential scanning thermal analysis is used to measure a temperature change of heat flow at an initial coating time of a measuring object. The heat flow is equivalent to a difference in temperature between a measuring object material and a reference material in the differential scanning thermal analysis. In the measured temperature change of heat flow, the endothermic peak appears. During this time, the endothermic peak is detected in a range of temperature lower than a glass-transition temperature of coating film (material constituting the coating film), and the temperature when the endothermic peak appears is set as the initial value. COPYRIGHT: (C)2013,JPO&INPIT |
