Abstract
In recent years, a lot of industrial production facilities are superannuating. These production facilities are required the high reliability. Therefore, it is important to do preservation activities before accident. However, these production facilities are used in an unfavorable environment due to many corrosive gases, humidity and etc. We are researching the damage factor of electric equipment receive by such environments. Then, we proposed the evaluating method of the complex environmental quantitative stress by such environments and the expressing method of the stress from environment numerically, temperature, humidity, gas concentration, and so on. Moreover, the washing method in order to stop degradation and realizing recovery of function for the electrical equipment from environmental influence and calamity was reported herein.