Abstract
Before the development of the accelerated corrosion testing method simulating the actual environment of electrical appliances, the actual corrosion of the surface treated steel sheets used in electrical appliances was investigated. The electrical appliances were collected from four domestic regions in Japan. In addition, the amount of deposited sea salt of the electrical appliances and the temperature and humidity of the environment for which the electrical appliance was used was measured. For the air conditioner outdoor units, the distance from the seashore and the host site influenced it for the corrosion rate. Moreover, the amount of deposited sea salt was confirmed as the main corrosion factor in the air conditioner outdoor units and the washing machines. On the other hand, the corrosion of the refrigerators was minor. The amount of deposited sea salt and the temperature and humidity of the environment were different by the kind of the electrical appliances. It is thought that the difference of the environment used influences the difference of the corrosion of the surface treated steel sheets of the electrical appliances. It is important for the development of the accelerated corrosion testing method simulating the actual environment of electrical appliances to control the amount of deposited sea salt widely and to evaluate the corrosion rate. Moreover, it is desirable that the temperature and humidity is changed keeping absolute humidity constant and that the time of wetness of the testing environment sets to 50% or less.
