| 摘要 |
PURPOSE:To enhance the resistance against corrosion and eliminate any fear of giving injury on human body due to the leak of contents even when a child accidentally gulps a battery, by using a high chromium stainless steel containing the specified amount of chromium as the positive can. CONSTITUTION:Content of chromium in a high chromium stainless steel used as the positive can 1 is set to 23% or more and for example SUS447J1, SUS329J1, SUS329J2, SUS10S or the like is used. A platinum plate is used as the opposing pole, it is immersed into artificial gastic juice, and, a voltage is applied across the terminals and corrosion starting voltage is measured. According to this measurement, corrosion starting voltage becomes high suddently when content of chromium becomes 23% or more, showing a distinctive difference in composition with the stainless steel containing chromium of 21% or less. |
