| 摘要 |
PURPOSE:To have an efficient mirror finish of surfaces to be ground, by removing especially those films formed at projected parts among passive films produced on the surfaces to be gound. CONSTITUTION:Because the amount of elution owing to electrolytic elution depends upon the electrolytic current according to Faraday's Law, an experimental result is obtained as in the diagram beside, about the relation of the surface roughness ground to the amperage density. In this case the work to be ground is stainless steel SUS304, with a surface roughness of 1mum Rmax approximately, and the amperage density is a value corresponding to the impressed voltage 3-23V. The solid line shows the experiment with a grinding time of 1min and the broken line, longer than one minute. The 4 volts is approx. 0.3A/cm<2> and 20V approx. 2.5A/cm<2> in the practical impression voltage range. Accordingly a pure mirror-finished surface with 0.3mum Rmax or less is obtained efficiently under the condition that the electrolytic liquid density is no more than 2.5A/cm<2>. |
