Electropolishing principle. 1 Electrolyte. 2 Cathode. 3 Work piece. 4 Partical moving from work piece to cathode. 5 Surface before polishing. 6 Surface after polishing.
<a href="//commons.wikimedia.org/wiki/User:LaurensvanLieshout" title="User:LaurensvanLieshout">LaurensvanLieshout</a>
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<span class="int-own-work" lang="en">Own work</span>