Combined with the test results of glow discharge nitriding, edge effect of metals during DC glow discharge plasma treatment was investigated. According to the related theory of sheath, the sheath thickness S, electric field intensity E and ion density n in the corner of the work piece and its vicinity were analyzed qualitatively. The results show that the S increases, E and n decrease when far from the work piece edge in the edge effect range d. The decrease of the main plasma density n0 make the influence range d of the edge effect larger, thu...
