OBRABOTKAMETALLOV Vol. 27 No. 2 2025 technology Ta b l e 2 Surface microgeometry Treatment Surface profile section (2.5 mm) Roughness parameters Without Treatment Ra = 28,6 Rz = 114 Chemical treatment (30 min) Ra = 23,2 Rz = 103 CET and chemical treatment (15 min) Ra = 19,3 Rz = 94,2 CAT and chemical treatment (10 min) Ra = 16,2 Rz = 80,5 USPD (10 sec) Ra = 13,6 Rz = 76,3 The profile of the micro-irregularities of the control sample consists of alternating protrusions with rounded peaks and depressions, with a predominance of protrusions. The maximum profile height is Rmax = 174 µm. Following CT, the profile exhibits a similar relief but with a reduced height of the protrusions and a slightly increased width of the depressions. The arithmetic mean deviation of the profile, Ra, decreases from 28.6 to 23.2 µm.
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