The effect of metal surface condition on brightness and structure of metal coatings. PART I, Surface reflection of the light

Abstract

Mirror brightness of metal surfaces can be associated with the high degree of mirror reflection which approaches very nearly the ideal reflectance of the same metal. The samples of steel and copper are processed by electrochemical polisher in corresponding electrolytes for electrochemical polishing. On previously mechanically, and further electrochemically polished samples surface roughness and surface reflection were measured. The effect of decreasing surface roughness of electrochemically polished samples was shown compared to only mechanical polished samples. Following the changes in the relation of the mirror, the total and the diffuse reflection, it is confirmed that it came to significant increase of brightness of the surface polished by electrochemical method, compared to initial surface, both for steel samples and for copper samples.

Ogledalski sjaj metalnih površina se može povezati sa visokim stepenom ogledalske refleksije koji se približava idealnoj refleksivnosti istog metala. Uzorci čelika i bakra su podvrgnuti elektrohemijskom glačanju u odgovarajućim elektrolitima za elektrohemijsko glačanje. Na prethodno mehanički, a zatim elektrohemijskim glačanim uzorcima merena je hrapavost površine i refleksija svetlosti. Pokazan je uticaj smanjenja površinske hrapavosti elektrohemijski glačanih uzoraka u odnosu na samo mehanički glačane uzorke. Prateći promene odnosa ogledalske, ukupne i difuzne refleksije potvrđeno je da je došlo do značajnog povećanja sjaja površine glačane elektrohemijskim putem u odnosu na polaznu površinu, kako za uzorke čelika tako i za uzorke bakra.