The effect of metal surface condition on the brightness and the structure of metal coatings. PART II, Morphology and structure of electrodeposited metal coatigs

Abstract

The properties which determine whether the metal surface is mirror bright are precisely determined by STM investigations. 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. Mirror brightness of the copper coatings and the copper surfaces polished both mechanically and electrochemically was determined by flat and mutually parallel parts of the surface which are smooth on the atomic level and which point out towards layer structure of these surfaces. Mirror bright metal surfaces can be obtained only by electrochemical polishing or electrochemical deposition in the presence of brightening addition agents. It was shown that 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, with the small degree of diffuse reflection.

Osobine koje određuju da li je metalna površina ogledalski sjajna ili ne su precizno određene AFM i STM ispitivanjima. Ogledalski sjaj metalnih površina se može povezati sa visokim stepenom ogledalske refleksije koji se približava idealnoj refleksivnosti istog metala. Ogledalski sjaj prevlaka bakra i površina bakra glačanih i mehanički i elektrohemijski je određen ravnim i međusobno paralelenim, atomski glatkim delovima površine koji ukazuju na njihovu slojevitu strukturu. Ogledalski sjajne metalne površine mogu da se dobiju jedino elektrohemijskim glačanjem ili elektrohemijskim taloženjem u prisustvu dodataka za sjaj. Pokazano je da se ogledalski sjaj metalnih površina može povezati sa visokim stepenom ogledalske refleksije svetlosti koji se približava idealnoj refleksivnosti istog metala, uz što manji stepen difuzne refleksije.