The roughness of silver coatings electrodeposited onto aluminium

Abstract

In this paper the surface roughness of silver coatings electrodeposited as final coatings onto aluminum was analyzed. The copper coating was electrodeposited as a basic coating directly onto aluminum. Afterward, nickel and copper coatings from acidic bath were deposited. Silver was electrodeposited on the acidic bath copper coating. Also the influence of fluorides in the solution for direct electro deposition of basic copper coatings on the structure of the final silver coating was investigated. The surface roughness was measured with device TR 200. Silver coatings can be successfully electrodeposited as a final coating onto aluminum with nickel and copper inter coatings.

U radu je analizirana površinska hrapavost elektrohemijski istaloženih prevlaka srebra, kao završnih prevlaka na aluminijumu. Bakarna prevlaka taložena je galvanostatski neposredno na aluminijum kao osnovna prevlaka. Nakon toga je taložena prevlake nikla i kao završna prevlaka taložena je prevlaka srebra. U radu je takođe ispitivan uticaj prisustva fluorida u elektrolitu za direktno elektrohemijsko taloženje prevlaka bakra na strukturu završne prevlake srebra. Površinska hrapavost je merena uređajem TR 200. Pokazano je da se prevlaka srebra može uspešno neposredno elektrohemijski nanositi na aluminijum kao završna prevlaka, uz prethodnu hemijsku pripremu površine i taloženjem međuprevlaka bakra i nikla.