Electroplating of silver onto aluminum and its alloys

Abstract

In this paper the structural characteristics of silver coatings electrodeposited as final coatings onto aluminum were shown. 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 electrodepositing of basic copper coating on the structure of the final silver coatings was investigated. Structural characteristics of basic copper coatings and final silver coatings were examined with scanning electron microscopy (SEM). Silver coatings can be successfully electrodeposited as a final coating onto aluminum with nickel and copper inter coatings.

U ovom radu su prikazani morfologija i strukturne karakteristike elektrohemijski istaloženih prevlaka srebra, kao završnih prevlaka, na aluminiju i njegovim legurama. Bakarna prevlaka je elektrohemijski taložena neposredno na aluminijum kao osnovna prevlaka. Nakon toga, prevlaka nikla i prevlaka bakra iz kiselog kupatila je takođe elektrohemijski taložena. Na ovaj sistem prevlaka taložena je prevlaka srebra. U radu je takođe je ispitivan uticaj fluorida и elektrolitu za direktno taloženje prevlaka bakra na strukturu završne prevlake srebra. Morfologija i strukturne karakteristike istaloženih prevlaka su ispitivane skenirajućom elektronskom mikroskopijom (SEM). Pokazano je da se srebrne prevlake mogu uspešno nanositi kao završne prevlake na aluminijum i njegove legure sa međuprevlakama bakra i nikla.