Elektrohemijsko taloženje i karakterizacija legura cink-nikal dobijenih konstantnom i reversnom strujom

Abstract

Zn-Ni alloys electrochemically deposited on steel under various deposition conditions were investigated. The alloys were deposited on a rotating disc electrode and on a steel panel from chloride solutions by direct and reverse current. The influence of reverse plating variables (cathodic and anodic current densities and their time duration) on the composition, phase structure and corrosion properties were investigated. The chemical content and phase composition affect the anticorrosive properties of Zn-Ni alloys during exposure to a corrosive agent (3%NaCl solution). It was shown that the Zn-Ni alloy electrodeposited by reverse current with a full period T = 1 s and r=0.2 exhibits the best corrosion properties of all the investigated alloys deposited by reverse current.Ispitivani su hemijski sastav i fazna struktura legura Zn-Ni dobijenih primenom različitih parametara elektrohemijskog taloženja. Legure su taložene na rotirajućoj disk elektrodi i na čeličnim pločicama konstantnom i reversnom strujom. Ispitivani su parametri reversne struje (katodne i anodne gustine struje taloženja, i njihovog vremena trajanja) na sastav, faznu strukturu i korozione osobine legura. Pokazano je da hemijski sastav i fazna struktura utiču na korozione osobine Zn-Ni legura tokom izlaganja dejstvu rastvora 3%NaCl. Legura Zn-Ni dobijena reversnom strujom sa T=1 s i r=0.2 ima najbolje korozione osobine