Atmospheric Corrosion of Electroplates in Sea Climate: Protective-Decorative Functions and Service Life of Plates

This work finishes, sums up, and systematically generalizes the results of eleven papers (which were published in this journal starting from 1996) dealing with the corrosion behavior of all main classes of electroplates on carbon steel 10 and Ð>62 brass, which are used in ship instrument engineering. The electroplates were tested for 14 to 20 years in marine atmosphere in containers simulating watertight and splashproof casings of ship instruments in cold (Murmansk), moderate humid (Vladivostok), and subtropical humid (Batumi) climate. The protective and decorative characteristics are tabulated for periods of 1, 5, 10, and 20 years and cover both monolayer metal or alloy coatings (Zn, Cd, Cd-20Sn, Ni, Cr, Sn-40Pb, Sn-1Bi, Ag, Au, and Pd) and multilayer coatings (Cu/Ni, Cu/Ni/Cr, Cu/(Sn-40Pb), Cu/(Sn-1Bi), Ag/Au, and Ag/Pd), including phosphated, chromated, hydrophobized, and lacquered coatings. The data on the summary gain in weight, the pure corrosion weight loss, and the weight of the products retained by the specimens are also generalized, as well as the service lives of the coatings according to the Branch Standard (OST) 5-9246-75 and State Standards (GOSTs) 9.012-73 and 9-311-87.[PUBLICATION ABSTRACT]