FIELD: metallurgy.
SUBSTANCE: multi-coated element includes a substrate, pre-treatment coating layer that has a layer of chemical nickel plating and a nickel layer and applied to the entire substrate, where there is formed a coppering layer and a functional layer, formed on the coppering layer, while the functional layer has a nickel layer with low potential, which includes one of the following: a layer of high sulfur nickel and a nickel layer with micro-cracks or an integrated cover layer from the layer of high sulfur nickel with a layer with micro-cracks, and a microporous nickel layer formed on the layer of nickel with low potential.
EFFECT: significant increase in corrosion resistance and stability of the entire element, providing good uniform gloss and coating layers bonding effect.
14 cl, 24 tbl, 19 dwg
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