FIELD: metallurgy.
SUBSTANCE: proposed method comprises processing of substrate surface by degreasing and application of sandwiched metal-based coating. Note here that coating first layer is nickel. Note here that after application of the first 10-12 mcm thick layer it is activated in acid medium. Then, copper 12-15 mcm thick layer is applied. Then, diffusion annealing is performed at 960-980°C for 17-23 min. Thereafter, copper layer is applied in acid medium. Now, silver 8-12 mcm deep layer is applied and subjected to diffusion annealing at 740-760°C for 27-30 min.
EFFECT: higher rust resistance.
2 dwg
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