Process for coating workpieces with bearing metal
AssigneeDuralloy AG
InventorMarco Santini
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Abstract
A process is provided for coating metallic workpieces with a bearing material, wherein the workpiece first receives a hard chromium plating having a pearl or columnar structure type surface. A predominantly silver layer is then galvanically deposited, which fills in and smooths the pearl or columnar structure type surface of the hard chromium plating. Optionally, additional hard chromium platings and predominantly silver-containing layers may be applied, preferably galvanically. The predominantly silver layer may advantageously contain a graphite component.
Claims18
A process for coating a metallic workpiece with a bearing material, comprising cleaning the workpiece, optionally activating the workpiece, then exposing the workpiece to a galvanic chrome plating bath to form on the workpiece a hard chromium plating having a hardness of at least about 600 HV and a pearl or columnar structure type surface, and filling in and smoothing the pearl or columnar structure type surface with a galvanically applied layer, wherein the galvanically applied layer comprises at least predominantly silver.
Dependencies are inferred from the claim text.