Process for galvanic chromium plating
OwnerMarco Santiniinventor
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Abstract
A process for galvanic deposition of chromium coatings is provided in which the base material is subjected to a galvanic chromium plating bath to form a hard chromium coating with beaded or columnar type surface structure, and the beaded or columnar type surface structure is subsequently filled and smoothed with galvanically applied black chromium. The resulting combined coatings yield increased wear resistance, lower friction values, even without lubricants, and increased corrosion resistance.
Claims12
A process for galvanic deposition chromium coatings on a metallic base material, comprising cleaning the base material, exposing the cleaned base material to a galvanic chromium-plating bath to form a hard chromium coating having a hardness of at least 600 HV with beaded surface structure, and galvanically applying a black chromium coating on the hard chromium coating to fill and smooth the beaded surface structure.
Dependencies are inferred from the claim text.