STRUCTURAL MULTI-LAYER COBALT COATINGS FOR POLYMER ARTICLES

摘要

Corrosion resistant, grain-refined and/or amorphous Ni- and Cu-free Co-bearing coatings on polymer substrates for use in human contact applications, including industrial products, automotive products, medical surgical devices, and medical products, are disclosed.

主权项

1. An article comprising:
(i) a polymer substrate material; and (ii) at least one metallic layer and/or patch on at least part of an outer surface of said polymer substrate material or on an intermediate structure thereon, said at least one metallic layer or patch being substantially free of Cu and Ni and comprising at least 50% per weight of Co, 0 to 35% per weight of chromium, 0 to 25% per weight of tungsten, 0 to 25% per weight of phosphorus, 0 to 25% per weight of molybdenum, and 0 to 5% per weight of boron, and said at least one metallic layer or patch having a microstructure which is fine-grained with an average grain size between 2 and 5,000 nm and/or amorphous; (iii) wherein said article is with or without an intermediate structure between said substrate material and the at least one metallic layer and/or patch comprising Co, said intermediate structure comprising Co and being substantially free of Cu and Ni with a layer thickness of less than 5 microns; and wherein said article is configured to surpass 6 hours without failure on the ASTM B368 CASS Test.