Corrosion and abrasion resistant decorative coating
a corrosion and abrasion resistant, decorative coating technology, applied in the application, superimposed coating process, weaving and other directions of can solve the problems of not performing acceptable corrosion testing, the color range of non-brass decorative pvd, and the insufficient condition of zirconium or hafnium as the sole metallic species in the decorative layer at the surface, etc., to achieve the effect of enhancing corrosion resistan
Inactive Publication Date: 2007-04-12
MOEN INC
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Benefits of technology
The present invention is about creating articles with a decorative coating that is resistant to corrosion, abrasion, and chemical attacks. The invention provides a new article with a specified decorative color that includes a thin outer transition layer with a systematic variation in composition. Additionally, the invention allows for different colors to be achieved through the use of a physical vapor deposition process. The invention also enhances corrosion resistance in articles such as door hardware, faucets, and plumbing components. The invention provides a corrosion-resistant article with an exterior transition layer that has both corrosion protection and determines the visible color of the article.
Problems solved by technology
Still more recently, it has been determined that the presence of zirconium or hafnium as the sole metallic species in the decorative layer at the surface is not a sufficient condition to insure that the corrosion resistance of the coated article is not degraded.
Some non-brass decorative PVD colors, and specifically the range of copper tones, still do not perform acceptably in corrosion testing even when zirconium is substantially the only metal in the PVD layer at the surface.
Method used
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Embodiment Construction
[0012] Many household objects, for example faucets and related plumbing products, include components which are designed to have both decorative and functional aspects. Frequently, such components consist first of a substrate, which establishes the shape and mechanical function, and second, of a finish which provides the decorative aspect of the article, resistance to corrosion or tarnish, resistance to chemical attack, resistance to abrasion or impact, or a combination of these enhancements. Usually the finish consists of a stack of one or more layers of material which are thin relative to the dimensions of the substrate. A finishing process consists generally of the steps necessary to apply the layers, plus some other intermediate steps in which the surface is cleaned or the surface texture or chemical properties are altered by physical or chemical means.
[0013] Until approximately 1980 the most well established decorative finishing processes were electroplating and painting with l...
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Abstract
A new article of manufacture, for example a faucet or other article of hardware, has a specified decorative color, and is resistant to corrosion, abrasion and attack by chemicals. The article includes a substrate, one or more corrosion resistant layers applied to the substrate, a thin transition layer having a composition that varies systematically from a first composition to a second composition and in which the first composition has, at least in part, the function of corrosion protection, and in which the second composition determines the visible color or that portion of the substrate to which the transition layer is applied.
Description
THE FIELD OF THE INVENTION [0001] The present invention relates to decorative coatings for articles of manufacture such as faucets and related plumbing products including shower heads, escutcheons, tub spouts and the like. More specifically, the invention concerns a decorative coating for such a product, which is resistant to corrosion, abrasion and attack by chemicals. The invention is particularly concerned with such a decorative coating which resists corrosion, a common problem in many present day decorative coatings. There are numerous prior art patents which disclose the use of zirconium to provide a corrosion resistant brass appearing decorative coating. More recently, it has been determined that decorative layers applied by physical vapor deposition (PVD) processes, and containing zirconium or hafnium as the only metallic species, are unusually and advantageously compared with the decorative layers containing other metals because normally they do not degrade the corrosion res...
Claims
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IPC IPC(8): B32B15/01C25D5/24F16L58/08C23C14/00C23C14/06C23C14/16C23C28/00C23C28/02C23C30/00
CPCC23C14/0015Y10T428/12875C23C14/06C23C14/165C23C28/023C23C30/00Y10S428/938C23C28/021Y10T428/12458Y10T428/12979Y10T428/12535Y10T428/12896Y10T428/12868Y10T428/12847Y10T428/12576Y10T428/12882Y10T428/12806C23C14/0084Y10T442/2344
Inventor SHEEK, JAMES G.GREMBOWICZ, JAREKSONG, INHOO'BRIEN, TIMOTHY J.
Owner MOEN INC