Method of using a metal substrate of improved surface morphology
Patent 5366598 Issued on November 22, 1994. Estimated Expiration Date: 
October 7, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 7, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of selective electroplating and products produced thereby Preparation and use of electrodes in the electrolysis of alkali halides Patent #: 4572770 InventorsAssigneeApplicationNo. 132975 filed on 10/07/1993US Classes:205/532, Laminated or coated205/554, Sulfur containing compound produced205/630Utilizing specified electrodeExaminersPrimary: Gorgos, KathrynAttorney, Agent or FirmInternational ClassesC25B 001/04C25B 001/16 C25B 001/00 AbstractA metal surface is now described having enhanced adhesion of subsequently applied coatings. The substrate metal of the article, such as a valve metal as represented by titanium, is provided with a highly desirable surface characteristic for subsequent coating application. This can be initiated by selection of a metal of desirable metallurgy and heat history, including prior heat treatment to provide surface grain boundaries which may be most readily etched. In subsequent etching operation, the surface is made to exhibit well defined, three dimensional grains with deep grain boundaries. Subsequently applied coatings, by penetrating into the etched intergranular valleys, are desirably locked onto the metal substrate surface and provide enhanced lifetime even in rugged commercial environments.Other References
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