 Molded articles of improved impact resistance and compositions therefor |
| We claim: 1. A thermoplastic molding composition comprising: (i) a poly(butylene terephthalate) ... |
|
| Adjustable mount for electrostatic printer stylus within cylindrical printing roller |
| What is claimed is: 1. An electrostatic printer, comprising a rotatable, cylindrical printing ... |
|
| Apparatus with multiple heads adjusted for optimum performance at different regions of optical disk |
| It is an object of the invention to provide an optical disk apparatus without the above-described ... |
|
| Thermal recording elements |
| OF THE INVENTION As the support used in this invention any of a wide variety of supports, ... |
|
| Erasable recording medium comprising a dimer acid polyamide resin |
| OF THE PREFERRED EMBODIMENTS The polymers employed in the erasable recording medium of the present ... |
|
| Communication method and apparatus |
| Accordingly, the present invention attains this object with the following arrangement. Namely, a ... |
|
| Process for the manufacture of stabilized polyester-polycarbonate copolymers |
| What we claim is: 1. An improved process for the manufacture of thermoplastic polyesters containing ... |
|
| Antioxidant comprising a hydroxy aromatic compound containing sulfur and an organic phosphonate |
| I claim: 1. An antioxidant composition suitable for use with polymers subject to oxidative ... |
|
|
Corrosion-resistant coated copper metal and method for making the same
| Details |
Inventors: Carey, II, Jay F.; Zamanzadeh, Mehrooz; Hesske, Nicholas R.;
Assignee: The Louis Berkman Company (Steubenville, OH)
Primary Examiner: Zimmerman; John J.
Assistant Examiner:
Attorney, Agent or Firm: Vickers, Daniels & Young
A corrosion-resistant coated copper metal coated with an alloy of tin wherein the tin content constitutes a majority of the alloy. The tin alloy may also include one or more metal additives to improve the coating process and/or to alter the properties of the tin alloy. A metal layer may be applied to the surface of the copper metal prior to applying the tin alloy. The copper material may be pre-treated prior to coating to remove surface oxides. The coating of the tin alloy involves heat to thereby form a heat created intermetallic layer. The coated copper metal can be subsequently treated with a passivation solution to remove the coated tin alloy and expose the intermetallic layer. The intermetallic layer includes copper and tin and exhibits excellent corrosion resistant properties. |
|
DETAILED DESCRIPTION The present invention relates to a product and method of producing a corrosion-resistant, environmentally friendly metal material.
More specifically, the invention relates to the product and method of producing a corrosion resistant copper material.
Even more specifically, the invention relates to the coating of a copper base metal, such as a copper metal strip, with a tin alloy to form a corrosive-resistant barrier on the copper metal and subsequently removing the tin alloy to expose a corrosion-resistant, heat created intermetallic layer.
In accordance with the principal feature of the invention, there is provided a base metal made substantially of copper, i.
e.
over 50% copper, which is coated with a corrosion-resistant metal alloy.
The metal alloy is an alloy primarily of tin.
In accordance with another aspect of the present invention, the copper base metal is coated with an intermediate metal layer prior to the tin alloy being coated onto the copper base metal.
Preferably, the copper base metal is plated, plated and subsequently flow heated, metal sprayed or hot dipped with the intermediate metal layer.
The intermediate metal layer provides additional corrosion resistance to the copper base material, especially against halogens such as chlorine.
The intermediate metal layer preferably is tin, nickel, copper or chromium.
Other metals such as aluminum, cobalt, molybdenum, Sn--Ni or Fe--Ni can be used.
The intermediate metal layer is applied to the copper base metal to form a very thin metal layer.
Although the tin alloy coating provides excellent protection against most corrosion-producing elements and compounds, the inclusion of the intermediate metal layer enhances the bonding and/or corrosion resistant characteristics of the tin alloy.
The intermediate metal layer can also be applied to alter the composition of the heat created intermetallic layer which is formed between the copper base metal and tin alloy.
If used, the nickel is preferably flashed or plated to the copper surface
|
| Related patents |
|
|
Process for the production of a coated copper alloy
The present invention has been accomplished to solve the above-mentioned problems, and provides a copper alloy and a process for the production thereof. The process of ...
|
|
|
Copper foil for printed wiring board having excellent chemical resistance and heat resistance
The copper foil for a printed wiring board according to the invention comprises a copper foil, an alloy layer (A) comprising copper, zinc, tin and nickel which is formed ...
|
|
|
Process for the non-galvanic tin plating of copper or copper alloys
What is claimed is: 1. A bath for non-galvanic plating of a tin layer onto a copper or copper alloy base layer, the bath comprising: a tin-containing electrolyte; an ...
|
|
|
Ink jet printer
What is claimed is: 1. An ink jet printer, comprising at least one nozzle which is connected, via a pressure chamber, to an ink supply duct, said pressure chamber ...
|
|
|
Anthraquinone-bis-amidines and process for preparing them
We claim: 1. An anthraquinone-bis-amidine of the formula: ##STR10## in which R.sup.1, R.sup.2 and R.sup.3 may be identical or different from each other and each ...
|
|
|
Pad dyeing process for wool
What is claimed is: 1. A pad cold batch process for dyeing wool with reactive dyes, which comprises padding the fiber material at a pH value between 7 and 9 with aqueous ...
|
|
|
Organofunctional silane coupling agent-powder mixtures
What is claimed is: 1. A powder silane mixture in which the silane comprises 40 to about 80 weight percent of the mixture, the remainder is the powder, wherein the ...
|
|
|
Backup electrode for an electrostatic recorder
What is claimed is: 1. An electrostatic recorder for forming an electrostatic image on a recording medium interposed between an array of backup electrodes positioned in ...
|
|
|
Polyetherimide composites
What I claim as new and desire to secure by Letters Patent of the United States is: 1. Polyetherimie-carbon fiber composites comprising, A. from 40% to 85% by weight of ...
|
|
|
Thermoplastic moulding compositions
We claim: 1. A thermoplastic molding composition comprising i. from 5 to 95 percent by weight of at least one polycarbonate derived from a divalent phenol and ii. from 95...
|
|
|
Manufacturing Materials 
