Multilayer, corrosion-resistant finish and method
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United States of America Patent
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Dec 5, 2006
Issued Date -
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app pub date -
Jul 12, 2004
filing date -
Jul 12, 2004
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Abstract
The present invention provides a black, chrome-free, multilayer corrosion protection finish designed to meet extended corrosion properties. This corrosion-resistant finish is engineered to meet a minimum of 500 salt spray testing hours to white corrosion, and 1500 salt spray testing hours to red corrosion when tested to ASTM B117 standards. It is also designed to comply with the European Union Directive on End of Life Vehicles. This multilayer system is designed for use on automotive body sheet steel, automotive underbody parts, automotive under-hood parts, and some automotive interior parts specifying a gloss requirement greater than 4. This chrome-free, multilayer finish is a combination of a zinc-iron electroplated substrate, a non-electrolytic phosphate crystal conversion layer using orthophosphoric acid, and a Xylan/Teflon fluorocarbon sealer coating to form a three layer total corrosion protection system.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
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Inventor Name | Address | # of filed Patents | Total Citations |
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Thomae, Kurt J | Elk Grove Village, IL | 1 | 0 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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