Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for treating and/or coating a substrate with non-chrome materials

Inactive Publication Date: 2010-09-30
PRC DE SOTO INT INC
View PDF12 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]The present invention is also directed to a method for coating a substrate consisting essentially of: (a) applying a caustic cleaner onto at least a portion of the substrate; (b) rinsing at least a portion of the substrate that was subjected to step (a) with water; (c) applying an acid cleaner onto at least a portion of the caustically cleaned substrate; (d) rinsing at least a portion of the substrate that was subjected to step (c) with water; (e) applying a conversion coating comprising zirconium onto at least a portion of the acid cleaned substrate; (f) rinsing at least a portion of the substrate that was subjected to step (e) with water; and (g) applying an electrodepositable coating composition onto at least a portion of the conversion coating, wherein the electrodepositable coating composition comprises a corrosion inhibitor; and wherein the materials used in steps (c), (e), and (g) are substantially free of chrome.

Problems solved by technology

However, due to toxicity concerns associated with hexavalent chrome as well as potential governmental regulations regarding the amount of hexavalent chrome that may be used in a coating, there is a need to reduce and / or eliminate that use of hexavalent chrome in pretreatment and primer coatings that are used in the aerospace industry.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

example i

[0049]2024-T3 bare aluminum panels were cleaned by spraying with a solution of CHEMKLEEN 275, an alkaline cleaner available from PPG Industries, for two minutes at 130° F. After alkaline cleaning, the panels were rinsed thoroughly with deionized water. The panels were then immersed in an acidic solution for two minutes at 120° F. The acid solution was prepared by diluting 198.1 grams of 85% phosphoric acid, 8.5 grams of 70% nitric acid, 16.5 grams of TRITON X-100 (available from The Dow Chemical Company) and 11.1 grams of TRITON CF-10 (available from The Dow Chemical Company) to five gallons of volume with deionized water, and then neutralizing to pH 3.0 with CHEMFIL Buffer (available from PPG Industries). After treatment in the acid solution, the panels were rinsed thoroughly with deionized water and blown dry with a warm air blowoff.

[0050]The panels were then electrocoated in an electrodeposition bath (described below) after the bath was subjected to 50% ultrafiltration. The elect...

example ii

[0054]2024-T3 bare aluminum panels were cleaned by spraying with a solution of CHEMKLEEN 275, an alkaline cleaner available from PPG Industries, for two minutes at 130° F. After alkaline cleaning, the panels were rinsed thoroughly with deionized water. The panels were then immersed in an acidic solution for two minutes at 120° F. The acid solution was prepared by diluting 198.1 grams of 85% phosphoric acid, 8.5 grams of 70% nitric acid, 16.5 grams of TRITON X-100 (available from The Dow Chemical Company) and 11.1 grams of TRITON CF-10 (available from The Dow Chemical Company) to five gallons of volume with deionized water, and then neutralizing to pH 3.0 with CHEMFIL Buffer (available from PPG Industries). After treatment in the acid solution, the panels were rinsed thoroughly with deionized water. The panels were then immersed in a solution of fluorozirconic acid for two minutes at 100° F. The acid bath was prepared by diluting 16.6 grams of 45% fluorozirconic acid to five gallons ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention is directed to a method for coating a substrate comprising: (a) applying a caustic cleaner onto at least a portion of the substrate; (b) rinsing at least a portion of the substrate that was subjected to step (a) with water; (c) applying an acid cleaner onto at least a portion of the caustically cleaned substrate; (d) rinsing at least a portion of the substrate that was subjected to step (c) with water; and (e) applying a conversion coating comprising zirconium onto at least a portion of the acid cleaned substrate; and wherein at least one of the materials used in steps (c) and (e) is substantially chrome free. The present invention is also directed to a substrate, such as an aluminum substrate, that has been coated using the aforementioned method.

Description

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH[0001]This invention was made with Government support under Contract No. FA8650-05-C-5010 awarded by the United States Air Force Research Laboratory. The United States Government may have certain rights in this invention.FIELD OF THE INVENTION[0002]The present invention relates generally to a method for treating and / or coating a substrate with non-chrome materials.BACKGROUND INFORMATION[0003]Conventional pretreatment and primer coating compositions which are used in the aerospace industry contain chrome, such as hexavalent chrome, in order to impart corrosion resistance to the substrate onto which these coatings are deposited. However, due to toxicity concerns associated with hexavalent chrome as well as potential governmental regulations regarding the amount of hexavalent chrome that may be used in a coating, there is a need to reduce and / or eliminate that use of hexavalent chrome in pretreatment and primer coatings that are used in t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23C22/78C23C28/00C22C21/00
CPCC09D5/4442C23G1/22C23G1/125C23C22/78C23G1/00
Inventor KARABIN, RICHARD F.KAYLO, ALAN J.MCMILLEN, MARK W.MILES, MICHELLE S.PEFFER, ROBIN M.RAKIEWICZ, EDWARD F.WILSON, CRAIG A.
Owner PRC DE SOTO INT INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com