Patent
Passive coatings for bulk aluminum and powder pigments
| العنوان: | Passive coatings for bulk aluminum and powder pigments |
|---|---|
| Patent Number: | 10662,338 |
| تاريخ النشر: | May 26, 2020 |
| Appl. No: | 16/123605 |
| Application Filed: | September 06, 2018 |
| مستخلص: | Composition and process for preparing corrosion-resistant passive coatings on bulk-aluminum alloys and aluminum powder-pigments; said coatings derived from an acidic aqueous composition consisting essentially of potassium hexafluorozirconate, basic chromium sulfate and potassium tetrafluoroborate. |
| Inventors: | Matzdorf, Craig (Hollywood, MD, US); Walles, Joshua (California, MD, US); Thompson, Kaitlyn (San Diego, CA, US) |
| Assignees: | The United States of America as represented by the secretary of the Navy (Washington, DC, US) |
| Claim: | 1. Process for preparing passive coatings on bulk-aluminum alloys and aluminum-powder pigments having a micro size ranging from about 2.8 to 4.0 microns which comprises coating said aluminum alloys and powder-pigments with an acidic aqueous composition having a pH of about 3.8 at temperatures ranging from about 120° F. to 150° F.; said aqueous composition consisting essentially of from about, in parts by weight per liter of water, 35 grams per liter of potassium hexafluorozirconate, 46 grams per liter of basic chromium sulfate and from 0.0 to 1.5 grams per liter of potassium tetrafluoroborate. |
| Claim: | 2. Process for preparing passive coatings on bulk-aluminum alloys and aluminum-powder pigments having a micro size ranging from about 2.8 to 4.0 microns which comprises coating said aluminum alloys and powder-pigments with an acidic aqueous composition having a pH of about 2.8 to 4.0 and at temperatures ranging from about 120° F. to 200° F.; said aqueous composition consisting essentially of about, in parts by weight per liter of water, 20 grams per liter of potassium hexafluorozirconate, 15 grams per liter of basic chromium sulfate and 1.0 grams per liter of potassium tetrafluoroborate. |
| Claim: | 3. Process for preparing passive coatings on bulk-aluminum alloys and aluminum-powder pigments having a micro size ranging from about 2.8 to 4.0 microns which comprises coating said aluminum alloys and powder-pigments with an acidic aqueous composition having a pH from about 3.8 at temperatures ranging from about 120° F. to 200° F.; said aqueous compositions consisting essentially of about, in parts by weight per liter of water, 35 grams per liter parts of potassium hexafluorozirconate, 46 grams per liter of basic chromium sulfate and 0.0 to 1.5 grams per liter of potassium tetrafluoroborate. |
| Claim: | 4. Process for preparing passive coatings on bulk-aluminum alloys and aluminum-powder pigments having a micro size ranging from about 2.8 to 4.0 microns which comprises coating said aluminum alloys and powder-pigments with an acidic aqueous composition having a pH from about 2.8 to 4.0 at temperatures ranging from about 120° F. to 200° F.; said aqueous composition consisting essentially of about, in parts by weight per liter of water, 20 grams per liter of potassium hexafluorozirconate, 15 grams per liter of basic chromium sulfate and 1.0 grams per liter of potassium tetrafluoroborate. |
| Patent References Cited: | 5336303 August 1994 Cocks 6375726 April 2002 Matzdorf 6511532 January 2003 Matzdorf 6521029 February 2003 Matzdorf 6663700 December 2003 Matzdorf 6669764 December 2003 Matzdorf 8277688 October 2012 Matzdorf 9243150 January 2016 Matzdorf et al. 2013/0168612 July 2013 Matzdorf et al. 2014/0084221 March 2014 Matzdorf et al. 2018/0216234 August 2018 Westre et al. |
| Primary Examiner: | Green, Anthony J |
| Attorney, Agent or Firm: | Glut, Mark O. NAWCAD |
| رقم الانضمام: | edspgr.10662338 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |