REPLENISHING COMPOSITIONS AND METHODS OF REPLENISHING PRETREATMENT COMPOSITIONS

• US 20110083580A1
• Filed: 10/08/2009
• Published: 04/14/2011
• Est. Priority Date: 10/08/2009
• Status: Active Grant

• Current Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: DeChant, James A., Fotinos, Nicephoros A., McMillen, Mark, Raney, David A., Cheng, Shan, Rakiewicz, Edward F.
• Granted Patent: US 8,951,362 B2
• Time in Patent Office: Days
• US Class Current: 106/14.05
• CPC Class Codes: C23C 22/34 containing fluorides or complex fluorides
• CPC Class Codes: C23C 22/86 Regeneration of coating baths

Abstract

Disclosed are replenisher compositions and methods of replenishing pretreatment compositions. The methods include adding a replenisher composition to a pretreatment composition wherein the replenisher composition includes: (a) a dissolved complex metal fluoride ion wherein the metal ion comprises a Group IIIA metal, Group IVA metal, Group IVB metal, or combinations thereof; (b) a component comprising an oxide, hydroxide, or carbonate of Group IIIA, Group IVA, Group IVB metals, or combinations thereof; and optionally (c) a dissolved metal ion comprising a Group IB metal, Group IIB metal, Group VIIB metal, Group VIII metal, Lanthanide Series metal, or combinations thereof.

Claims

1. A method of replenishing a pretreatment composition comprising:

adding a replenisher composition to the pretreatment composition, wherein the replenisher composition comprises;

(a) a dissolved complex metal fluoride ion wherein the metal ion comprises a Group IIIA metal, Group IVA metal, Group IVB metal, or combinations thereof; and

(b) a component comprising an oxide, hydroxide, carbonate of Group IIIA metals, Group IVA metals, Group IVB metals, or combinations thereof.

2. The method of claim 1, wherein the replenisher composition further comprises (c) a dissolved metal ion comprising a Group IB metal, Group IIB metal, Group VIIB metal, Group VIII metal, Lanthanide Series metal, or combinations thereof.

3. The method of claim 1, wherein at least 8 percent by weight of total metal ions of components (a) and (b) present in the replenisher composition are provided by component (b).

4. The method of claim 1, wherein component (a) of the replenisher composition comprises H₂TiF₆, H₂ZrF₆, H₂HfF₆, H₂SiF₆, H₂GeF₆, H₂SnF₆, or combinations thereof.

5. The method of claim 1, wherein the metal of component (b) comprises titanium, zirconium, hafnium, aluminum, silicon, germanium, tin, or combinations thereof.

6. The method of claim 1, wherein component (b) comprises zirconium basic carbonate, aluminum hydroxide, tin oxide, silicon hydroxide, or combinations thereof.

7. The method of claim 2, wherein the dissolved metal ion of component (c) comprises manganese, cerium, cobalt, copper, zinc, or combinations thereof.

8. The method of claim 1, wherein component (a) is present in the replenisher composition in an amount ranging from 10 to 92 percent by weight metal ions based on weight of total metal ions of components (a) and (b) of the replenisher composition.

9. The method of claim 3, wherein component (b) is present in the replenisher composition in an amount ranging from 8 to 90 percent by weight metal ions based on weight of total metal ions of components (a) and (b) of the replenisher composition.

10. The method of claim 2, wherein component (c) is present in the replenisher composition at a weight ratio of 1:

10 to 10;

1 based on weight of total metal ions of components (a) and (b) to weight of total metal ions of component (c).

11. The method of claim 1, wherein the pretreatment composition comprises:

water and (i) a dissolved complex metal fluoride ion wherein the metal ion comprises a Group IIIA metal, Group IVA metal, Group IVB metal, Group VB metal, or combinations thereof.

12. The method of claim 1, wherein the pretreatment composition comprises:

(i) a dissolved complex metal fluoride ion wherein the metal ion comprises a Group IIIA metal, Group IVA metal, Group IVB metal, Group VB metal, or combinations thereof;

(ii) a dissolved metal ion comprising a Group IB metal, Group IIB metal, Group VIIB metal, Group VIII metal, Lanthanide Series metal, or combinations thereof; and

water.

13. The method of claim 11, wherein the dissolved complex metal fluoride ion (i) of the pretreatment composition is the same as the dissolved complex metal fluoride ion (a) of the replenisher composition.

14. The method of claim 11, wherein the replenisher composition is added at an amount sufficient to maintain a concentration of metal ions from the dissolved complex metal fluoride ion (i) of the pretreatment composition from 10 ppm to 250 ppm metal ions.

15. The method of claim 12, wherein the dissolved metal ion (ii) of the pretreatment composition is the same as the dissolved metal ion (c) of the replenisher composition.

16. The method of claim 11, wherein the metal ion of the dissolved complex metal fluoride ion (i) of the pretreatment composition comprises titanium, zirconium, hafnium, silicon, germanium, tin, or combinations thereof.

17. The method of claim 12, wherein the dissolved metal ion (ii) of the pretreatment composition comprises manganese, cerium, cobalt, copper, zinc, or combinations thereof.

18. A method of replenishing a pretreatment composition comprising:

adding a replenisher composition to the pretreatment composition, wherein the replenisher composition comprises;

(a) a component comprising H₂TiF₆, H₂ZrF₆, H₂HfF₆, H₂SiF₆, H₂GeF₆, H₂SnF₆, or combinations thereof; and

(b) a component comprising an oxide, hydroxide, or carbonate of titanium, zirconium, hafnium, aluminum, silicon, germanium, tin, or combinations thereof.

19. The method of claim 18, wherein the replenisher composition further comprises:

(c) a dissolved metal ion comprising manganese, cerium, cobalt, copper, zinc, or combinations thereof.

20. The method of claim 18, wherein the pretreatment composition comprises:

(i) a dissolved complex metal fluoride ion wherein the metal ion comprises a Group IIIA metal, Group IVA metal, Group IVB metal, Group VB metal, or combinations thereof; and

water.

21. The method of claim 19, wherein the pretreatment composition comprises:

(i) a dissolved complex metal fluoride ion wherein the metal ion comprises a Group IIIA metal, Group IVA metal, Group IVB metal, Group VB metal, or combinations thereof;

(ii) a dissolved metal ion comprising a Group IB metal, Group IIB metal, Group VIIB metal, Group VIII metal, Lanthanide Series metal, or combinations thereof; and

water.