Solution composition and method for single-bath post treatment of substrate

Patent metadata

Field	Value
Publication number	US-2018274119-A1
Application number	US-201815994512-A
Country	US
Kind code	A1
Filing date	May 31, 2018
Priority date	Jul 7, 2014
Publication date	Sep 27, 2018
Grant date	—

Abstract

Disclosed is a solution composition which may be used for a single-bath electrochemical passivation and a method using the same. The solution composition includes a metal cation, a metal-oxide anion; and an organic ligand, and optionally includes a non-metallic oxide anion or a polymer. The solution composition may prevent undesired precipitation of metal oxides before performing passivation. In addition, the method of passivation using the solution composition in a single-bath use is also provided.

First claim

1 . A solution composition for a single-bath passivation, comprising:
a metal cation; a metal-oxide anion; and an organic ligand

2 . The solution composition of claim 1 , wherein the metal cation is Ce3+, Y3+, La3+, Pr3+, Sm3+ or mixtures thereof.

3 . The solution compositions of claim 1 , wherein the metal-oxide anion is VO3-, MoO42-, WO42- or mixtures thereof.

4 . The solution composition of claim 1 , wherein the organic ligand forms a complex with the metal cation.

5 . The solution composition of claim 1 , wherein the organic ligand is acetic acid, lactic acid, citric acid, ocalic acid, salicylic acid, tartaric acid, ethylenediaminetetraacetic acid (EDTA), or mixtures thereof.

6 . The solution composition of claim 1 , wherein the solution composition further comprises a non-metallic oxide anion.

7 . The solution composition of claim 6 , wherein the non-metallic oxide anion is PO43-, SiO3-, B2O42- or mixtures thereof.

8 . The solution composition of claim 1 further comprises a polymer.

9 . The solution composition of claim 8 , the polymer is polyacrylic acid, polyol, polyethylene glycol, or mixtures thereof.

10 . The solution composition of claim 1 , wherein pH of the solution composition is in a range of about pH 7.0 to about pH 11.0.

11 - 19 . (canceled)

20 . An article manufactured by a method of single-bath passivation post-treatment, comprising:
preparing a solution composition; applying the solution composition to a substrate; applying an electric current to the substrate to perform an electrode deposition; wherein the solution composition comprises: a metal cation; a metal-oxide anion; an organic ligand; a non-metallic oxide anion; and a polymer.

Assignees

• United Technologies Corp

Inventors

• Zhang Weilong
• Kryzman Michael A

Classifications

• C09K15/06

  containing oxygen · CPC title

• C25D13/06

  with polymers {(not used, see C09D5/44)} · CPC title

• C09D5/084

  Inorganic compounds · CPC title

• C25D9/12

  on light metals · CPC title

• C25D9/08

  by cathodic processes · CPC title