Anti-corrosion and/or passivation compositions for metal-containing substrates and methods for making, enhancing, and applying the same

Patent metadata

Field	Value
Publication number	US-11149353-B2
Application number	US-201916582058-A
Country	US
Kind code	B2
Filing date	Sep 25, 2019
Priority date	Oct 7, 2016
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A method of disposing a corrosion resistant system to a substrate may comprise applying a plating material to the substrate; forming a chemical conversion coating solution by combining a solvent, at least one corrosion inhibitive cation comprising at least one of zinc, calcium, strontium, magnesium, or aluminum, at least one corrosion inhibitive anion comprising at least one of phosphate, molybdate, or silicate, and a complexing agent; and applying the chemical conversion coating solution to the plating material on the substrate.

First claim

What is claimed is:

1. A corrosion inhibition system disposed on a substrate, comprising:
a plating material;
a chemical conversion coating disposed on the plating material, the chemical conversion coating comprising a corrosion inhibitive cation comprising at least one of zinc, calcium, strontium or aluminum, a corrosion inhibitive anion comprising at least one of phosphate, molybdate, or silicate, and a complexing agent; and
a corrosion inhibition composition disposed on the chemical conversion coating, the corrosion inhibition composition comprising a zinc oxide, a zinc phosphate, a calcium silicate, an aluminum phosphate, a zinc calcium strontium aluminum orthophosphate silicate hydrate, a molybdate compound, and a silicate compound.

2. The corrosion inhibition system of claim 1 , wherein:
the corrosion inhibitive cation is provided by at least one of zinc chloride, zinc sulfate, zinc nitrate, zinc molybdate, calcium molybdate, magnesium molybdate, zinc silicate, magnesium silicate, calcium silicate, zinc oxide, zinc phosphate, aluminum phosphate, magnesium phosphate, calcium phosphate, zinc calcium strontium aluminum orthophosphate silicate, calcium chloride, calcium sulfate, calcium nitrate, strontium chloride, strontium sulfate, strontium nitrate, aluminum chloride, aluminum sulfate, or aluminum nitrate; and
the corrosion inhibitive anion is provided by at least one of sodium phosphate, sodium silicate, sodium vanadate, zinc molybdate, calcium molybdate, sodium molybdate, magnesium molybdate, zinc silicate, magnesium silicate, calcium silicate, sodium silicate, zinc phosphate, magnesium phosphate, calcium phosphate, aluminum phosphate, zinc calcium strontium aluminum orthophosphate silicate, sodium nitrite, phosphoric acid, silicic acid, vanadic acid, and/or molybdic acid.

3. A method of disposing a corrosion resistant system to a substrate, comprising:
applying a plating material to the substrate;
forming a chemical conversion coating solution by combining a solvent, at least one corrosion inhibitive cation comprising at least one of zinc, calcium, strontium, magnesium or aluminum, at least one corrosion inhibitive anion comprising at least one of phosphate, molybdate, or silicate, and a complexing agent, wherein the molybdate has a concentration in a range of 0.5×10 −3 molar to 0.02 molar in the chemical conversion coating solution;
applying the chemical conversion coating solution to the plating material on the substrate;
drying the chemical conversion coating solution to form a chemical conversion coating, wherein the chemical conversion coating comprises the at least one corrosion inhibitive cation comprising at least one of zinc, calcium, strontium, magnesium or aluminum, the at least one corrosion inhibitive anion comprising at least one of phosphate, molybdate, or silicate, and the complexing agent; and
applying a corrosion resistant coating to the chemical conversion coating, wherein the corrosion resistant coating comprises a corrosion inhibition composition and an application vehicle, and
wherein the corrosion inhibition composition comprises a zinc oxide, a zinc phosphate, a calcium silicate, an aluminum phosphate, a zinc calcium strontium aluminum orthophosphate silicate hydrate, a molybdate compound, and a silicate compound.

4. A method of disposing a corrosion resistant system to a substrate, comprising:
applying a plating material to the substrate;
forming a chemical conversion coating solution by combining a solvent, at least one corrosion inhibitive cation comprising at least one of zinc, calcium, strontium, magnesium or aluminum, at least one corrosion inhibitive anion comprising at least one of phosphate, molybdate, or silicate, and a complexing agent;
applying the chemical conversion coating solution to the plating material on the substrate;
drying the chemical conversion coating solution to form a chemical conversion coating, wherein the chemical conversion coating comprises the at least one corrosion inhibitive cation comprising at least one of zinc, calcium, strontium, magnesium or aluminum, the at least one corrosion inhibitive anion comprising at least one of phosphate, molybdate, or silicate, and the complexing agent; and
applying a corrosion resistant coating to the chemical conversion coating, wherein the corrosion resistant coating comprises a corrosion inhibition composition and an application vehicle, and
wherein the corrosion inhibition composition comprises a zinc oxide, a zinc phosphate, a calcium silicate, an aluminum phosphate, a zinc calcium strontium aluminum orthophosphate silicate hydrate, a molybdate compound, and a silicate compound, wherein the molybdate compound comprises between 10% and 90% by weight of the corrosion inhibition composition.

Assignees

• Goodrich Corp

Inventors

• Kryzman Michael A
• Zafiris Georgios S
• Jaworowski Mark R
• Zhang Weilong
• Panza-Giosa Roque
• Manzini Marilea

Classifications

• C09D5/084 Primary

  Inorganic compounds · CPC title

• C25D3/26

  of cadmium · CPC title

• C23F11/173

  Macromolecular compounds · CPC title

• C23F11/08 Primary

  in other liquids · CPC title

• C23C22/05

  using aqueous solutions · CPC title