Vacuum impregnation of anodic oxidation coating (AOC) treated surfaces on valve metal substrates

Inactive Publication Date: 2021-06-17
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0049]Accordingly, the current technology provides a method of filling the pores of oxide layers to prevent, inhibit, or minimize corrosion formation by bl

Problems solved by technology

However, valve metals corrode under a variety of condit

Method used

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  • Vacuum impregnation of anodic oxidation coating (AOC) treated surfaces on valve metal substrates
  • Vacuum impregnation of anodic oxidation coating (AOC) treated surfaces on valve metal substrates
  • Vacuum impregnation of anodic oxidation coating (AOC) treated surfaces on valve metal substrates

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Embodiment Construction

[0039]Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific compositions, components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

[0040]The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms “a,”“an,” and “the” may be intended to include the plural forms as well, unless the context clearly indicates...

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Abstract

A corrosion-resistant workpiece is provided. The corrosion-resistant workpiece includes a matrix including a valve metal or an alloy including a valve metal; an oxide layer formed on the matrix, the oxide layer including a plurality of pores, wherein each pore of the plurality has a pore volume; and a polymeric composition disposed within at least a portion of the plurality of pores, wherein greater than or equal to about 70% of the pore volume for each pore having the polymeric composition disposed therein is filled with the polymeric composition. A method of fabricating the corrosion-resistant workpiece is also provided.

Description

INTRODUCTION[0001]This section provides background information related to the present disclosure which is not necessarily prior art.[0002]Valve metals and their alloys are increasingly used in aerospace and automotive applications because of their light weight and high strength. However, valve metals corrode under a variety of conditions, including in the presence of humid air and water. Such corrosion is exacerbated in the presence of various salts and other known corrosive agents. Even though some surface protection is afforded by forming oxide layers on valve metals by microarc oxidation (MAO) coating, the oxide layers have a high porosity, which enables humid air and / or water to infiltrate the oxide layer and contact the valve metal surface. Accordingly, methods of providing corrosion-resistance to workpieces comprising a valve metal are desired.SUMMARY[0003]This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all ...

Claims

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Application Information

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IPC IPC(8): C25D11/24C23C18/12
CPCC25D11/246C23C22/83C23C18/122C25D11/30C25D11/26C25D11/34C25D11/026C23C28/345C23C28/00C23C18/125
InventorSONTA, KESTUTIS A.HAN, SU JUNG
OwnerGM GLOBAL TECH OPERATIONS LLC