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Corrosion Resistant Adhesive Sol-Gel

A sol and gel technology, which is applied in the direction of aircraft fire protection/anti-corrosion, anti-corrosion coatings, liquid chemical plating, etc., can solve the problems of reducing the adhesion ability of sol-gel films, corrosion inhibitors, etc.

Active Publication Date: 2022-04-19
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, corrosion inhibitors have been added to sol-gel films (or included in the formulation of sol-gel films), but it has been found that when present in sol-gel films, these inhibitors reduce the sol-gel Both the adhesion ability of the film and the corrosion resistance ability of the corrosion inhibitor

Method used

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Examples

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Embodiment

[0072] Experimental Materials: Inhibicor 1000 (IC-1000) was obtained from Wayne pigment corporation. Obtain a 3% AC-131 kit from 3M. 3% AC-131 is a non-chromate conversion coating for aluminum, nickel, stainless steel, magnesium and titanium alloys. As used herein, the combination of (TPOZ GTMS / hydroxyorganosilane) is sometimes referred to as "adhesive". AC-131 has Part A, which is an aqueous mixture of acetic acid and tetra-n-propoxyzirconium (TPOZ), and Part B, which is GTMS. The two components were mixed together (Part A + Part B) and the molar ratio of silicon to zirconium in the mixture was 2.77:1. The molar ratio of acetic acid to TPOZ in Part A was 0.45:1.

[0073]Glacial acetic acid (GAA) and glycidoxypropyl-trimethoxy-silane (GTMS) were from Sigma Aldrich, UCT chemicals and / or Acros organics. Tetra-n-propoxyzirconium (TPOZ; 70% in n-propanol) was obtained from SigmaAldrich. Antarox BL-204 (premixed, 10% wt in water) is a linear alcohol EO / PO wetting agent and w...

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Abstract

The name of the invention is Corrosion Resistant Adhesive Sol-Gel. Aspects described herein relate generally to sol-gels, which are the reaction product of a hydroxyorganosilane, a metal alkoxylate, an acid stabilizer, and a corrosion inhibitor. Hydroxyorganosilanes are represented by formula (I): wherein R is selected from the group consisting of alkyl, cycloalkyl, ether and aryl. The acid stabilizer is at a molar ratio of acid stabilizer to metal alkoxide of 1:1 or greater, and the sol-gel has a pH of from about 3 to about 4.

Description

technical field [0001] Aspects of the disclosure generally relate to corrosion resistant sol-gel films for aerospace applications. Background technique [0002] Aircraft surfaces are usually made of metal, such as aluminum or titanium. Primers can be applied to metal surfaces to stop and reduce corrosion. However, because the primer does not adhere sufficiently to the metal surface, an adhesive coating is typically placed between the metal surface and the primer to promote adhesion between the metal and the primer. [0003] An adhesive sol-gel film may be disposed at the interface between the metal and the primer. After prolonged use of aircraft surfaces, pores may form within the sol-gel film. The pores retain water over time, which promotes corrosion of the metal surface. Conventional sol-gel films do not inherently possess corrosion-resistant properties. Furthermore, the presence of water within the pores suffers from an increase in the osmotic pressure within the po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C20/08
CPCC23C20/08C09D5/002C23C18/1254C23C2222/20C09D5/08Y10T428/31663C09D185/00B64D45/00B64D2045/009B60Y2410/13B60Y2200/50
Inventor W·M·舒特P·J·凯伦
Owner THE BOEING CO
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