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Corrosion resistant sol gel comprising soluble thio-lanthanide salt

A technology of sol-gel and lanthanide elements, applied in anti-corrosion coatings, coatings, etc., can solve problems such as poor dissolution, reduced adhesion of sol-gel films, and reduced corrosion resistance of corrosion inhibitors

Active Publication Date: 2020-10-20
THE BOEING CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these inhibitors have been found to reduce the adhesion of sol-gel films and are poorly soluble in aqueous sol-gels, which reduces the corrosion resistance of the corrosion inhibitors when present in sol-gels

Method used

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  • Corrosion resistant sol gel comprising soluble thio-lanthanide salt
  • Corrosion resistant sol gel comprising soluble thio-lanthanide salt
  • Corrosion resistant sol gel comprising soluble thio-lanthanide salt

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Embodiment

[0208] Experimental Materials : Cerium(III) nitrate hexahydrate and Praseodymium(III) nitrate hexahydrate were obtained from Sigma-Aldrich, St. Louis, MO. 3% AC-131 kit was obtained from 3M. 3% AC-131 is a non-chromate conversion coating for aluminum, nickel, stainless steel, magnesium and titanium alloys. Part A of AC-131 is an aqueous mixture of acetic acid and tetra-n-propoxyzirconium (TPOZ), while part B is GTMS. The two components were mixed together (Part A + Part B) in a molar ratio of silicon to zirconium of 2.77:1 in the mixture. In Part A, the molar ratio of acetic acid to TPOZ was 0.45:1.

[0209] Glacial acetic acid (GAA) and glycidoxypropyltrimethoxysilane (GTMS) were obtained from Sigma-Aldrich. Tetra-n-propoxyzirconium (TPOZ; 70% in n-propanol) was obtained from Sigma-Aldrich. Antarox BL-240 (premixed, 10% by weight in water) is a linear alcohol ethylene oxide (EO) / propylene oxide (PO) wetting agent available from Solvay Chemicals. Epoxy non-chromate prim...

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Abstract

Aspects described herein generally relate to a sol-gel that is the reaction product of an organosilane, a metal alkoxide, an acid, and a thio-lanthanide salt having a solubility of about 1 gram or greater per gram of sol-gel at 23 DEG C. The thio-lanthanide salt includes a cation and a thio-ligand. The cation can be lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium, cobalt, calcium, strontium, barium, and zirconium. In another aspect, a component, such as a vehicle component, includes a metal substrate and a sol-gel disposed on the metal substrate. Methods can include forming a sol-gel by mixing a metal alkoxide and an acid to form a first mixture; mixing with the first mixture an organosilane to form a second mixture; and mixing with the second mixture a lanthanide salt to form a third mixture.

Description

[0001] Cross References to Related Applications [0002] This application for patent claims the benefit and priority of U.S. Nonprovisional Patent Application No. 16 / 252,387, filed January 18, 2019, and U.S. Provisional Patent Application No. 62 / 625,785, filed February 2, 2018, which are adopted in their entirety incorporated herein by reference. technical field [0003] Aspects of the present disclosure relate generally to corrosion resistant sol-gels and methods for forming the sol-gels. Background technique [0004] Aircraft surfaces are usually made of metals such as aluminum or titanium. Primers can be applied to metal surfaces to prevent or reduce corrosion. In addition, an adhesive coating is typically placed between the metal surface and the primer to promote adhesion between the metal and the primer. [0005] An adhesive sol-gel film may be provided at the interface between the metal and the primer. Sol-gel films may become increasingly porous after long-term us...

Claims

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Application Information

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IPC IPC(8): C09D5/08C09D7/60C09D183/06C08K5/00
CPCC08G77/58C09D5/082C08K5/0091C09D183/14C09D7/60C08G77/16C08G77/18C08G2150/90C08K5/057C08K5/09C08K5/378C09D5/024C09D5/086C09D183/06
Inventor W·M·舒特P·J·金伦P·A·怀特
Owner THE BOEING CO