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Sealing composition

A sealing composition and composition technology, applied in the direction of phosphorus compound, electrophoretic plating, coating, etc., can solve the problems of poor adhesion to substrates, corrosion formation, difficulty in obtaining uniform coating, etc.

Pending Publication Date: 2019-04-02
PRC DE SOTO INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, at least some coatings prepared using these compositions and methods do not perform as well as those formed using chromate treatment and / or can form corrosion and / or pits on the surface
In addition, at least some coatings known in the art containing cerium and other rare earth elements also suffer from one or more of the following disadvantages: (1) The rare earth elements precipitate in solution, leaving the metal surface as a slurry-like material Tendency; (2) It is difficult to obtain a uniform coating, it has no tendency to over-coat, and exhibits poor adhesion to the substrate; (3) It is necessary to use multiple steps and long time periods to deposit the coating; and (4) the necessity to use special conversion and solution compositions to coat multilayer alloys, especially aluminum 2024 alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0206] Table 3 - Materials used in Examples 1-5

[0207] Ridoline 298 1

[0208] 1 Non-silicate (non-silicate) cleaning agent.

[0209] 2 Deoxidizer.

[0210] 3 (2,5-dioxo-4-imidazolidinyl)urea.

[0211] 4 Nonionic surfactant.

[0212] *According to the supplier's analysis report, the concentration of cerium in cerium chloride solution is calculated as ceria (CeO 2 ) to measure.

[0213] Table 4 – Devices

[0214]

[0215] Cleaning agent used in Examples 1-8

[0216] Table 5A. - Example A

[0217] Element

[0218] The ingredients used to prepare the solution of Cleaner Example A are provided in Table 5A. Sodium hydroxide and sodium phosphate were completely dissolved in deionized water under gentle mechanical stirring using a stir plate (VWR, 7x7CER HOT / STIR). Next, the PVP was stirred until dissolved, and then the allantoin was added and stirred until dissolved, and then the DMTD was added and stirred until dissolved. After the DMTD ...

Embodiment B

900

[0221] The solution of Example B was prepared according to the manufacturer's instructions using the ingredients shown in Table 5B.

[0222] Table 6 - Deoxidizers used in Examples 4 and 5

[0223] Material

Example C

Deoxidizer 6-16, parts by volume

100

nitric acid, parts by volume

200

Tap water, parts by volume

1700

[0224] The deoxidizer solution of Example C was prepared using the ingredients shown in Table 6 according to the manufacturer's instructions.

[0225] Table 7 - Conversion Coating Compositions Used in Examples 1 and 3-8

[0226]

[0227] The ingredients used to prepare conversion coating compositions E and F are shown in Table 7.

[0228] For the conversion coating composition of Example E, the cerium nitrate, yttrium nitrate and cerium chloride solutions were weighed into individual cups. The solution was then transferred to a container containing 1000 g of deionized water with gentle stirring...

Embodiment 1

[0236] A bare aluminum 2024T3 substrate (Priority Metals, Orange County, CA) measuring 3"x5"x0.032" was hand wiped with methyl ethyl ketone (100%) and a disposable cloth and allowed to air dry, followed by chemical cleaning. The panel was immersed in the cleaner solution of Example A for 3.5 minutes at ambient temperature with intermittent agitation. The panel was then immersed in two subsequent deionized water rinses of 2 minutes each, both at ambient temperature with intermittent agitation After the second rinse, the panel was rinsed with cascaded deionized water for 10 seconds. The panel was then immersed in the conversion coating composition of Example E for 5 minutes at ambient temperature without agitation. After the conversion coating, the The panels received an immersion rinse in deionized water for 1 minute at ambient temperature with intermittent agitation, followed by a 10 second cascade rinse of deionized water.The panels were air dried overnight at ambient conditio...

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Abstract

Disclosed is a method of treating a substrate. The surface is contacted with a sealing composition comprising a lithium cation; and optionally, with conversion composition comprising a cation of a lanthanide, a Group IIIB, and / or a Group IVB metal. The conversion composition is applied to provide a film on the substrate surface resulting in a level of the lanthanide, Group IIIB metal, and / or GroupIV metal thereon of at least 100 counts greater than on a surface of a substrate that does not have the film thereon as measured by X-ray fluorescence (measured using X-Met 7500, Oxford Instruments;operating parameters 60 second timed assay, 15Kv, 45 microamp, filter 3, T(p) = 1.5 microseconds for lanthanides, Group IIIB metals, and Group IVB metals except zirconium; operating parameters 60 second timed assay, 40Kv, 10 microamp, filter 4, T(p) = 1.5 microseconds for zirconium). A substrate obtainable by the methods also is disclosed.

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Provisional Application No. 62 / 374188 filed August 12, 2016 and titled "Sealing Composition" and U.S. Provisional Application No. 62 / 374199 filed August 12, 2016 and titled "Pretreatment Composition" priority, both of which are hereby incorporated by reference in their entirety. field of invention [0003] The present invention relates to sealing compositions and methods for treating metal substrates. The invention also relates to a coated metal substrate. Background of the invention [0004] Oxidation and degradation of metals used in aerospace, commercial and private industry is a serious and costly problem. To prevent oxidation and degradation of the metals used in these applications, inorganic protective coatings can be applied to the metal surfaces. This inorganic protective coating, also known as a conversion coating, can be the only coating applied to the metal, or the coating can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/83C23C22/34C23C22/56C23C22/66
CPCC23C22/56C23C22/83C25D13/20C23C22/50C23C22/53C23C22/58C23C22/57C23C22/54C23C22/66C01B25/37C01B25/372C23C22/12C23C22/13C23C22/73C23C22/78C23G1/22C23G1/18C23C22/34C23C22/27C23C22/361C23C22/82C09D5/12C23C22/07
Inventor E·L·莫里斯G·L·珀斯特M·A·玛尤B·C·奥克伯格M·L·C·利姆
Owner PRC DE SOTO INT INC
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