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Rare-earth salt and zeolite doped silane composite film and preparation and application methods thereof

A technology of composite film and rare earth salt, which is applied in the direction of metal material coating process, etc., can solve the problem of no silane composite film, etc., and achieve the effect of high reproducibility, improved corrosion resistance, and non-pollution conditions

Active Publication Date: 2019-01-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] There are no related reports on silane composite films doped with rare earth salts and zeolite particles at the same time

Method used

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  • Rare-earth salt and zeolite doped silane composite film and preparation and application methods thereof
  • Rare-earth salt and zeolite doped silane composite film and preparation and application methods thereof
  • Rare-earth salt and zeolite doped silane composite film and preparation and application methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] (1) Sample pretreatment

[0072] Cut the 7N01 aluminum alloy into 15×15×2mm samples, boil them in boiling water, polish them with water abrasive paper, and then ultrasonically clean them in absolute ethanol and deionized water;

[0073] (2) Preparation of silane mixture

[0074] Mix ethanol, bis-(γ-triethoxysilylpropyl) tetrasulfide silane, and deionized water in a volume ratio of 90:5:5, and the concentration is 1×10 -3 Add mol / L cerium nitrate to the mixture, age at room temperature for 3 days, add 0.1 g / L zeolite nanoparticles into the mixture, stir for 2 minutes and then ultrasonicate for 2 minutes to obtain a silane mixture;

[0075] (3) Curing of silane composite film

[0076] Put the pretreated aluminum alloy sample into the aged silane mixture, take it out after soaking for 1 min, put it in an oven and cure it at 80°C for 1 h to form a silane composite film.

Embodiment 2

[0078] (1) Sample pretreatment

[0079] Cut the 7020 aluminum alloy into 15×15×2mm samples, boil them in boiling water, polish them with water abrasive paper, and then ultrasonically clean them in absolute ethanol and deionized water;

[0080] (2) Preparation of silane mixture

[0081] Mix ethanol, bis-(γ-triethoxysilylpropyl) tetrasulfide silane, and deionized water evenly in a volume ratio of 90:5:5, and the concentration is 5×10 -3 Add mol / L cerium nitrate to the mixture, age at room temperature for 1 day, add 0.1 g / L zeolite nanoparticles into the mixture, stir for 2 minutes and then ultrasonicate for 2 minutes to obtain a silane mixture;

[0082] (3) Curing of silane composite film

[0083] Put the pretreated aluminum alloy sample into the aged silane mixture, take it out after soaking for 1 min, put it in an oven and cure it at 60°C for 1 h to form a silane composite film.

Embodiment 3

[0085] (1) Sample pretreatment

[0086] Cut the 6063 aluminum alloy into 15×15×2mm samples, boil them in boiling water, polish them with water abrasive paper, and then ultrasonically clean them in absolute ethanol and deionized water;

[0087] (2) Preparation of silane mixture

[0088]Mix ethanol, bis-(γ-triethoxysilylpropyl) tetrasulfide silane, and deionized water in a volume ratio of 85:5:10, and the concentration is 9×10 -3 Add mol / L cerium nitrate into the mixture, age at room temperature for 2 days, add zeolite nanoparticles into the mixture at 0.5 g / L, stir for 2 minutes and then sonicate for 2 minutes to obtain a silane mixture;

[0089] (3) Curing of silane composite film

[0090] Put the pretreated aluminum alloy sample into the aged silane mixture, take it out after soaking for 1min, put it in an oven and cure it at 119°C for 1h to form a silane composite film.

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Abstract

The invention discloses a rare-earth salt and zeolite doped silane composite film and preparation and application methods thereof. The preparation method includes: preparing rare-earth salt and zeolite particle doped silane mixed liquid, aging, impregnating the surface of a metal material with the mixed liquid or spraying the mixed liquid to the surface of the metal material, and curing to form acompact and corrosion-resistant silane composite film on the surface of the aluminum alloy. The preparation method has the advantages that the porous zeolite particles are used to load the rare-earthsalt which can inhibit corrosion and has a self-repairing effect, the crosslinking density of the silane film is enhanced by the zeolite particles, the physical barrier effect of the silane film on corrosive media is enhanced effectively, and the corrosion resistance of the silane film on the surface of metal is increased; the compactness of the rare-earth salt and zeolite doped silane composite film on the surface of the metal is increased greatly, the composite film can effectively block the penetration of external corrosive substances, the combining strength of high-polymer coating and themetal can be increased, the corrosion resistance of the metal is effectively enhanced, and the corrosion-resistant service requirements of the metal material under harsh environment conditions can besatisfied.

Description

technical field [0001] The invention relates to a silane composite film doped with rare earth salt and zeolite for anti-corrosion and its preparation and application method, belonging to the technical field of metal surface treatment. Background technique [0002] Metal materials are very common in industrial production as an essential material for life, but they are corroded by the chemical or electrochemical action of the environmental medium, which not only causes major economic losses, but also causes harmful substances to pollute the living environment and damage human health. Therefore, many researchers have done a lot of research on metal anti-corrosion measures. It is generally divided into the following categories: development of corrosion-resistant metal materials, covering of metal surfaces with protective layers, modification of metal surfaces, corrosion inhibition by corrosion inhibitors and electrochemical protection. Organic coatings are widely used as the mo...

Claims

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Application Information

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IPC IPC(8): C23C22/68
CPCC23C22/68C23C2222/20
Inventor 陈明安彭纱顾阳
Owner CENT SOUTH UNIV
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