Coated steel bar and preparation method thereof

A coating and steel bar technology, applied in coatings, anti-corrosion coatings, epoxy resin coatings, etc., to achieve the effects of good film-forming properties, improved hardness, and high adhesion

Active Publication Date: 2015-12-23
SUNYOUNG CONSTR GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology requires the addit

Method used

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  • Coated steel bar and preparation method thereof
  • Coated steel bar and preparation method thereof
  • Coated steel bar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] In the coated steel bar of this embodiment, the coating material on the surface is composed of the following components and their weight percentages:

[0032]

[0033] The epoxy resin adopts CIBA's epoxy resin GY2600, Eq=0.25.

[0034] The mass content of the aminopropyl triethoxysilane is ≥98%.

[0035] The mass content of the ethyl orthosilicate is 28%.

[0036] According to the above ratio, add epoxy resin, ethyl orthosilicate TEOS, ethanol (transparent liquid) into a glass reactor, pneumatically stir, the circulating water temperature is 20-30 ℃, after constant temperature, start to add amino silane (amino propyl Grade triethoxysilane), after a few minutes (1-10 minutes), the temperature rises to 35°C, and the dropping rate is controlled to keep the temperature below 40°C for reaction. After the addition is completed, keep the temperature for 4 hours to obtain the above coating material.

[0037] Then follow the steps below to apply the above-mentioned coa...

Example Embodiment

[0042] Example 2

[0043] In the coated steel bar of this embodiment, the coating material on the surface is composed of the following components and their weight percentages:

[0044]

[0045] The epoxy resin adopts CIBA's epoxy resin GY2600, Eq=0.25.

[0046] The mass content of the aminopropyl triethoxysilane is ≥98%.

[0047] The mass content of the ethyl orthosilicate is 28%.

[0048] Follow the steps below to apply the above coating material to the surface of the steel bar:

[0049] Step 1, sandblasting to make the surface roughness of the steel bar 3.0~3.5μm;

[0050] Step 2. Remove sand and dust on the surface of the steel bar to ensure that the surface of the workpiece is clean and free of oil or other foreign matter;

[0051] Step 3: Coat the surface of the steel bars uniformly after the above step 2 with a coating, and the dry film thickness is required to be 5-15 μm;

[0052] Step 4: Curing at room temperature for 0.5 to 1 hour, and then maintaining at 150°C to 180 for 30 to 60 ...

Example Embodiment

[0053] Example 3

[0054] In the coated steel bar of this embodiment, the coating material on the surface is composed of the following components and their weight percentages:

[0055]

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Abstract

The invention provides a coated steel bar and a preparation method thereof. The coated steel bar comprises a steel bar and a coating on the surface of the steel bar; the coating is prepared from, by weight, 20%-35% of epoxy resin, 30%-50% of aminopropyltriethoxysilane, 12%-25% of ethyl orthosilicate and 12%-25% of absolute ethyl alcohol. The preparation method comprises the steps that sand blasting is conducted to make the roughness of the surface of the steel bar range from 3.0 micrometers to 3.5 micrometers; gravel and dust on the surface of the steel bar are removed, and it is guaranteed that the surface of a workpiece is clean and without any greasy dirt or other foreign bodies; the coating is evenly coated on the surface of the treated steel bar, and the thickness of a dry film is required to reach 5-15 micrometers; curing molding is conducted at the room temperature, and the coated steel bar is obtained. The coated steel bar is formed by spraying coating materials on the surface of the steel bar, and the hardness and the corrosion resistance of the coated steel bar are greatly improved.

Description

technical field [0001] The invention relates to a steel bar in the technical field of construction engineering, in particular to a steel bar that can be coated with a coating and a preparation method thereof. Background technique [0002] Reinforced concrete is widely used in the field of civil engineering as an economical and durable material. Under the action of various external environmental conditions, the durability of concrete will decline, and the protection of its internal steel bars will gradually be lost. When the concrete outside the steel bar becomes neutral or cracks, the steel bar loses the protection of the alkaline concrete, the passivation film is destroyed and begins to rust. Corroded steel bars not only lose the cross-sectional area, but also degrade the properties of the material, which affects the bearing capacity and performance of concrete components. Steel bar corrosion is the most important and direct factor that causes the durability decline of con...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D7/12C09D5/08E04C5/01
Inventor 杨海华赵鸣李迥李尚龙
Owner SUNYOUNG CONSTR GROUP
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