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Method for preparing and coating reinforcing steel bar anticorrosive glass coating material

A glass coating and anti-corrosion technology, applied in coatings, electrolytic coatings, surface reaction electrolytic coatings, etc., can solve problems such as low interface bonding force, expansion, and aggravated corrosion, and achieve excellent acid and alkali resistance. High strength and good wear resistance

Inactive Publication Date: 2014-06-11
周伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]Reinforced concrete is widely used in high-rise buildings and road construction. This advanced building material has two unavoidable defects: the interfacial bond between the steel bar and the cement slurry The strength is not high; during use, CO2 in the air, Cl- in rainwater and seawater diffuse into the concrete from the micropores and cracks of the cement, all of which lead to the reinforcement Corrosion and expansion, causing tensile stress in the surrounding concrete, resulting in cracking and further aggravating corrosion
However, galvanized steel bars have disadvantages such as short service life, corrosion of the zinc layer on the surface, and weak bonding with concrete. Epoxy resin coatings have also been widely questioned, and their protective effect is considered limited.

Method used

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  • Method for preparing and coating reinforcing steel bar anticorrosive glass coating material
  • Method for preparing and coating reinforcing steel bar anticorrosive glass coating material
  • Method for preparing and coating reinforcing steel bar anticorrosive glass coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Cut the steel to length, polish it with sandpaper, remove the oxides on the surface, pickle and alkali wash, then put the sample into the cleaning agent for ultrasonic vibration for 5-30 min, rinse with distilled water, and dry it for later use.

[0024] Add 60wt.% of silicon dioxide, 30wt.% of boron oxide, and 10wt.% of sodium oxide into a mortar, stir and mix evenly, place in an alumina crucible, heat to 1200°C in a muffle furnace, and keep warm for 1~ 5 h. Water quenched frit. Add glass frit, 400mL of absolute ethanol, 5wt.% clay, 2 wt.% urea, and 5 wt.% sodium nitrate into the ball mill at a ball-to-material ratio of 20:1, and mill for 3 hours. The obtained glass slurry is poured into a beaker, sieved with a 200-mesh sieve, and a certain amount of absolute ethanol is added to the sieve residue to make the content of the glass frit 60wt.%. The beaker is sealed with a plastic wrap and left to stand for 5 h. Glass powder aging.

[0025] The pretreated steel is slowl...

Embodiment 2

[0027] Cut the steel to length, polish it with sandpaper, remove the oxides on the surface, pickle and alkali wash, then put the sample into the cleaning agent for ultrasonic vibration for 5-30 min, rinse with distilled water, and dry it for later use.

[0028] Add 70wt.% of silicon dioxide, 25wt.% of boron oxide, and 5wt.% of sodium oxide into a mortar, stir and mix evenly, place in an alumina crucible, heat to 1200°C in a muffle furnace, and keep warm for 1~ 5 h. Water quenched frit. Add glass frit, 400mL of absolute ethanol, 5wt.% clay, 2 wt.% urea, and 5 wt.% sodium nitrate into the ball mill at a ball-to-material ratio of 20:1, and mill for 3 hours. The obtained glass slurry is poured into a beaker, sieved with a 200-mesh sieve, and a certain amount of absolute ethanol is added to the sieve residue to make the content of the glass frit 60wt.%. The beaker is sealed with a plastic wrap and left to stand for 5 h. Glass powder aging.

[0029] The pretreated steel is slowly...

Embodiment 3

[0031] Cut the steel to length, polish it with sandpaper, remove the oxides on the surface, pickle and alkali wash, then put the sample into the cleaning agent for ultrasonic vibration for 5-30 min, rinse with distilled water, and dry it for later use.

[0032] Add 60wt.% of silicon dioxide, 30wt.% of boron oxide, and 10wt.% of sodium oxide into a mortar, stir and mix evenly, place in an alumina crucible, heat to 1200°C in a muffle furnace, and keep warm for 1~ 5 h. Water quenched frit. Add glass frit, 400mL of absolute ethanol, 50wt.% of cement, 5wt.% of clay, 2 wt.% of urea, and 5 wt.% of sodium nitrate into the ball mill with a ball-to-material ratio of 20:1, and mill for 3 hours. The obtained glass slurry is poured into a beaker, sieved with a 200-mesh sieve, and a certain amount of absolute ethanol is added to the sieve residue to make the content of the glass frit 40wt.%. The beaker is sealed with a plastic wrap and left to stand for 3 h. Glass powder aging.

[0033] ...

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Abstract

The invention discloses a method for preparing and coating a reinforcing steel bar anticorrosive glass coating material. The reinforcing steel bar anticorrosive glass coating material contains the following components in percentage by weight: 35-70% of silicon dioxide, 15-45% of boron oxide and 5-25% of sodium oxide. The preparation process of the material comprises the steps of blending according to a certain proportion, melting glass at a high temperature, maintaining the temperature for a certain period of time, and then performing water quenching to obtain a glass material; mixing the glass material with an appropriate amount of a mill addition, performing ball milling, and confecting a slurry; coating the slurry on the surface of a matrix subjected to pretreatment, and firing at a high temperature. The process method disclosed by the invention has the advantages that a steel base plate does not need nickel pre-plating, the preparation process is simple and convenient, and an obtained coating and an obtained base plate are good in cohesiveness and have excellent wear resistance and corrosion resistance.

Description

technical field [0001] The invention relates to an anti-corrosion glass coating material for steel bars, in particular to a glass coating material with acid and alkali resistance, high hardness and good wear resistance, and its preparation and coating method on steel. Background technique [0002] Reinforced concrete is widely used in high-rise buildings and road construction. This advanced building material has two unavoidable defects: the interfacial bonding force between steel bars and cement paste is not high; during use, CO in the air 2 , rainwater, Cl in seawater - Diffusion from cement micropores and cracks into concrete will lead to corrosion and expansion of steel bars, causing tensile stress in the surrounding concrete, resulting in cracking and further aggravating corrosion. [0003] In view of the above problems, currently an effective measure is to coat the steel bars in the concrete with a protective layer. The most widely used are galvanized coatings and ep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/16C25D5/02C25D11/00
Inventor 周伟郑峰龙兰
Owner 周伟
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