Galvanized steel plate with visible light-responsive photocatalytic coating on surface and manufacturing method thereof

A galvanized steel sheet, surface loading technology, applied to the surface coating liquid device, chemical instruments and methods, coatings, etc., can solve problems such as galvanized steel sheet corrosion, to improve the bonding strength, eliminate haze-causing sources and High effect of VOC and post-processing performance

Inactive Publication Date: 2019-08-02
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] For existing photocatalytic coatings that do not have the ability to eliminate NO x function, and the galvanized steel sheet is prone to corrosion, th

Method used

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  • Galvanized steel plate with visible light-responsive photocatalytic coating on surface and manufacturing method thereof
  • Galvanized steel plate with visible light-responsive photocatalytic coating on surface and manufacturing method thereof
  • Galvanized steel plate with visible light-responsive photocatalytic coating on surface and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In 18 embodiments of the present embodiment and 5 comparative examples, all use hot-dip galvanized steel plate, and adopt the mode coating passivation film 2 and photocatalytic coating 3 on its surface by roller coating.

Embodiment 1-1

[0049] like figure 1 and figure 2 as shown,

[0050] In this embodiment, a hot-dip pure galvanized steel sheet with a thickness of 0.8 mm (zinc adhesion is 60 g / m2) is used, and its surface roughness Ra is (0.8-1.2) microns.

[0051] At first on the galvanized steel sheet 1, adopt the method for vertical roller coating, with the technology that coating roll speed ratio 160%, take-up roll speed ratio 35%, take-off roll and coating roll pressure 4.0KN will solid content be 20 % (calculated as zirconate, the balance being fluoride, phosphoric acid and water) chemical passivation treatment solution is coated on the surface of galvanized steel sheet 1, and phosphoric acid in the chemical treatment solution reacts with the zinc layer, reducing the pH of the treatment solution At the same time, the generated zinc ions and zirconate together form a hydrated complex, heated at 400°C for 10 seconds, and after the water is volatilized, a passivation layer with an adhesion amount of 70...

Embodiment 2

[0057] In 9 examples of present embodiment, all use hot-dip galvanized steel plate, and adopt the mode of roller coating to coat passivation film 2 and photocatalytic coating 3 on its surface.

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Abstract

The invention discloses a galvanized steel plate with a visible light-responsive photocatalytic coating on the surface and a manufacturing method thereof, and belongs to the field of new building materials. The galvanized steel plate comprises a galvanized steel plate body, a passivation film and a photocatalytic coating. According to the galvanized steel plate, at least one surface of the galvanized steel plate body is coated with the passivation film, and the nitrogen-doped modified photocatalytic coating is laminated on the passivation film; the passivation film can protect the galvanized steel plate from being corroded; the photocatalytic coating can remove organic matters and nitric oxide from air under visible light response, so that the service life of the galvanized steel plate isprolonged, and an effect of purifying the air is achieved.

Description

technical field [0001] The invention belongs to the field of new building materials, and more specifically relates to a galvanized steel sheet with a visible light-responsive photocatalytic coating on its surface and a manufacturing method thereof. Background technique [0002] The results of the study showed that nitrogen oxides (NO x ) emission is the internal cause of smog: NO x After being discharged into the atmosphere, due to its low valence state, complex chemical reactions occur under the oxidation of free radicals in the atmosphere to generate high-valence nitrates. Therefore, NO x It is a key pollutant that enhances the oxidation of the atmosphere and is also the main component of PM2.5. [0003] Photocatalysts, especially titanium dioxide, have attracted the attention of those skilled in the art due to their unique properties in recent years. Titanium dioxide can undergo free radical reaction under ultraviolet radiation, has strong oxidative properties, can d...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/56B01D53/44C23C22/76C23C22/73C23C22/34B05D7/14
CPCB01D53/8628B01D53/8687C23C22/76C23C22/73C23C22/34B05D5/061B05D7/14B01D2255/802B01D2255/20707B01D2259/80B05D2202/10B05D2202/30
Inventor 柴立涛赵云龙杨兴亮王滕张建杨平刘劼张百勇李山
Owner MAANSHAN IRON & STEEL CO LTD
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