Water-based rust conversion paint and preparation method thereof

A rust conversion agent and rust-carrying technology, which is applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of alkaline emulsion stability damage, etc., and achieve the effect of excellent conversion effect, good stability and strong corrosion resistance

Inactive Publication Date: 2015-11-18
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used rust converters include phosphoric acid, tannic acid, and potassium ferrocyanide, etc., but these rust converters are acidic, and the conversion process of iron rust requires acidic conditions, and acidic rust converters have a negative effect on the commonly used alkaline Emulsion stability is disrupted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The waterborne rust conversion coating includes the following components (parts by mass): vinyl chloride-vinylidene chloride-acrylic acid copolymer emulsion: 45, rust conversion agent (hydroxyethylidene diphosphonic acid): 10, coloring pigment (titanium dioxide): 7, anti Rust pigment (zinc aluminum phosphate): 13, filler (precipitated barium sulfate): 5, defoamer (polyether siloxane copolymer emulsion): 0.2 part, dispersant (sodium hexametaphosphate): 0.5, film forming aid Agent (ethylene glycol butyl ether): 2, emulsion stabilizer (polyoxyethylene polyoxypropylene ether block copolymer): 1, thickener (organic modified montmorillonite): 0.2, antifungal agent (sodium benzoate) ): 0.3, water: 15.

Embodiment 2

[0025] The water-based rust conversion coating includes the following components (parts by mass): vinyl chloride-vinylidene chloride-acrylic acid copolymer emulsion: 35, rust conversion agent (ethylenediamine tetramethylene phosphonic acid): 10, coloring pigment (titanium dioxide): 7 , Anti-rust pigment (zinc aluminum phosphate): 13, filler (precipitated barium sulfate): 5, defoamer (polyether siloxane copolymer emulsion): 0.2 parts, dispersant (sodium hexametaphosphate): 0.5, into Membrane additives (ethylene glycol butyl ether): 2, emulsion stabilizer (polyoxyethylene polyoxypropylene ether block copolymer): 1, thickener (organic modified montmorillonite): 0.2, antifungal agent ( Sodium benzoate): 0.3, water: 25.

Embodiment 3

[0028] Evaluation method: The present invention uses the salt spray test method to evaluate the corrosion resistance of the coating. The salt spray experiment was carried out according to the national standard GB / T1771-2007. The sample plate is a 150mm×75mm×3mm Q235 steel plate. The coating is prepared by air spraying, and the coating thickness is 70±10μm. The salt spray test time is 400 hours.

[0029] The paints of the above-mentioned comparative examples and examples were sprayed on the rust-removed and rust-removed rust-removed steel sheet, and then dried at room temperature for 15 days for testing. The specific results are as follows:

[0030] The emulsion in Comparative Example 1 was demulsified after being mixed with hydroxyethylidene diphosphonic acid. The coating in Comparative Example 2 foamed 200 hours after the salt spray test. The coating in Example 1, Example 2 and Example 3 No defects such as blistering or rusting were found in the layer after 400h of salt spray e...

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PUM

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Abstract

The invention discloses a water-based rust conversion paint and a preparation method thereof. For an existing rust conversion coating, a commonly used rust converting agent is acidic, and an acidic condition is required for an iron rust conversion process. The acidic rust converting agent can damage the stability of a commonly used alkaline emulsion. The water-based rust conversion paint comprises the components of, by mass, 30-47 parts of an aqueous polymer emulsion, 2-12 parts of a rust converting agent, 3-17 parts of a coloring pigment, 3-20 parts of an anti-rust pigment, 4-8 parts of a filler, 0.1-0.5 part of a deforming agent, 0.1-1 part of a dispersing agent, 0.5-4 parts of a film coalescing aid, 0.1-2 parts of an emulsion stabilizer, 0.1-0.5 part of a thickeners, 0.1-0.5 part of a mildew preventive, and 10-35 parts of water. The paint has good stability, and excellent rust layer conversion effect. A coating formed with the paint has good corrosion resistance. The paint is suitable for steel rusty surface rust conversion and corrosion prevention, and is mainly used as a primer.

Description

Technical field [0001] The invention relates to the field of coatings, in particular to a water-based rusty conversion coating and a preparation method thereof. Background technique [0002] Rust and corrosion of steel materials will affect their appearance and use, and anti-corrosion coatings are usually used as a protective layer. In order to obtain excellent protective performance, the steel surface needs to be derusted before painting, otherwise the anti-corrosion effect of the coating will be affected by the growth of rust. [0003] Rusty paint refers to the paint that can be directly applied on a certain rusted metal surface and obtains an anti-corrosion effect. Using rusty paint can save the tedious process of steel rust removal. Water-based rusty coatings have been vigorously promoted due to their environmental friendliness and non-combustibility. According to the mode of action, the rusty paint can be divided into three types: stable, penetrating and transforming. Among ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/06C09D5/08C09D7/12
Inventor 刘福春祝郦伟钱洲亥王思齐韩恩厚刘敏周海飞沈晓明
Owner STATE GRID CORP OF CHINA
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