Corrosion-resisting and rustproof water-based potassium silicate zinc-enriched primer for surface treatment of steel structure and production method of corrosion-resisting and rustproof water-based potassium silicate zinc-enriched primer

Abstract

The invention discloses corrosion-resisting and rustproof water-based potassium silicate zinc-enriched primer for surface treatment of a steel structure. The corrosion-resisting and rustproof water-based potassium silicate zinc-enriched primer is prepared from the following raw materials in parts by weight: 102 to 104 parts of flake zinc powder, 12 to 14 parts of potassium silicate, 1.7 to 1.9 parts of fluorocarbon emulsion, 6.2 to 7.2 parts of styrene-acrylic emulsion, 3.2 to 3.7 parts of aminopropyltriethoxysilane, 0.9 to 1.2 parts of neodymium nitrate, 6 to 9 parts of plaster fiber, 1.5 to 1.8 parts of stearic acid, 7 to 9 parts of conductive titanium dioxide, 0.7 to 0.9 part of kathon, 1.9 to 2.3 parts of nano boron nitride, 5 to 7 parts of phytic acid and 25 to 27 parts of de-ionized water. According to the corrosion-resisting and rustproof water-based potassium silicate zinc-enriched primer, the styrene-acrylic emulsion is modified by the fluorocarbon emulsion and then is added into a raw material to compound with a potassium silicate solution; the silane doped and rare earth commonly-modified flake zinc powder is used and is matched with other effective auxiliary agents to prepare the zinc-enriched primer and the zinc-enriched primer has excellent corrosion-resisting and rustproof properties; the paint has extremely excellent corrosion-resisting effect on a steel sheet material workpiece under the conditions that the outdoor wind powder is grade 5 and the temperature is 50 DEG C.

Description

technical field [0001] The invention relates to the technical field of zinc-rich coatings, in particular to a corrosion-resistant and anti-rust steel structure surface treatment water-based zinc-rich potassium silicate primer and a preparation method thereof. Background technique [0002] Zinc-rich primer is a type of anti-corrosion coating product that uses zinc powder with a sacrificial anode function as the main anti-rust pigment. It has a cathodic protection effect on steel substrates and has been widely used for ships, offshore oil production platforms, containers, docks, and gates for a long time. , storage tanks, pipelines and bridges, etc. protection. Currently commonly used mainly epoxy zinc-rich primers, alcohol-soluble inorganic zinc-rich primers and water-based inorganic zinc-rich primers. [0003] The water-based inorganic zinc-rich primer is a heavy-duty anti-corrosion coating with water as the solvent, silicate (including potassium silicate, sodium silicate, ...

AI Technical Summary

Problems solved by technology

Inorganic substances have better electrical conductivity than organic substances, so zinc powder has a stronger cathodic protection effect. The corrosion resistance of water-based inorganic zinc-rich primers is far superior to organic zinc-rich coatings, but it also has the common problems of inorganic coatings, such as coating film Brittle and easy to crack, poor adhesion, poor decorative effect, etc., and organic materials have better flexibility after film formation, so some water-soluble emulsion can be added to the water-based inorganic zinc-rich primer as auxiliary film-forming material to make organic matter Fill in the "-Si-O-Si-" network structure to improve the flexibility of the coating. For example, the literature "Research on the Modification of Zinc-rich Coatings by Styrene-Acrylic Emulsion" prepared styrene-acrylic emulsion as a modifier. A kind of waterborne inorganic zinc-rich paint modified by styrene-acrylic emulsion

[0004] However, the literature only introduces the amount of styrene-acrylic emulsion added and the flexibility of the coating. With the continuous optimization of the production process and formula, it is found that the scale-shaped zinc powder is better than the spherical zinc powder in terms of covering ability, floating ability and shielding ability. The advantages are outstanding, so the scaly zinc powder has gradually become the preferred filler for zinc-rich coatings, but its activity is too strong in water-based inorganic silicate alkaline coatings, poor anti-sedimentation, and easy to agglomerate, resulting in rapid failure of the coating and uneven surface. To a certain extent, the application of coatings is limited

Therefore, it is an urgent problem to be solved at this stage to study a new multifunctional water-based inorganic zinc-rich anti-corrosion primer formula that can overcome the problems of easy sedimentation and poor dispersibility of zinc powder.