Inorganic zinc-rich anticorrosive nano-attapulgite coating and its preparation method

A technology of inorganic zinc-rich anti-corrosion coatings, applied in anti-corrosion coatings, alkali metal silicate coatings, etc., can solve the problems of poor mechanical properties of water-based zinc-rich anti-corrosion coatings, low bonding force between coatings and substrates, low impact strength and Poor flexibility and other problems, to achieve the effects of crack suppression, strong bonding, and good impact resistance

Active Publication Date: 2013-06-26
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Inorganic zinc-rich coatings have the above-mentioned advantages, but there are also some disadvantages: the zinc content in the coating of inorganic zinc-rich coatings exceeds 70%, and the coating is relatively "brittle" and has poor impact resistance; the coating and the substrate are not well bonded. Highly prone to cracking, resulting in cracked coating defects, etc.
However, the mechanical properties of the water-based zinc-rich anti-corrosion coating are not good, such as impact strength and flexibility are poor, and its mechanical properties need to be further improved

Method used

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  • Inorganic zinc-rich anticorrosive nano-attapulgite coating and its preparation method
  • Inorganic zinc-rich anticorrosive nano-attapulgite coating and its preparation method

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preparation example Construction

[0035] A preparation method of nano attapulgite inorganic zinc-rich anticorrosion coating, comprising the following steps:

[0036] 1) Preparation of component A:

[0037] Based on 100% of the mass percentage of component A, component A adopts the following components in mass percentage;

[0038] Inorganic binder 68%~87%;

[0039]Synthetic resin emulsion 8% to 30%;

[0040] Wetting and dispersing agent 1.5%~4%;

[0041] Defoamer 0.5% ~ 2%;

[0042] Put the inorganic binder with a modulus of 3.0 to 5.0 (one or more of potassium silicate solution, sodium silicate solution, lithium silicate solution) into the container, and add the above synthetic resin emulsion (benzene Acrylic emulsion or silicone acrylic emulsion), wetting and dispersing agent (polycarboxylate sodium salt type wetting and dispersing agent) and defoamer (polyether type defoamer or silicon dioxide type defoamer) to prepare component A;

[0043] 2) Preparation of nano-attapulgite in component B: Add 50g of a...

Embodiment 1

[0051] 1) Take 87 grams of potassium silicate-sodium silicate solution with a modulus of 3.5 (produced by Hebei Xingtai Dayang Chemical Co., Ltd., model DY-KN), and add 10 grams of styrene-acrylic emulsion (Rohm and Haas AS-398), 2 grams of wetting and dispersing agent (polycarboxylate sodium salt type wetting and dispersing agent SN-5040 produced by Nopco) and 1 gram of defoamer (SPG-10 produced by Nantong Hongfeng Industrial Auxiliary Co., Ltd. Type polyether defoamer), stir to make it completely dispersed, and make component A;

[0052] 2) Add 8 grams of nano-attapulgite (fibrous attapulgite with a diameter of 25-80nm and a length of 0.5-3μm) into the above-mentioned component A solution, and stir for 1.5 hours at 1500 rpm to make the nano-attapulgite in the liquid Disperse evenly in the medium, and finally add 292 grams of 500-mesh zinc powder, the mass ratio of component A and component B is 1:3, and keep stirring for 30 minutes, and filter to obtain nano attapulgite inor...

Embodiment 2

[0055] 1) Take 81 grams of potassium silicate solution with a modulus of 4.0 (produced by Hebei Xingtai Dayang Chemical Co., Ltd., model DY-K), add 15 grams of styrene-acrylic emulsion (Rohm and Haas AS-398), 2.5 grams of wetting and dispersing agent (the polycarboxylate sodium salt type wetting and dispersing agent SN-5040 produced by Nopco) and 1.5 grams of defoamer (SPG-10 polyether defoamer produced by Nantong Hongfeng Industrial Auxiliary Co., Ltd.) Foaming agent), stir to make it completely dispersed, and make A component.

[0056] 2) Add 10 grams of nano-attapulgite (fibrous attapulgite with a diameter of 25-80 nm and a length of 0.5-3 μm) into the above-mentioned component A solution, and stir for 1.5 hours at 1500 rpm to make the nano-attapulgite in the liquid Disperse evenly in the medium, and finally add 290 grams of 600-mesh zinc powder, the mass ratio of component A and component B is 1:3, and continue stirring for 30 minutes, and filter to obtain nano-attapulgite...

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Abstract

The invention discloses an inorganic zinc-rich anticorrosive nano-attapulgite coating. The inorganic zinc-rich anticorrosive nano-attapulgite coating is obtained through mixing a component A and a component B according to a component A / component B mass ratio of 1:2-4, 100% by mass of the component A comprises 68-87% by mass of an inorganic adhesive, 8-30% by mass of a synthetic resin emulsion, 1.5-4% by mass of a wetting dispersant and 0.5-2% by mass of an antifoaming agent; and 100% by mass of the component B is composed of 85-98% by mass of zinc powder and 2-15% by mass of nano-attapulgite. The inorganic zinc-rich anticorrosive nano-attapulgite coating has the advantages of strong adhesion with a metal base, good flexibility, good salt spray resistance, good impact resistance and the like, and can be used in various different situations. The invention also discloses a preparation method of the inorganic zinc-rich anticorrosive nano-attapulgite coating. The preparation method has the advantages of good controllability, easy operation, low production cost and easy industrialized production.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a nano-attapulgite inorganic zinc-rich anti-corrosion coating made from ultrafine zinc powder, nano attapulgite and an inorganic binder as main raw materials and a preparation method thereof. Background technique [0002] Corrosion of metal refers to the phenomenon that the metal is destroyed by the chemical or electrochemical action of the environmental medium. The corrosion of metals spreads all over the national economy and brings huge losses to the national economy. According to statistics, about 100 million tons of metals are corroded and scrapped in the world every year, accounting for 20% to 40% of the annual output. At present, the annual economic loss caused by corrosion of metal structures in the world has reached hundreds of billions of dollars. For a long time, people have used a variety of techniques to protect metals from corrosion. Among them, one of the m...

Claims

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Application Information

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IPC IPC(8): C09D1/04C09D5/10
Inventor 刘丰华许高杰程昱川郭建军
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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