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A kind of water-based antirust coating with rust and preparation method thereof

A technology of anti-rust and coating with rust, applied in the field of coatings, can solve problems such as rapid failure of anti-corrosion effect, poor compounding ratio, accelerated corrosion of phosphoric acid, etc., achieve excellent anti-corrosion performance and adhesion performance, improve adhesion and anti-corrosion performance, The effect of promoting hydrolysis

Active Publication Date: 2019-11-05
SHENYANG SHUNFENG IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many deficiencies in the simple compounding of phosphoric acid and tannic acid. First, the poor compounding ratio of the two will lead to accelerated corrosion of the metal substrate by phosphoric acid. Second, the rust layer transformed by tannic acid is difficult to adhere to the metal layer passivated by phosphoric acid. Lead to poor coating adhesion and rapid failure of anti-corrosion effect

Method used

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  • A kind of water-based antirust coating with rust and preparation method thereof
  • A kind of water-based antirust coating with rust and preparation method thereof
  • A kind of water-based antirust coating with rust and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] The preparation method of the water-based anti-rust coating with rust specifically includes the following steps.

[0022] (1) Preparation of rust-removing agent: Add 5g of tannic acid into a three-necked bottle containing 50mL of dioxane, ventilate nitrogen, turn on the mechanical stirring at a stirring speed of 100 rpm, and then slowly pour it into the three-necked bottle Add 1g of phenylphosphoryl dichloride, after adding all of the phenylphosphoryl dichloride, add 1g of triethylamine to the three-necked flask, and react at 50°C for 5h; after the reaction is completed, filter and wash the product, first with anhydrous methanol Once, washed once with dichloromethane, and finally the product was vacuum-dried at 40°C for 24 hours to obtain a rust-reducing agent.

[0023] (2) Preparation of the rust-removing activator: add 5 mL of Span 80, 10 mL of liquid paraffin, and 5 mL of naphthenic oil into the stirring container, turn on the stirrer, set the stirring speed at 100 r...

Embodiment 2

[0026] The preparation method of the water-based anti-rust coating with rust specifically includes the following steps.

[0027] (1) Preparation of rust-removing agent: Add 15g of tannic acid into a three-necked bottle containing 150mL of dioxane, ventilate nitrogen, turn on the mechanical stirring at a stirring speed of 300 rpm, and then slowly pour it into the three-necked bottle Add 5g of phenylphosphoryl dichloride, after adding all of the phenylphosphoryl dichloride, add 3g of triethylamine to the three-necked flask, and react at 100°C for 12h; after the reaction is completed, filter and wash the product, first with anhydrous methanol 2 times, and then washed 2 times with dichloromethane, and finally the product was vacuum-dried at 60°C for 48 hours to obtain a rust-reducing agent.

[0028](2) Preparation of rust-removing activator: add 10 mL of Span 80, 20 mL of liquid paraffin, and 10 mL of naphthenic oil into the stirring container, turn on the stirrer, and set the sti...

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Abstract

The invention belongs to the field of coating and in particular relates to waterborne antirust coating with rust and a preparation method thereof. The waterborne antirust coating with the rust is prepared from the following raw materials in parts by weight: 30 to 50 parts of waterborne epoxy resin, 5 to 10 parts of de-ionized water, 20 to 30 parts of a rust conversion agent, 10 to 15 parts of a rust conversion activating agent and 5 to 10 parts of a waterborne curing agent. According to the waterborne antirust coating with the rust, provided by the invention, phenolic hydroxyl on a modified tannic acid molecule and iron rust can form a chelate stable rust layer, and phosphorus hydroxyl generated by decomposing the molecule and a metal matrix can form metal phosphate, so that a passivationprotection layer is formed on the surface of metal. The rust conversion activating agent can be used for promoting the rust conversion agent to hydrolyze and rapidly sticking the rust layer and a metal layer. The coating can have excellent anticorrosion performance and attachment performance under the common effect of the rust conversion agent and the rust conversion activating agent.

Description

Technical field [0001] The invention belongs to the field of coatings, and in particular relates to a water-based rust-resistant anti-rust coating and a preparation method thereof. Background technique [0002] With the development of modern industry, research on the anti-corrosion of steel has attracted more and more attention. The amount of steel scrapped due to corrosion in the world every year accounts for more than 20% of the total steel production, and the loss caused by steel corrosion in my country is about 4% of GDP. According to incomplete statistics, the annual loss caused by metal corrosion in my country is as high as Tens of billions of yuan. Metal corrosion not only causes huge economic losses, but corrosion damage to metal equipment and facilities can also affect the stability of production, disrupt people's living order, and even cause safety accidents and personal injuries. In order to slow down the corrosion of steel, the most effective way is to apply ant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08C23C22/05
CPCC09D5/08C09D163/00C23C22/05
Inventor 朱进军王杨松付琬璐葛晶李迎旭柴立强程徐林
Owner SHENYANG SHUNFENG IND GRP CO LTD