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Rust transforming agent and preparation method thereof, water-based iron rust conversion coating and preparation method thereof

A rust conversion agent and rust conversion technology are applied in coatings, anti-corrosion coatings, and metal material coating processes. The effect of adhesion

Inactive Publication Date: 2014-06-11
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nitric oxide formed by the reduction of nitrate used in the formula tends to form cavities on the conversion film, destroying the integrity of the conversion film

Method used

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  • Rust transforming agent and preparation method thereof, water-based iron rust conversion coating and preparation method thereof
  • Rust transforming agent and preparation method thereof, water-based iron rust conversion coating and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0050] Synthetic rust conversion agent: add 30.6g 1-2 propylene glycol to a four-neck flask and place it in a cold water bath, add 10.2g gallic acid and 1.02g p-toluenesulfonic acid in proportion under stirring conditions, raise the temperature of the water bath to 70°C, and stir to react After about 1 hour, when the solid matter is completely dissolved, the system turns light yellow; raise the temperature of the system to 105°C, maintain a constant temperature, stir with a stirrer for 2.5-3 hours, cool down and discharge to obtain the rust conversion agent.

example 2

[0052] Synthesis of rust converting agent: Add 27g of 1-2 propylene glycol in a four-neck flask and place it in a cold water bath, add 6.75g of gallic acid and 0.7g of p-toluenesulfonic acid in proportion under stirring conditions, raise the temperature of the water bath to 75°C, and stir for 1h After the solid material is completely dissolved, the system turns light yellow; raise the temperature of the system to 110°C, maintain a constant temperature, stir with a stirrer for 2.5-3 hours, cool down to room temperature and discharge to obtain the rust conversion agent.

example 3

[0054] Preparation of water-based rust conversion primer: add 22.0g deionized water to a beaker, add 9.0g aluminum tripolyphosphate, 9.0g sericite, 4.0g talcum powder, 2.0g barium sulfate and 1.5g nano-silica in turn under stirring , evenly dispersed and ground on the equipment until the particle size is less than 20 microns, the resulting pigment paste. Add 48.0g of vinylidene chloride composite polymer emulsion into the beaker, add 1.0g of ethylene glycol butyl ether under stirring, add 2.0g of PH regulator after stirring, and stir evenly; add the above-mentioned pigment filler slurry into the emulsion, stir About 15 minutes, add 1.5g of the rust conversion agent prepared in Example 2, add an appropriate amount of defoamer depending on the bubbles during the stirring process, add an appropriate amount of thickener to thicken, and stir for 30 minutes. A water-based rust conversion primer that can be painted with rust is obtained.

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Abstract

The invention belongs to the technical field of a metal anti-corrosion coating, and particularly relates to a rust transforming agent and a preparation method thereof, a water-based iron rust conversion coating and a preparation method thereof. The rust transforming agent comprises a step of synthesizing 2-hydroxypropyl 3,4,5-trihydroxybenzoic acid by taking a gallic acid, 1,2-propylene glycol and a p-toluenesulfonic acid as initial raw materials, wherein the rust transforming agent contains 18.5-26.7% of gallic acid, 66.6-74% of 1,2-propylene glycol, and 6.6-7.5% of p-toluenesulfonic acid; the water-based iron rust conversion coating is prepared from a vinylidene chloride composite polymer emulsion, ethylene glycol butyl ether, filling slurry prepared in the step (1) and the rust transforming agent. The prepared rust transforming agent disclosed by the invention is good in water tolerance, strong in stability, and good in matching property with a water paint and an oil paint.

Description

technical field [0001] The invention belongs to the technical field of metal anticorrosion coatings, and specifically relates to a rust conversion agent and a preparation method thereof, a water-based rust conversion primer and a preparation method thereof. Background technique [0002] Corrosion is everywhere and everywhere. According to statistics, the economic loss caused by corrosion in my country is 3% to 5% of the GDP of the year. In 2012, the loss caused by corrosion in my country was 2 trillion to 2.5 trillion yuan. According to the calculation of the consumption of 1 ton of standard coal per 10,000 yuan of GDP, the energy loss caused by corrosion is about 200 million tons of standard coal. In addition, at present, about 2 / 3 of the pressure vessel explosion accidents and more than 90% of the various underground pipeline ruptures in China are caused by corrosion; In the accident, corrosion was also an important reason; the collapse of the Missouri Interstate Bridge in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/02C09D127/08C09D7/12C09D5/08
Inventor 葛圣松李建峰王俊祥张绘新邵谦
Owner SHANDONG UNIV OF SCI & TECH
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