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Preparation method of composite corrosion inhibitor

A rust inhibitor and composite technology, which is applied in the field of preparation of composite rust inhibitors, can solve the problems of weak steel-concrete protection ability, single rust inhibitor composition, poor rust inhibition effect, etc., and achieve a wide film coverage area , ideal anti-rust effect

Inactive Publication Date: 2022-01-14
GUIZHOU DR SHI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new composite rust inhibitor with good synergy between organic and inorganic components, which can promote the durability of steel-concrete, so as to solve the problems of rust inhibitors on the market with single components and rust inhibitors. The effect is poor and the protection ability of steel-concrete is weak in the later stage.

Method used

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  • Preparation method of composite corrosion inhibitor
  • Preparation method of composite corrosion inhibitor
  • Preparation method of composite corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: the preparation method of this composite rust inhibitor is realized according to the following steps:

[0034] Step 1: First add 70g of water into the reactor, heat to 55°C and keep the solution at this temperature;

[0035] Step 2: Turn on the agitator, add 4g of ammonium molybdate into the reaction kettle to dissolve for 10min, then add 5g of sodium tetraborate, and after 10min, add 3g of sodium sulfamate to accelerate stirring for 10min;

[0036] Step 3: turn off the heater and add 12g of isobutanolamine after the temperature drops to normal temperature;

[0037] Step 4: After 15 minutes, add 6 g of diethanol monoisopropanolamine and continue to stir for half an hour, then turn off the stirring to obtain a new composite rust inhibitor with a concentration of 30 g / L.

Embodiment 2

[0038] Embodiment 2: the preparation method of this composite rust inhibitor is realized according to the following steps:

[0039] Step 1: First add 64g of water into the reactor, heat to 55°C and keep the solution at this temperature;

[0040] Step 2: Turn on the agitator, add 5g of ammonium molybdate into the reaction kettle to dissolve for 10min, then add 6g of sodium tetraborate, and after 10min, add 4g of sodium sulfamate to accelerate stirring for 10min;

[0041] Step 3: turn off the heater and add 13g of isobutanolamine after the temperature drops to normal temperature;

[0042] Step 4: After 15 minutes, add 8 g of diethanol monoisopropanolamine and continue to stir for half an hour, then turn off the stirring to obtain a new composite rust inhibitor with a concentration of 35 g / L.

Embodiment 3

[0043] Embodiment 3: the preparation method of this composite rust inhibitor is realized according to the following steps:

[0044] Step 1: First add 58g of water into the reactor, heat to 55°C and keep the solution at this temperature;

[0045] Step 2: Turn on the agitator, add 6g of ammonium molybdate into the reaction kettle to dissolve for 10min, then add 7g of sodium tetraborate, and after 10min, add 5g of sodium sulfamate to accelerate stirring for 10min;

[0046] Step 3: turn off the heater and add 14g of isobutanolamine after the temperature drops to normal temperature;

[0047] Step 4: After 15 minutes, add 10 g of diethanol monoisopropanolamine and continue to stir for half an hour, then turn off the stirring to obtain a new composite rust inhibitor with a concentration of 30 g / L.

[0048] The steel bar was immersed in the concrete simulation solution with a pH of 12.12 for 180 days to simulate the process of the steel bar forming a stable passivation film in the ac...

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Abstract

The invention relates to the technical field of building materials, and particularly discloses a preparation method of a composite corrosion inhibitor. The corrosion inhibitor comprises the following components in percentage by weight: 5%-7% of sodium tetraborate, 3%-5% of sodium sulfamate, 4%-6% of ammonium molybdate, 12%-14% of isobutanol amine, 6%-10% of diethanolisopropanolamine and 58%-70% of water. The preparation method comprises the steps of weighing according to the ratio of the raw materials, firstly adding water into a reaction kettle, heating to the temperature of 50-55 DEG C, starting a stirrer, adding ammonium molybdate into the reaction kettle, dissolving for 10 minutes, then adding sodium tetraborate, adding sodium sulfamate after 10 minutes, accelerating stirring for 10 minutes, turning off a heater, adding isobutanol amine after the temperature is reduced to normal temperature, adding diethanolisopropanolamine after 15 minutes, continuously stirring for half an hour, and stopping stirring so as to obtain the novel composite corrosion inhibitor with the concentration of 30g / L to 42g / L. The composite corrosion inhibitor can effectively prolong the durability of reinforced concrete, and can be widely used in ocean engineering, civil buildings and high saline and alkaline areas.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a preparation method of a composite rust inhibitor. Background technique [0002] Reinforced concrete structures can give full play to the advantages of both steel and concrete to bear external loads, and are widely used in civil engineering structures such as medium and high-rise buildings, long-span bridges, tunnels, and subways. In these civil engineering structures, the durability of concrete is particularly critical, often directly determining the service life of the building. The durability of reinforced concrete is a problem faced by the whole world. Steel corrosion, chemical corrosion, concrete carbonation, freeze-thaw damage, alkali-aggregate reaction, etc. will cause insufficient structural durability, but the main reason for accelerated concrete damage is steel corrosion. . [0003] At present, there are many technical measures to prevent the corrosion of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B103/61
CPCC04B40/0039C04B2103/61C04B22/0013C04B22/14C04B22/08C04B24/122
Inventor 龙潇陈杰田应兵邓妮方世昌
Owner GUIZHOU DR SHI TECH