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A kind of carbon steel corrosion inhibitor and preparation method thereof

A corrosion inhibitor and carbon steel technology, applied in the field of corrosion inhibitors, can solve the problems of waste of resources, affecting the normal operation of the device, etc., and achieve the effects of corrosion inhibition, good environmental protection performance, and good compatibility effect

Active Publication Date: 2020-06-09
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If these problems cannot be solved in time, it will inevitably affect the normal operation of the device and cause waste of resources

Method used

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  • A kind of carbon steel corrosion inhibitor and preparation method thereof
  • A kind of carbon steel corrosion inhibitor and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method of a carbon steel corrosion inhibitor, comprising the following steps: after rinsing the reaction kettle and the head tank, 100kg of sodium stearate will be dissolved in 150kg of heated pure water under the condition of constant stirring; into the head tank 1; dissolve 140kg of triethanolamine in 70kg of pure water, and pump it into the head tank 2 by vacuum; add 250kg of propynyl alcohol, 50kg of concentrated sulfuric acid and the remaining 240kg of pure water into the reactor, and the reactor After the internal temperature rises to 62°C, put the sodium stearate aqueous solution in the head tank 1 into the reaction kettle at one time, and after half an hour, start to add the triethanolamine aqueous solution in the head tank 2 dropwise, the time is controlled at 5.5 hours, and the titration is completed. Insulate at 72°C for 2.5 hours, cool down to room temperature, discharge, and obtain.

Embodiment 2

[0038] A preparation method of a carbon steel corrosion inhibitor, comprising the following steps: after rinsing the reaction kettle and the head tank, 125kg of sodium stearate will be dissolved in 180kg of heated pure water under the condition of constant stirring; 120kg of triethanolamine is dissolved in 50kg of pure water, and pumped into the high-level tank 2 by vacuum; 220kg of propynyl alcohol, 50kg of concentrated sulfuric acid and the remaining 255kg of pure water are added to the reactor, and the reactor After the internal temperature rises to 64°C, put the sodium stearate aqueous solution in the head tank 1 into the reaction kettle at one time, and after half an hour, start to drop the triethanolamine aqueous solution in the head tank 2, and the time is controlled at 6.0 hours, and the titration is completed. Insulate at 74°C for 2.4 hours, cool down to room temperature, discharge, and obtain.

Embodiment 3

[0040] A preparation method of a carbon steel corrosion inhibitor, comprising the following steps: after rinsing the reaction kettle and the head tank, 150kg of sodium stearate will be dissolved in 200kg of heated pure water under the condition of constant stirring, and the into the head tank 1; dissolve 100kg of triethanolamine in 60kg of pure water, and pump it into the head tank 2 through vacuum; add 170kg of propynyl alcohol, 50kg of concentrated sulfuric acid and the remaining 270kg of pure water into the reactor, and the reactor After the internal temperature rises to 65°C, put the sodium stearate aqueous solution in the head tank 1 into the reaction kettle at one time, and after half an hour, start to drop the triethanolamine aqueous solution in the head tank 2, and the time is controlled at 5.8 hours, and the titration is completed. Insulate at 73°C for 2.6 hours, cool down to room temperature, discharge, and obtain.

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Abstract

The invention discloses carbon steel corrosion inhibitor and a preparing method thereof. The carbon steel corrosion inhibitor is prepared by raw materials, by weight part, 1.5 to 2.5 parts of propargyl alcohol, 0.5 to 1.5 parts of sodium stearate, 1.0 to 1.8 parts of triethanolamine, 0.3 to 0.8 part of concentrated sulfuric acid and 4 to 6 parts of water. The carbon steel corrosion inhibitor is high in corrosion inhibitor rate, small in adding amount, good in environment-friendly property and good in matching effect.

Description

technical field [0001] The invention belongs to the technical field of corrosion inhibitors, and in particular relates to a novel carbon steel corrosion inhibitor and a preparation method thereof. Background technique [0002] In modern industrial production, problems such as the formation of metal scale during heat treatment or hot rolling, the formation of rust scales during the operation of boilers and heat exchangers, and the formation of material scales on material conveying pipes and reactors are often encountered. . If these problems cannot be solved in time, it will inevitably affect the normal operation of the device and cause waste of resources. Carbon steel has good mechanical properties and process properties, and is cheap, so it is more and more widely used in various industries. In the process of product processing and application, dilute sulfuric acid or dilute hydrochloric acid is often used for pickling, which can remove the oxide film or corrosion product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/06C23G1/08
CPCC23G1/061C23G1/081
Inventor 刘晓民胡新霞高云峰王俊明梁清雷王金明张雷张少蔚苗吉宾郑萍
Owner SHANDONG TIANQING TECH DEV