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Environment-friendly composite corrosion and scale inhibitor and preparation method and use method thereof

A corrosion and scale inhibitor, an environmentally friendly technology, applied in the field of environmentally friendly composite corrosion and scale inhibitors, to achieve excellent penetration and wetting effects

Inactive Publication Date: 2019-08-09
CHANGZHOU JINGKE XIAFENG FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This conflicts with the use of inorganic zinc salt corrosion inhibitors in water bodies to control equipment corrosion inhibition

Method used

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  • Environment-friendly composite corrosion and scale inhibitor and preparation method and use method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] According to the above preparation method, an environment-friendly composite corrosion and scale inhibitor is prepared, wherein the weight percentage of each component consists of: sodium gluconate 75%, high-efficiency phosphorus-free corrosion inhibitor NPAA-21 (fatty acid polyoxyethylene ether and secondary alkyl sulfonate Sodium acid compound) 11%, the balance is deionized water.

[0024] Using "GBT 18175-2000 Determination of Corrosion Inhibition Performance of Water Treatment Agents by Rotary Coupon Method" and "GBT 16632-2008 Determination of Scale Inhibition Performance of Water Treatment Agents by Calcium Carbonate Deposition Method" to evaluate its corrosion and scale inhibition performance, The dosing concentration of the environment-friendly composite corrosion and scale inhibitor is 80ppm, the corrosion rate of carbon steel is 0.04788mm / a, the screw mouth of the test piece is slightly corroded, and the rest of the surface is bright, with less powdery sediment...

Embodiment 2

[0026] According to the above-mentioned preparation method, an environment-friendly composite corrosion and scale inhibitor is prepared, wherein the weight percentage of each component is composed of: sodium gluconate 37%, disodium edetate 30%, high-efficiency phosphorus-free corrosion inhibitor NPAA-1 ( Fatty acid polyoxyethylene ether and secondary alkyl sodium sulfonate) 15%, the balance is deionized water.

[0027] Using "GBT 18175-2000 Determination of Corrosion Inhibition Performance of Water Treatment Agents by Rotary Coupon Method" and "GBT 16632-2008 Determination of Scale Inhibition Performance of Water Treatment Agents by Calcium Carbonate Deposition Method" to evaluate its corrosion and scale inhibition performance, The dosing concentration of the environment-friendly compound corrosion and scale inhibitor is 93ppm, the corrosion rate of carbon steel is 0.03986mm / a, the screw mouth of the test piece is slightly corroded, and the rest of the surface is bright, with l...

Embodiment 3

[0029] According to the above preparation method, an environment-friendly composite corrosion and scale inhibitor is prepared, wherein the weight percentage of each component is composed of: sodium gluconate 10%, disodium edetate 5%, acrylic acid-2-acrylamide-2-methanol Propylene sulfonic acid copolymer 35%, high-efficiency phosphorus-free corrosion inhibitor NPAA-1 (compound of fatty acid polyoxyethylene ether and secondary alkyl sodium sulfonate) 18% and benzotriazole 1%, the balance is Deionized water.

[0030] Using "GBT 18175-2000 Determination of Corrosion Inhibition Performance of Water Treatment Agents by Rotary Coupon Method" and "GBT 16632-2008 Determination of Scale Inhibition Performance of Water Treatment Agents by Calcium Carbonate Deposition Method" to evaluate its corrosion and scale inhibition performance, The dosing concentration of the environment-friendly compound corrosion and scale inhibitor is 105ppm, the corrosion rate of carbon steel is 0.02048mm / a, th...

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Abstract

The invention discloses an environment-friendly composite corrosion and scale inhibitor and a preparation method and use method thereof. The environment-friendly composite corrosion and scale inhibitor is prepared from, by weight percentage, 37-75% of a phosphorus-free and zinc-free scale inhibitor, 10-22% of a phosphorus-free and zinc-free corrosion inhibitor and the balance deionized water, wherein the phosphorus-free and zinc-free scale inhibitor is one or more of sodium gluconate, disodium ethylene diamine tetraacetate or an acrylic acid-2-acrylamide-2-methallyl sulfonate copolymer, and the phosphorus-free and zinc-free corrosion inhibitor is a compound of fatty acid polyoxyethylene ether and secondary alkyl sodium sulfonate. The composite corrosion and scale inhibitor does not containphosphorus and zinc, environmental pollution caused by phosphorus or zinc in water is avoided, and the requirement of environmental protection is met. Moreover, the preparation method and use methodof the environment-friendly composite corrosion and scale inhibitor are simple, and the environment-friendly composite corrosion and scale inhibitor is conveniently prepared and applied.

Description

technical field [0001] The invention relates to the technical field of corrosion and scale inhibitors, in particular to an environment-friendly composite corrosion and scale inhibitor, a preparation method and a use method. Background technique [0002] The circulating cooling system is the most common and commonly used cooling method in the industrial production process, and water is usually used as the cooling medium, but during operation, due to the continuous concentration of various ions in the water body and the presence of dissolved oxygen, scaling and corrosion will occur The problem caused by the heat exchange performance of the heat exchange equipment is reduced, thus affecting the production. [0003] Dosing composite corrosion and scale inhibitors is the best way to reduce scaling and corrosion failures. In the circulating water treatment chemicals, inorganic phosphorus-accumulating agents were initially used, but this agent is prone to calcium phosphate precipi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/12C02F103/02
CPCC02F5/105C02F5/125C02F2103/023C02F2303/08
Inventor 杨继陈东华马群王海宁
Owner CHANGZHOU JINGKE XIAFENG FINE CHEM
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