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A high-performance sealed environment-friendly carbon steel corrosion inhibitor and its preparation and application

A corrosion inhibitor, an environmentally friendly technology, applied in the field of corrosion inhibitors for circulating chilled water, to achieve the effects of excellent corrosion inhibition performance, wide pH adaptability, and simple preparation methods

Active Publication Date: 2017-07-18
SHANGHAI YIKE GREEN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking the most commonly used nitrite corrosion inhibitor as an example, if it is added alone, the dosage needs to be more than 800mg / L to ensure the corrosion inhibition effect. If the system needs sewage treatment for some reason, it will bring huge pressure to the environment

Method used

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  • A high-performance sealed environment-friendly carbon steel corrosion inhibitor and its preparation and application
  • A high-performance sealed environment-friendly carbon steel corrosion inhibitor and its preparation and application
  • A high-performance sealed environment-friendly carbon steel corrosion inhibitor and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] To prepare 100kg of environment-friendly carbon steel corrosion inhibitor, the preparation process: first add 8kg of gluconate and 9kg of lignosulfonate into the container, then add 5kg of sarcosinate, 3kg of green and environment-friendly polymer, 75kg water, and mix well to obtain a brown liquid.

[0021] The sarcosinate is selected from sodium sarcosinate.

[0022] The green environment-friendly polymer is polyepoxysuccinic acid.

[0023] Described gluconate is sodium gluconate.

[0024] The lignosulfonate is sodium lignin.

[0025] Referring to "GB / T 18175-2000 Determination of Corrosion Inhibition Performance of Water Treatment Agents by Rotating Coupon Method", the measured corrosion rate of carbon steel coupons is 0.0024mm / a, and the corrosion inhibition rate is 98.96%.

Embodiment 2

[0027] To prepare 100kg of environment-friendly carbon steel corrosion inhibitor, the preparation process: first add 7kg of gluconate and 8kg of lignosulfonate into the container, then add 30kg of sarcosinate, 2kg of green environment-friendly polymer, 53kg water, and mix well to obtain a brown liquid.

[0028] The sarcosinate is selected from potassium sarcosinate.

[0029] The green environment-friendly polymer is polyaspartic acid.

[0030] Described gluconate is potassium gluconate.

[0031] The lignosulfonate is potassium lignin.

[0032] Referring to "GB / T 18175-2000 Determination of Corrosion Inhibition Performance of Water Treatment Agents by Rotary Coupon Method", the measured corrosion rate of carbon steel coupons is 0.0008mm / a, and the corrosion inhibition rate is 99.65%.

Embodiment 3

[0034] To prepare 100kg of environment-friendly carbon steel corrosion inhibitor, the preparation process: first add 6kg of gluconate and 8kg of lignosulfonate into the container, then add 26kg of sarcosinate, 2kg of green environment-friendly polymer, 58kg water, and mix well to obtain a brown liquid.

[0035] The sarcosinate is selected from potassium sarcosinate.

[0036] The green environment-friendly polymer is polyepoxysuccinic acid.

[0037] Described gluconate is sodium gluconate.

[0038] The lignosulfonate is sodium lignin.

[0039] Referring to "GB / T 18175-2000 Determination of Corrosion Inhibition Performance of Water Treatment Agents by Rotary Coupon Method", the measured corrosion rate of carbon steel coupons is 0.0009mm / a, and the corrosion inhibition rate is 99.61%.

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Abstract

The invention discloses a high-performance, closed and environment-friendly carbon steel corrosion inhibitor. With the total mass of the corrosion inhibitor as a benchmark, besides water, the corrosion inhibitor further comprises the following raw material components in percentage by weight: 1-30% of sarcosinate, 1-10% of environment-friendly polymer, 1-10% of gluconate, 1-5% of lignin and the balance of water. The high-performance, closed and environment-friendly carbon steel corrosion inhibitor disclosed by the invention is suitable for corrosion inhibition treatment of carbon steel pipelines of closed circulating refrigerated water systems, and can effectively reduce the corrosion rate of the carbon steel material and well protect the carbon steel pipelines; the formula is environmentally friendly and is biodegradable, and system drain contamination is not worsen water body pollution, thereby reducing the sewage treatment cost and conforming to the current general trend of environmental protection development.

Description

technical field [0001] The invention relates to the field of chemical engineering water treatment agents, in particular to a corrosion inhibitor for circulating frozen water. Background technique [0002] Carbon steel is one of the most widely used materials in industrial equipment. This is because it is cheap and easy to obtain, has high mechanical strength, good thermal conductivity and heat resistance, and excellent processing and welding performance. It is used in industrial circulating water Heat exchangers and pipe networks in many installations are made of carbon steel. At present, the research on carbon steel corrosion is relatively in-depth. The main factors affecting carbon steel corrosion in industrial circulating chilled water systems are PH, temperature, dissolved oxygen and water flow rate, etc., which can easily cause local corrosion and uniform corrosion of carbon steel materials. The consequences of corrosion are more serious. If the corrosion is not contro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/14
Inventor 汪晓雷王海平宋力施沛颖
Owner SHANGHAI YIKE GREEN ENG
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