Environment friendly gas phase corrosion inhibitor used for direct air cooling system

A gas-phase corrosion inhibitor and air cooling system technology, which is applied in the field of environment-friendly gas-phase corrosion inhibitor, can solve the problems such as the harm to the human body of the corrosion inhibitor and the difficulty of popularization for users, and achieve the effects of corrosion prevention, long-lasting efficacy and high corrosion inhibition efficiency.

Inactive Publication Date: 2010-08-11
SHAANXI ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned corrosion inhibitors are difficult to populariz

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1:

[0017] Take 40 parts of hexamethylenetetramine, 20 parts of ammonium carbonate, 20 parts of sodium benzoate, and 20 parts of sodium D-isoascorbate, and mix them uniformly under dry conditions to form a gas phase corrosion inhibitor. The carbon steel test piece was placed in 10% sodium chloride vapor at 60°C for 209 hours, and the corrosion inhibition efficiency reached 93.97%.

Example Embodiment

[0018] Example 2:

[0019] Take 20 parts each of hexamethylenetetramine and thiourea; 15 parts each of diammonium hydrogen phosphate and ammonium carbonate, 10 parts of sodium benzoate, and 20 parts of sodium D-isoascorbate, and mix them uniformly under dry conditions to form a gas phase corrosion inhibitor. agent. The carbon steel test piece was placed in 10% sodium chloride vapor at 60°C for 209 hours, and the corrosion inhibition efficiency reached 90.71%.

[0020] Example 2:

[0021] Take 20 parts of hexamethylenetetramine, thiourea and carbonamide; 10 parts of ammonium carbonate, 10 parts of sodium benzoate, and 20 parts of D-sodium erythorbate, and mix them uniformly under dry conditions to form a gas phase corrosion inhibitor . The carbon steel test piece was placed in 10% sodium chloride vapor at 60°C for 209 hours, and the corrosion inhibition efficiency reached 97.07%.

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PUM

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Abstract

The invention discloses an environment friendly gas phase corrosion inhibitor used for a direct air cooling system, which consists of the following materials in percentage by weight: 30-40% of organic amine, 20-30% of inorganic ammonium, 20-30% of sodium benzoate and 10-20% of sodium D-isoascorbate, wherein the organic amine is hexamethylentertr-amine, thiourea or carbamide, and the inorganic ammonium is diammonium phosphate, ammonium bicarbonate or ammonium carbonate. The sodium benzoate is commonly used for food preservatives; the diammonium phosphate is used for medicine, feed additives and the like; and the sodium D-isoascorbate is a novel food anti-oxygen and antiseptic fresh-keeping auxochromic agent; and the other components have very low toxicity or have no toxicity. The corrosion inhibitor has no harm on the environment and human body, has the advantages of convenient manufacturing and use, environment protection, high corrosion inhibition efficiency, long-lasting efficacy and the like, and can effectively prevent the direct air cooling system from being corroded.

Description

technical field [0001] The invention belongs to the production technical field of anticorrosion preparations, and relates to an environment-friendly gas phase corrosion inhibitor used to prevent direct air cooling systems of thermal power plants. Background technique [0002] Coal resources are abundant in northern my country, but water resources are relatively scarce, which is suitable for the promotion and application of direct air-cooled thermal power generating units. Practice has shown that after the direct air cooling system is out of service, the internal water vapor will severely corrode the steel material on the inner surface of the air cooling tower. After the unit is started, before and after hot flushing and flushing, the condensed water turns red and yellow, and the iron ion content can reach up to about 600-800ug / L, resulting in prolonged flushing time and greater loss of fuel and desalted water. [0003] Vapor phase inhibitor (Vapor phase inhibitor, VCI), als...

Claims

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Application Information

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IPC IPC(8): C23F11/02
Inventor 闫爱军姜丹丁德
Owner SHAANXI ELECTRIC POWER RES INST
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