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Carbon steel and aluminum corrosion inhibitor

An aluminum corrosion inhibitor and corrosion inhibitor technology, applied in the field of metal anti-corrosion, can solve environmental pollution and other problems, achieve the effects of reducing corrosion current, increasing anodic polarization potential, and wide pH range

Inactive Publication Date: 2021-02-19
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most inorganic corrosion inhibitor formulations for carbon steel and aluminum contain oxidizing inorganic salts and phosphorus-containing inorganic salts, which will pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0012] Embodiment: In this embodiment, a carbon steel and aluminum corrosion inhibitor includes a solute and a solvent, the solvent is water, the solute and its concentration are as follows: sodium alginate 5 mg / L, benzaldehyde 3 mg / L, hydrazine 2 mg / L. Weigh the sodium alginate of the formulated amount, add the formulated amount of water, stir while adding, heat to 50°C and stir for 30 minutes to dissolve completely. Add formula amount of benzaldehyde and hydrazine to the obtained solution, and stir evenly.

[0013] The performance of the corrosion inhibitor was measured by the rotating coupon method. Test conditions: 1. Test temperature 45°C±1°C; 2. Test material Q235 steel, aluminum; 3. Coupon line speed 0.4m / s-0.6m / s; test cycle 72h.

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PUM

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Abstract

The invention discloses a carbon steel and aluminum corrosion inhibitor, belongs to the technical field of metal corrosion prevention, and can be used for indirect air cooling unit circulating coolingwater treatment. The corrosion inhibitor is an aqueous solution and contains 2 mg / L to 20 mg / L of sodium alginate, 2 mg / L to 20 mg / L of benzaldehyde and 1 mg / L to 3 mg / L of hydrazine. After formula components of the corrosion inhibitor are mixed, a good synergistic effect is achieved, and a good corrosion inhibition effect is achieved on carbon steel and aluminum.

Description

technical field [0001] The invention relates to a corrosion inhibitor for carbon steel and aluminum, belonging to the technical field of metal anticorrosion. Background technique [0002] The indirect air-cooling system with the main purpose of saving water has been widely used in thermal power plants abroad and in water-scarce areas in northern my country, and has achieved good water-saving effects. The indirect air-cooling system is huge, with both carbon steel water pipes and aluminum cooling pipes. Although the indirect air-cooling circulating water uses high-quality desalinated water, with the extension of operation time, most power plants have problems due to Corrosion caused by deterioration of water quality leads to high iron and aluminum content in circulating water, and even causes production accidents such as pipeline leakage. Therefore, it is imperative to study the corrosion inhibitor formula under the coexistence of carbon steel and aluminum. [0003] At pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/08
CPCC23F11/08
Inventor 孟龙黄万启龙国军王宁飞张维科李俊菀
Owner XIAN THERMAL POWER RES INST CO LTD
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