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Application of pyridoxine as seawater rust inhibitor

A technology of pyridoxine and rust inhibitor, which is applied in the application field of pyridoxine as a seawater rust inhibitor, can solve the problems of anti-corrosion performance index, zero pollutant discharge and massive discharge, which cannot be taken into account, and achieve excellent rust resistance and long-term effect. Long-lasting, low-cost effects

Inactive Publication Date: 2014-01-15
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic rust inhibitors currently occupying a major market share, such as amines, alcohol amines and fatty acids, still have anti-corrosion performance indicators and zero pollutant discharge according to the requirements of sustainable recycling of marine resources in the "China Marine Environmental Quality Bulletin" Unable to make overall plans, non-toxic and environmental protection has thus become an unavoidable bottleneck restricting the development of rust inhibitors in the future

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Conditions: The experimental material is carbon steel (Fe: 99.5%, Mn: 0.4-0.5%, C: 0.1-0.2%), the effective rust inhibitor is pyridoxine, the medium is 3.5% sodium chloride solution, and the dosage is 100L. The effective content of adding pyridoxine is 2g, the temperature is 25°C, pH=9.5, and the immersion time is 60 days.

[0028] The rust inhibition efficiency obtained through the experimental test is 82.4% in weight loss, 83.5% in electrochemical impedance spectroscopy, and 83.5% in dynamic potential polarization curve, indicating that the compound is a rust inhibitor with low dosage and high efficiency.

Embodiment 2

[0030] Conditions: The experimental material is carbon steel (Fe: 99.5%, Mn: 0.4-0.5%, C: 0.1-0.2%), the effective rust inhibitor is pyridoxine, the medium is 3.5% sodium chloride solution, and the dosage is 100L. The effective content of adding pyridoxine is 4g, the temperature is 25°C, pH=9.5, and the immersion time is 60 days.

[0031] The rust inhibition efficiency obtained through the experimental test is 86.8% in weight loss, 87.2% in electrochemical impedance spectroscopy, and 87.9% in dynamic potential polarization curve, which shows that the compound is a rust inhibitor with low dosage and high efficiency.

Embodiment 3

[0033] Conditions: The experimental material is carbon steel (Fe: 99.5%, Mn: 0.4-0.5%, C: 0.1-0.2%), the effective rust inhibitor is pyridoxine, the medium is 3.5% sodium chloride solution, and the dosage is 100L. The effective content of adding pyridoxine is 8g, the temperature is 25°C, pH=9.5, and the immersion time is 60 days.

[0034] The antirust efficiency obtained through the experimental test is 90.9% in weight loss, 92.7% in electrochemical impedance spectroscopy, and 93.7% in dynamic potential polarization curve, indicating that the compound is a rust inhibitor with low dosage and high efficiency.

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Abstract

The invention relates to a rust inhibitor for, in concrete environment or corresponding alkaline conditions, corrosion inhibition of steel (carbon steel) in seawater or a sodium chloride solution, and particularly relates to the application of pyridoxine as a seawater rust inhibitor in the concrete alkaline environment or corresponding alkaline conditions. The rust inhibitor is applied in the concrete alkaline environment or corresponding alkaline conditions for corrosion prevention of carbon steel materials and steel bar products thereof in the seawater or a sodium chloride medium, and the rust inhibitor of the invention is less in use amount, wide in source, non-toxic, green and environmentally friendly, high in efficiency, strong in continuous function ability, can effectively inhibit corrosion destruction of the carbon steel, and has substantial application values and broad market prospects.

Description

technical field [0001] The invention relates to a kind of antirust agent which can inhibit the corrosion of steel (carbon steel) in seawater or sodium chloride solution under concrete environment or corresponding alkaline conditions, specifically a kind of pyridoxine as seawater antirust agent Application in concrete alkaline environment or corresponding alkaline conditions. Background technique [0002] Based on the needs of ecological environment protection and sustainable development of marine resources, reinforced concrete rust inhibitors not only require low cost, stable and efficient anti-corrosion effect and safe and convenient management and use methods, but also adapt to the requirements of green chemistry in the application and development process. Requirements to reduce the environmental load of products. [0003] Traditional high-efficiency inorganic rust inhibitors for reinforced concrete, such as phosphates, chromates and nitrous acid-based products, are liste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/06C23F11/14
Inventor 田惠文李伟华郑海兵侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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