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Carboxymethyl chitosan oligosaccharide schiff base organic carbon steel seawater corrosion inhibitor and application thereof

A technology of carboxymethyl chitosan oligosaccharide and corrosion inhibitor, which is applied in the field of steel seawater corrosion inhibitor, can solve problems such as adverse effects of production process, polluted products, etc., and achieves inhibition of excessive corrosion, strong continuous action ability, and cheap and easy raw materials. the effect

Inactive Publication Date: 2011-03-23
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In recent years, studies on the mechanism of organic corrosion inhibitors have shown that if organic molecules contain atoms such as O, N, S, P, etc., unsaturated bonds or large conjugated systems with high electronegativity, generally speaking It has good corrosion inhibition effect, so organic corrosion inhibitors develop rapidly and are widely used, but the use of these corrosion inhibitors will also have disadvantages, such as possible pollution of products and adverse effects on production processes, etc., so the development of green environmental protection Type organic corrosion inhibitors have become a research hotspot in recent years

Method used

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  • Carboxymethyl chitosan oligosaccharide schiff base organic carbon steel seawater corrosion inhibitor and application thereof
  • Carboxymethyl chitosan oligosaccharide schiff base organic carbon steel seawater corrosion inhibitor and application thereof
  • Carboxymethyl chitosan oligosaccharide schiff base organic carbon steel seawater corrosion inhibitor and application thereof

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Experimental program
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Effect test

Embodiment 1

[0025] The medium is 3.5% NaCl solution, the amount of medium is 500ml, 400mg of carboxymethylchitooligosaccharide aroxalin Schiff base (concentration is 800mg / L) is added, and the carbon steel is immersed in the medium for 15d at room temperature.

[0026] The highest corrosion inhibition efficiency obtained through experimental testing is 82.54%, which shows that it is an efficient corrosion inhibitor for organic matter.

[0027] According to the above operation process, the corrosion inhibition efficiencies of different concentrations of carboxymethylated chitosan oxalin Schiff base were determined as follows:

[0028]

Embodiment 2

[0030] The medium is sea water, the medium dosage is 500ml, 400mg carboxymethyl chitosan oxalin Schiff base is added, and the carbon steel to be prepared is immersed in the medium for 15 days at room temperature. Submerge carbon steel in this medium for 15 days at room temperature.

[0031] The highest corrosion inhibition efficiency obtained through experimental testing is 81.90%, which shows that it is an efficient corrosion inhibitor for organic matter.

Embodiment 3

[0033] The medium is 3.5% NaCl solution, the amount of the medium is 500ml, 1000mg of disodium hydrogen phosphate is added, and the carbon steel to be treated is immersed in the medium for 15 days at room temperature.

[0034] The highest corrosion inhibition efficiency obtained through experimental testing is 90.09%, which is an efficient corrosion inhibitor for inorganic corrosion inhibitors.

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Abstract

The invention relates to a steel (carbon steel) seawater corrosion inhibitor, in particular to a carboxymethyl chitosan oligosaccharide schiff base organic carbon steel seawater corrosion inhibitor and application thereof. The corrosion inhibitor comprises components of one or two of highly water soluble carboxymethyl chitosan oligosaccharide schiff base, disodium hydrogen phosphate and mixture of highly water soluble carboxymethyl chitosan oligosaccharide schiff base and disodium hydrogen phosphate. The corrosion inhibitor in the invention can effectively prevent seawater from corroding carbon steel and has the greatest advantages of small used amount, high corrosion inhibition efficiency and long acting time. The product in the invention is an 'environmentally-friendly' green corrosion inhibitor, has a wide source range and has a promising market prospect and a high application value.

Description

technical field [0001] The invention relates to seawater corrosion inhibitors for steel products, specifically a carboxymethyl chitooligosaccharide Schiff base inhibitor used to prevent carbon steel and its products from corrosion of carbon steel materials in harsh seawater environments and excessive consumption of corrosion inhibitors. etchant and its application. Background technique [0002] Seawater is a valuable natural resource, but natural seawater will inevitably involve the corrosion of metal equipment such as carbon steel in all fields of utilization. There are many ways to protect metal equipment in seawater environment. Adding corrosion inhibitor is a measure with simple process, low cost and strong applicability. [0003] In recent years, studies on the mechanism of organic corrosion inhibitors have shown that if organic molecules contain atoms such as O, N, S, P, etc., unsaturated bonds or large conjugated systems with high electronegativity, generally speakin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/14
CPCC23F11/146C23F11/173
Inventor 李伟华李云菊张胜涛曹琨侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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