Green sodium alginate corrosion inhibitor for carbon steel neutral medium and application thereof

The technology of sodium alginate and neutral medium is applied in the field of corrosion inhibitor for neutral medium of green sodium alginate carbon steel, which can solve the problems of toxic and side effects, poor environmental friendliness, etc. Low dosage effect
CN102140641AInactive Publication Date: 2011-08-03INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
Publication Date
2011-08-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a corrosion inhibitor for a steel neutral medium, particularly relating to a green sodium alginate corrosion inhibitor for a carbon steel neutral medium as well as an application thereof. The corrosion inhibitor is sodium alginate of which the chemical general formula is (C6H7NaO6)n and the average molecular weight (Mw) is 20000-100000. The sodium alginate corrosion inhibitor disclosed by the invention is a natural product extracted from brown algae, and is widely applied to food industry. The corrosion inhibitor is a copolymer formed by connecting alpha-L-mannuronic acid (M units) with beta-D-guluronic acid through 1,4-glucosidic bonds and composed of different GGGMMM fragments. The alpha-L-mannuronic acid unit contains a large amount of carboxyl and can be coordinated with metals. Compared with the current commonly-used organic corrosion inhibitor, the corrosion inhibitor disclosed by the invention is non-toxic and harmless, thereby having no environmental problem after use. In addition, the corrosion inhibitor is non-toxic and harmless to environment and living beings, thus conforming to development of green corrosion inhibitors.
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Description

technical field

[0001] The invention relates to a corrosion inhibitor for steel neutral medium, in particular to a corrosion inhibitor for green sodium alginate carbon steel neutral medium and application thereof. Background technique

[0002] Metal corrosion pervades all fields of national economy and national defense construction, and the harm is very serious. Unlike natural disasters, losses due to corrosion can be reduced in a number of ways. The use of corrosion inhibitors in metal protection occupies an important position in various protection methods due to its advantages of small dosage, low price, wide source, good effect and strong versatility.

[0003] Currently commonly used corrosion inhibitors mainly include inorganic compounds such as chromate, nitrate, and nitrite. Due to their toxic side effects and poor environmental friendliness, their application is being restricted and will be phased out. Recently, with the enhancement of people's awareness of environm...

Claims

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