Kelp extracting solution steel bar corrosion inhibitor and application thereof

Abstract

The invention provides a kelp extracting solution steel bar corrosion inhibitor. The steel bar corrosion inhibitor is prepared by the following steps: cleaning, drying, grinding and sieving kelp to prepare dry kelp powder; mixing the kelp powder uniformly in an alkaline solution, standing and filtering to obtain an extracting solution; and regulating the pH value of the extracting solution with acid to be 8.5-12.5 to obtain the kelp extracting solution corrosion inhibitor. The steel bar corrosion inhibitor is wide in source of feed, natural, low in cost, simple in preparation process, environment-friendly, efficient, non-toxic, biodegradable, safe to use and the like, the problems that the nitrous acid steel bar corrosion inhibitor and the organic polymer steel bar corrosion inhibitor in universal use at present are toxic, heavy in environmental load and the like are solved; and the kelp extracting solution steel bar corrosion inhibitor has great practical significance in enhancing the durability of steel bar concrete structures under a chlorine salt environment, especially enhancing the durability of major maritime concrete projects such as ports and cross-sea bridges, is easy for popularization and industrialization and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a kelp extract liquid steel bar rust inhibitor, and also relates to an application method of the steel bar rust inhibitor. Background technique [0002] Reinforced concrete structure combines many advantages of steel bar and concrete, and its cost is low. It is the preferred form in civil engineering structure design at present, and its application is very extensive. However, reinforced concrete structures built in environments rich in chloride and salt, such as coastal areas, salt lakes, and saline-alkali lands, are extremely vulnerable to corrosion and damage to steel bars induced by chloride ion intrusion, resulting in reduced durability and shortened lifespan, which threatens the national economy and people's lives and property. Security does a lot of damage. [0003] In addition to the basic method of improving the compactness of concrete to alleviate...

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Problems solved by technology

[0004] Although the rust inhibitors for steel bars have been researched and applied a lot, and the types have been greatly enriched, so far, the rust inhibitors are only inorganic, organic or mixed chemicals, which still have high cost, toxicity, and serious environmental pollution. and other issues, such as the widely used calcium nitrite rust inhibitor is carcinogenic, most organic rust inhibitors are poisonous, an...

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