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Green corrosion inhibitor for hot-dip zinc-aluminium alloy steel, and application thereof

A technology of corrosion inhibitor and pickling corrosion inhibitor, applied in the field of green corrosion inhibitor, can solve the problems of lack of market competitiveness, eutrophication of water body, toxic and side effects, etc. Low dosage effect

Inactive Publication Date: 2012-09-12
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently commonly used pickling corrosion inhibitors mainly include inorganic corrosion inhibitors containing toxic chromate and some organic phosphorus corrosion inhibitors, the discharge of which may cause eutrophication of water bodies
Most of the existing corrosion inhibitors in the same field have toxic and side effects and do not have market competitiveness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The pickling solution is dilute hydrochloric acid, the concentration is 0.1M, the amount of pickling solution is 100L, add 10g of corrosion inhibitor, clean at room temperature, and immerse for 2 hours.

Embodiment 2

[0016] The pickling solution is dilute hydrochloric acid, the concentration is 0.5M, the amount of pickling solution is 100L, add 20g of corrosion inhibitor, clean at room temperature, and immerse for 1h.

Embodiment 3

[0018] The pickling solution is dilute sulfuric acid, the concentration is 0.5M, the amount of pickling solution is 100L, add 50g of corrosion inhibitor, clean at room temperature, and immerse for 2 hours.

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PUM

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Abstract

The invention discloses a green corrosion inhibitor for hot-dip zinc-aluminum alloy steel and an application thereof, wherein a main component of the green corrosion inhibitor is vitamin B1. The application is that: a pickle of dilute hydrochloric acid or dilute sulfuric acid having a concentration of 0.1M to 2M is added with the corrosion inhibitor within a concentration range of 0.01kg / m3 to 0.2kg / m3, the temperature being controlled to be maintained at a room temperature of about 25 DEG C, and zinc, zinc-aluminum alloy or hot-dip zinc, zinc-aluminum alloy coating steel for pickling are added and submerged for 0.5h to 3h. Products of the invention are applied to industrial pickling of zinc, zinc-aluminum alloy or hot-dip zinc, zinc-aluminum alloy coating steel and products thereof, allowing an avoidance of general corrosions and local corrosions of metal or coatings during a pickling process. As few researches on similar pickling corrosion inhibitors are taken at present, the product has significant advantages of low price, low dosage, high corrosion inhibition efficiency and good ability of continuous reaction. The product of the invention is a natural plant extract, which is nontoxic and harmless to environment and creatures, fitting the developing trend of pickling corrosion inhibitors and providing a promising application prospects.

Description

technical field [0001] The invention relates to a green corrosion inhibitor for hot-dip galvanized aluminum alloy steel and its application, which is used to prevent zinc, zinc-aluminum alloy or hot-dip galvanized, zinc-aluminum alloy coated steel and its products from being unnecessary in the pickling process. The overall corrosion and localized corrosion belong to the technical field of industrial cleaning. Background technique [0002] Zinc, zinc-aluminum alloy or hot-dip galvanized, zinc-aluminum alloy coated steel and its products are more and more widely used. In the process of product processing and application, dilute sulfuric acid or dilute hydrochloric acid is often used for pickling to remove surface oxidation. In order to avoid excessive consumption of metal or acid during pickling and prevent harmful corrosion, adding corrosion inhibitors to acid is an effective means. [0003] Currently commonly used pickling corrosion inhibitors mainly include inorganic corro...

Claims

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Application Information

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IPC IPC(8): C23G1/06C23G1/10
Inventor 鞠虹吴宝贵李强李焰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)