Formula of green corrosion inhibition cleaning agent for hot-dip coated steel and application thereof

Abstract

The invention discloses a green corrosion inhibitor for hot-dip galvanized aluminum alloy steel and an application thereof. Main components of the green corrosion inhibitor comprise vitamin B4 and vitamin C, and the compounding ratio is (1:1)-(5:1). The application is as follows: an acid cleaning solution is of dilute hydrochloric acid or dilute sulfuric acid, the concentration is 0.1M-2M, 0.01kg / m<3>-0.20kg / m<3> of the corrosion inhibitor is added, the temperature is controlled at room temperature which is about 25 DEG C, and zinc, zinc-aluminum alloy or hot-dip galvanized and zinc-aluminum alloy-coated steel to be cleaned is added for immersing for 0.5h-3h. The product disclosed by the invention is used for industrial acid cleaning of zinc, zinc-aluminum alloy or hot-dip galvanized and zinc-aluminum alloy-coated steel and the products thereof, and can prevent total corrosion and local corrosion of metal or plated layers during the cleaning process; and the studies of the similar acid cleaning corrosion inhibitors are fewer at present, and the product has the prominent advantages of cheap price, low using quantity, high corrosion inhibition efficiency and strong continuous acting ability. The product disclosed by the invention is a natural plant extract which is non-toxic and harmless to the environment and organisms, is in line with the trend of development of acid cleaning corrosion inhibitors, and has great application prospects.

Description

technical field [0001] The invention relates to a formula and application of a green anti-corrosion cleaning agent for hot-dip galvanized steel, which is used to prevent zinc, zinc-aluminum alloy or hot-dip galvanized, zinc-aluminum alloy coated steel and its products from unnecessary comprehensive damage during the pickling process. 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 inor...

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