Galvanizing corrosion inhibitor in mixed acid medium

Abstract

The invention relates to a galvanizing corrosion inhibitor in a mixed acid medium, which is particularly suitable for galvanizing equipment and belongs to the technical field of equipment cleaning and protection. The corrosion inhibitor comprises a solute and a solvent; the solute accounts for 5%-10% of the total weight of the corrosion inhibitor, and the solvent accounts for 90%-95% of the total weight of the corrosion inhibitor, wherein the solute comprises dodecyl dimethyl benzyl ammonium chloride, nicotinic acid, acridine, berberine, imidazoline amide and sodium polyacrylate; and the solvent is a mixed solution of hydrochloric acid and oxalic acid in a volume ratio of 1: 6. The galvanizing corrosion inhibitor is wide in raw material source, economical and practical in price, simple in production process and capable of meeting the preparation requirement at the normal temperature. A galvanizing coatis effectively protected on the basis of ensuring the cleaning effect, the corrosion rate is low, the cost is low, the manufacturing process is simple, and the galvanizing corrosion inhibitor is has popularization and application value.

Description

technical field [0001] The invention relates to a high-efficiency galvanizing corrosion inhibitor in mixed acid medium and a preparation method thereof, which is especially suitable for chemical cleaning of galvanizing equipment and belongs to the technical field of equipment cleaning and protection. Background technique [0002] Metal zinc is an amphoteric metal, the standard electrode potential is -0.762V, and the equilibrium constant of the reaction with acid is 5.888×10 25 , is highly reactive in acidic solutions and is one of the least corrosion-resistant metal materials. Zinc amalgamation is a long-established corrosion inhibition measure. Chromate and nitrite can also effectively protect zinc metal from corrosion. However, mercury is highly toxic, and chromate and nitrite can also cause environmental pollution, and their applications are subject to certain restrictions. So far, there are few highly efficient metal zinc corrosion inhibitors, and some people have pub...

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Problems solved by technology

[0003] Galvanized heat exchange equipment is used by more and more enterprises due to its low cost and good heat exchange performance. The scale greatly reduces the heat exchange effect of the equipment, causing a lot of extra waste of water and electricity resources. The enterprise must stop production and carry out chemical cleaning, descaling and maintenance of the equipment.

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