Corrosion inhibitor and application thereof

Abstract

The invention discloses a corrosion inhibitor and application thereof. The corrosion inhibitor is a corrosion inhibitor in organic acid cleaning and is prepared from the following raw materials by weight percent: 10%-50% of phytic acid, 20%-40% of urotropin, 0.5%-3% of citric acid, 0.5%-5% of sodium nitrate, 0.5%-2% of anion active agent and the balance of water.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a corrosion inhibitor and its application. Background technique [0002] The hydrogen ions released by traditional corrosion inhibitors during the pickling process diffuse into the steel matrix, causing uneven, crisp, and over-corrosion on the steel surface. Due to over-corrosion, the yield of steel is low, and the released hydrogen chloride gas pollutes Air is also harmful to the human body. The selection of high-quality pickling corrosion inhibitor directly affects the effect of pickling quality, such as reducing iron loss, acid consumption, improving the surface quality of steel products and subsequent production processes, which are the guarantee for iron and steel enterprises to save energy, produce efficiently and pursue first-class products . The existing corrosion inhibitors have poor corrosion inhibition ability. During the pickling process, more hydrogen...

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Problems solved by technology

From a thermal point of view, when the iron matrix reacts with acid, phytate ions promote the dissolution and corrosion of the iron matrix by forming complexes with ferrous ions, but in terms of kinetics, due to the reaction of iron and hydrogen ions to generate hydrogen and ferrous Ions, most of the hydrogen escapes from the surface of the iron matrix, and the ferrous ions form complexes with the ferrous ions near the surface of the iron matrix, and form a thin film layer, which hinders the reaction of hydrogen ions with the iron matrix

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