Metal surface anti-rust liquid and preparation method thereof

Abstract

The invention discloses metal surface anti-rust liquid and a preparation method thereof. The metal surface anti-rust liquid is prepared from the following raw materials in parts by weight: 7-19 partsof sodium benzoate, 1-3 parts of sodium silicate, 0.5-3 parts of sodium dodecyl benzene sulfonate, 5-16 parts of sodium nitrite, 0.5-3.5 parts of ethylenediamine tetraacetic acid, 0.3-2 parts of hydroquinone, 2-7 parts of sodium hypophosphite, 0.5-2 parts of citric acid, 0.3-1.5 parts of urea, 0.3-1.8 parts of Kathon, 0.8-3.5 parts of polymer composite synergistic activator and 90-240 parts of deionized water. After being applied to a metal surface, the metal surface anti-rust liquid prepared in the invention can prevent rusting of the metal surface for a long time, and thus has a good anti-rust effect.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a metal surface antirust liquid and a preparation method thereof. Background technique [0002] Metal rust not only damages the metal workpiece itself in terms of shape, color and mechanical properties, but also reduces the quality of the product, and even makes the product scrapped. [0003] In the existing metal surface antirust technology, after the metal surface is chemically degreased and derusted, a protective film will be deposited on the metal surface. Although this protective film can prevent the metal surface from rusting in a short period of time, it is relatively short After that, new rust will gradually form on the metal surface. Patent CN1418920A discloses a metal rust-removing and antirust paint and its production method. Its main raw materials are phosphoric acid 36-41%, acetic acid 8-10%, iron phosphate 9-13%, glycerol 0.1-0.5%, carbo...

AI Technical Summary

Problems solved by technology

[0002] Metal rust not only damages the shape, color and mechanical properties of the metal workpiece itself, but also reduces the quality of the product, and even makes the product scrapped

[0003] In the existing metal surface antirust technology, after the metal surface is chemically degreased and derusted, a protective film will be deposited on the metal surface. Although this protective film can prevent the metal surface from rusting in a short period of time, it is relatively short After that, new rust will gradually form on the metal surface.

Patent CN1418920A discloses a metal rust-removing and antirust paint and its production method. Its main raw materials are phosphoric acid 36-41%, acetic acid 8-10%, iron phosphate 9-13%, glycerol 0.1-0.5%, carbonic acid Manganese 0.1-0.2%, the balance is water, and the reaction time is 12 hours. The metal rust and antirust paint has a good rust removal effect, but due to the high concentration of phosphoric acid, it is easy to cause over-corrosion on the metal surface, and there are Poor anti-corrosion performance, long reaction time and other disadvantages