Scale and corrosion inhibitor and preparation method thereof

Abstract

The invention discloses a scale and corrosion inhibitor and a preparation method thereof. The problems of low concentration multiple of circulating water, large water consumption, large discharge capacity, danger caused by adding sulfuric acid to regulate the pH, high phosphorus content of the scale and corrosion inhibitor and environmental pollution in the prior art are solved. The scale and corrosion inhibitor disclosed by the invention is composed of the following components in percentage by weight: 5-10% of hydroxyl ethidene phosphonic acid, 10-20% of 2-phosphine carboxylic acid-1.2.4- tricarboxylic acid, 10-20% of polyamino polyether methylene phosphonate, 20-40% of acrylic acid-2- acrylamide-2- methylpropanesulfonic acid, 1-5% of nonylphenol polyoxyethylene ether, 5-10% of zinc sulfate heptahydrate, 1-5% of benzotriazole and 10-30% of pure water. The invention further provides a preparation method of the scale and corrosion inhibitor. The scale and corrosion inhibitor disclosed by the invention is low in zinc salt and phosphorus salt contents and is capable of preventing the scale deposition on one hand and reducing the water pollution on the other side, thereby being beneficial to environmental protection.

Description

technical field

[0001] The invention relates to a scale and corrosion inhibitor and a preparation method thereof. Background technique

[0002] At present, in order to prevent scaling, corrosion and bacterial growth of equipment heat exchange devices caused by industrial circulating cooling water, chemical agents such as scale inhibitors, corrosion inhibitors, and bactericides are usually added to the cooling water, which are commonly called water quality stabilizers. , using the synergistic effect of these agents can improve the stability of cooling water and reduce production costs. At present, the commonly used monomers are polyphosphate (tripolyphosphate, hexametaphosphate, etc.), organic phosphonic acid (HEDP, ATMP, EDTMP, DTMPPA, etc.), organic phosphine carboxylic acid (PBTCA), dispersant homopolymer (PAA, HPMA, PESA, PASP, etc.), dispersant copolymer (AA-MA, AA-AMPS, T-225, etc.). Commonly used compound formulas are: chromate + zinc salt, polyphosphate + zinc salt,...