Low-phosphorous pre-film former used for industrial circulating cooling water system pipeline and heat exchanger

Abstract

The invention discloses a low-phosphorous pre-film former used for an industrial circulating cooling water system pipeline and a heat exchanger. The low-phosphorous pre-film former is prepared from the following raw materials in parts by weight: 8 to 10 parts of 2-phosphono butane-1,2,4-tricarboxylic acid, 6 to 8 parts of hydroxyphosphonoacetic acid, 6 to 8 parts of acrylic acid-hydroxy-propyl acrylate-AMPS terpolymers, 6 to 8 parts of hydrolytic polymaleic anhydride, 13 to 14 parts of heptahydrate, 1 to 2 parts of tolytriazole and 0.5 to 1 part of sodium gluconate. According to the low-phosphorous pre-film former used for the industrial circulating cooling water system pipeline and the heat exchanger, due to the cooperation of the 2-phosphono butane-1,2,4-tricarboxylic acid, the hydroxyphosphonoacetic acid and the acrylic acid-hydroxy-propyl acrylate-AMPS terpolymers, the time of film forming is greatly shortened; the operation conditions are better; residual rust deposits and water scales can be effectively removed; the low-phosphorous pre-film former is better in effect on prevention of electrochemical corrosion and under-deposit corrosion, and the service life of equipment is prolonged; and furthermore, the compounding of the various components cannot generate greater counteraction, so that the normal use effect is guaranteed.

Description

technical field [0001] The invention relates to the technical field of pre-filming agents, in particular to a low-phosphorus pre-filming agent for industrial circulating cooling water system pipelines and heat exchangers. Background technique [0002] Pre-film agents are often used in industrial circulating cooling water system pipelines and heat exchangers. Pre-film agents are a class of chemicals that can pre-form a protective film on metal surfaces during the pretreatment process of water treatment. However, the existing low-phosphorus pre-coating agents used for industrial circulating cooling water system pipelines and heat exchangers have an antagonistic effect due to improper compounding of various components, resulting in reduced or lost effects from time to time. The dosage is increasing so that the cost increases significantly, and the film forming time is longer, the operating conditions are poor, and the residual rust and scale cannot be effectively removed, which...

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Problems solved by technology

[0003] The object of the present invention is to provide a low-phosphorus pre-film agent for industrial circulating cooling water system pipelines and heat exchangers, to solve the long film-forming time proposed in the above-mentioned background technology, and its operating conditions are relatively poor, which cannot be effectively removed. Residual rust and scale have a poor effect on preventing electrochemical corrosion and under-deposit corrosion, reducing the service life of equipment

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