Concentration type prefilming agent for central air conditioning system

Abstract

The present invention pertains to the field of chemical industry, wherein a concentration type prefilming agent for central air-conditioners is disclosed, which comprises sodium hexameta phosphate, zinc sulfate and hexahydroxylic phosphate ester. The invention also discloses the method for using the prefilming agent.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a treatment agent used after metal surface cleaning. More specifically, the invention relates to a concentrated pre-film agent for a central air-conditioning system. Background technique [0002] For large-scale central air-conditioning systems, the water volume is large. If such systems are cleaned and then passivated, the consumption of passivators will be large and the cost will be high. At the same time, the discharge of a large amount of passivation waste will also pollute the environment. , does not meet the requirements of environmental protection. Moreover, this type of system is often treated with dosing during daily operation, and the corrosion rate is relatively slow. Therefore, after the central air-conditioning system is cleaned, it can be pre-filmed after passivation or without passivation. [0003] The purpose of the pre-film is to pre-form a complete and durable l...

AI Technical Summary

Problems solved by technology

[0002] For large-scale central air-conditioning systems, the water volume is relatively large. If such systems are cleaned and then passivated, the consumption of passivators will be large and the cost will be high. At the same time, the discharge of a large amount of passivation waste will also pollute the environment. , does not meet the requirements of environmental protection

Moreover, this type of system is often treated with dosing during daily operation, and the corrosion rate is relatively slow.