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Concentration type prefilming agent for central air conditioning system

A technology of central air-conditioning system and pre-filming agent, which is applied in the direction of coating, etc., which can solve the problems of slow corrosion speed, non-environmental protection, environmental pollution of passivation waste liquid, etc., achieve short pre-filming time, convenient storage and transportation, and excellent effect Good results

Inactive Publication Date: 2006-04-05
SHANGHAI WANSEN WATER TREATMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. After acid cleaning and passivation of the circulation system, the passivation solution is discharged and rinsed in a circular manner until the water quality is clear. Alternatively, passivation solution may not be used, and the diluted pre-film agent of the present invention may be added directly after acid cleaning.

[0016] 2. After adding the pre-film agent of the present invention, circulate for 2 hours to ensure that the concentration of the entire system is uniform.

[0017] 3. Turn on the circulating pump for at least 2 hours a day, and a layer of anti-corrosion film can be basically formed on the surface of the system after a week.

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00
Inventor 沈志昌
Owner SHANGHAI WANSEN WATER TREATMENT CO LTD
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