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Free alkalinity control system and application thereof

A technology of free alkalinity and control system, applied in metal material coating process, surface pretreatment, device for coating liquid on surface, etc., can solve problems to be improved, etc., and achieve the effect of improving efficiency and effect

Inactive Publication Date: 2012-06-13
HEFEI MIDEA REFRIGERATOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current pre-painting treatment process still needs to be improved

Method used

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  • Free alkalinity control system and application thereof
  • Free alkalinity control system and application thereof
  • Free alkalinity control system and application thereof

Examples

Experimental program
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Embodiment 1

[0105] refer to Figure 5-8, provides a method for automatic detection and control of the concentration of the metal coating pretreatment tank solution: a monitoring system composed of an upper industrial computer, a display screen and configuration software; a control system composed of a PLC and a touch screen; and the detection and feeding of each tank solution A method for automatic detection and control of the concentration of the metal coating pretreatment bath liquid composed of sub-systems of the device. Use the online free alkalinity automatic detection device to detect the pre-degreasing bath liquid containing alkali degreasing agent in metal pretreatment, and the free alkalinity of the degreasing bath liquid, and use the online pH automatic detection device to convert the film containing nano-ceramic conversion agent or silane treatment agent The method of detecting the water quality of the cleaning tank through the online automatic conductivity detection device, an...

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Abstract

The invention provides a free alkalinity control system and application thereof, particularly a free alkalinity control system and a pretreatment method for coating a metal workpiece. The free alkalinity control system comprises a sampling device, a titration apparatus, a feeding device and a free alkalinity control device. The system can effectively control the alkalinity in the reactor.

Description

technical field [0001] The invention relates to a pretreatment process for metal coating. Background technique [0002] In the production process of metal surface spraying in the coating industry, pretreatment is a very important link. The so-called pretreatment is to thoroughly clean the grease, dust and other dirt on the metal surface and form a film on the metal surface. The pre-treatment process is pre-degreasing with alkaline degreasing agent, degreasing, first combined water washing, film conversion with nano-ceramic treatment agent (or silane treatment agent), and second combined water washing process. In the pretreatment process, the concentration control in each treatment tank plays a very important role in the pretreatment quality and the final performance of the coating. [0003] However, the current pre-painting treatment process still needs to be improved. Contents of the invention [0004] The present invention aims to solve at least one of the technical pr...

Claims

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Application Information

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IPC IPC(8): C23C22/78B05D3/10
Inventor 李晓军林罕陈松
Owner HEFEI MIDEA REFRIGERATOR CO LTD
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