PH (Potential of Hydrogen) control system and application thereof

A technology of control system and control device, applied in the direction of control/regulation system, ratio control, chemical variable control, etc., can solve the problems to be improved, and achieve the effect of improving efficiency and effect
CN102495647AInactive Publication Date: 2012-06-13HEFEI MIDEA REFRIGERATOR CO LTD +1
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
HEFEI MIDEA REFRIGERATOR CO LTD
Publication Date
2012-06-13
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention provides a pH (Potential of Hydrogen) control system and an application thereof and particularly provides a pH control system. The pH control system comprises a sampling device, a pH detection device, a charging device and a pH control device, wherein the sampling device is used for extracting a sample in a reactor; the pH detection device is connected with the sampling device and is used for carrying out pH detection on the sample extracted by the sampling device, so as to determine a pH value of the sample; the charging device is connected with the reactor and is used for adding a feed liquid into the reactor; and the pH control device is respectively connected with the pH detection device and the charging device and used for turning on or off the charging device to add the feed liquid into the reactor on the basis of the pH value, obtained in the pH detection device, of the sample. The invention further provides a method for processing a metal work piece before coating by using the pH control system. By utilizing the pH control system, the pH value of a solution in the reactor can be effectively controlled.
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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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