Free alkalinity control system and application thereof
Patent Information
- Authority / Receiving Office
- CN Β· China
- Current Assignee / Owner
- HEFEI MIDEA REFRIGERATOR CO LTD
- Publication Date
- 2012-06-13
- Estimated Expiration
- Not applicable Β· inactive patent
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Abstract
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...