Companies specializing in the production of electronic case, outdoor cabinet, DC screen cabinet, grid cabinet, box change shell, stainless steel cabinet, shaped case shell companies with strong technical strength, set many years of research and development and manufacturing experience, constantly introduce advanced technology, pay attention to technical transformation to provide excellent quality, high technical content of products to the domestic and foreign markets. And can provide various specifications of specific cabinets according to user requirements.
How to deal with rust in sheet metal processing?
Date：
2023-03-20
Have to admit, sheet metal processing after phosphating often have rust water infiltration, it is a difficult problem in many sheet metal processing plants. So how do you avoid rust and deal with this problem? People need to find the reason for this situation to carry out analysis.
How to solve the corrosion problem in sheet metal processing in People's Daily life? You can read the following text.
Have to admit, sheet metal processing after phosphating often have rust water infiltration, it is a difficult problem in many sheet metal processing plants. So how do you avoid rust and deal with this problem? People need to find the reason for this situation to carry out analysis.
1. When pickling passivation, the acid in the gap is not integrated or incomplete. Pickling phosphating into the skin film is not completely easy to rust, and after spraying, rust will spread to overflow the gap.
2. Strong alkali pickling passivation, strong partial alkali deoilling solution, residual drugs in the gap due to oxidation in each other, many manufacturers have not clean up the tap water, which results in a milky white product on the gap after drying, when sprayed over a period of time, this milky product, and the etch substance in the gas caused a kind of exothermic reaction in the overflow gap, This problem usually occurs between March and December.
And people's solutions to the problem of sheet metal processing to avoid corrosion are as follows:
1. Deoiling must be done with weak alkaline deoiling, which must not contain tablet alkali. TAL should be operated at around 15POINT, and PH should not exceed 12.
2 pickling passivation process can choose hydrochloric acid pickling passivation, pickling passivation time is not too long, the application of ammonium sulfate is just right.
3. After pickling passivation, please use 1~2 sodium carbonate in combination.
4 Surface regulation with hydrochloric acid such organic chemical materials, the application of concentration value of 1~2 degrees can be.
5 Zinc pickling phosphide acid value should be limited, preleaching solution try: TA: 45 or so, FA: 1.3AC: 8 (20cc alcohol tube).
6. All hand washing projects shall not be cleaned and neat, and the overflow shall be maintained.
keyword：
Sheet metal working
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Companies specializing in the production of electronic case, outdoor cabinet, DC screen cabinet, grid cabinet, box change shell, stainless steel cabinet, shaped case shell companies with strong technical strength, set many years of research and development and manufacturing experience, constantly introduce advanced technology, pay attention to technical transformation to provide excellent quality, high technical content of products to the domestic and foreign markets. And can provide various specifications of specific cabinets according to user requirements.
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