How to clean auto screws?

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Although the environmental sanitation of automobile screws is not ideal, before selling the screws to customers, customers are still picky about the appearance of automobile screws. If the screws taken out are dirty and full of oil, it will give people the first place. The impression is relatively poor, and the price in the eyes of the customer is not high, so the cleaning of the screws is an essential detail work. However, since screws are inevitable to deal with various lubricating oils and emulsifiers in the process of processing, and these oil stains are more difficult to clean, then in order to clean the appearance of screws, what good methods can be adopted? What problems should we pay attention to during the cleaning process?

First of all, the most important thing about automobile screws is the thread, and the thread is more susceptible to damage by sharp materials, so be careful when cleaning the screw thread, and do not use metal balls or other grinding tools to clean the thread wanton. Once the thread is damaged, the entire screw will be scrapped.

Secondly, the stains on car screws are mainly oil stains and dust. The characteristics of these two stains are different. The former is more troublesome to clean and the water solubility is very low, while the latter is easier to clean. Therefore, we must treat screws with different sanitary conditions differently. If the main purpose is to remove oil, it is recommended to use a neutral detergent to wipe. The chemical damage to the screws is relatively small, and it is not too hurting the hands. Some staff do not understand the situation and use bleach or detergent. This is not allowed, because the screw detergent on the market contains abrasive ingredients. Although it is easier to clean, you will find that if you look closely Many fine lines will be scratched on the surface of the screw. If you focus on cleaning the gray layer on the screw, the method is much simpler, as long as you need to mix hot soapy water with a small amount of detergent.

Finally, for the special stains of car screws, such as rust stains, it cannot be cleaned with general cleaning agents. It is best to use a nitric acid solution with a concentration of about 10% to wipe.