High-strength nuts often need to work in harsh environments. In order to keep high-strength nuts in service for a longer period of time, a layer of maintenance must be given to high-strength nuts. There are many maintenance methods, generally achieved by blackening. Let's talk about the technical process of high-strength nut blackening. In fact, the blackening process is a blackening process at room temperature, which can be divided into the following processes. First, the surface of the high-strength nut is rusted and washed away. Afterwards, to start the degreasing process, it is necessary to thoroughly infiltrate the high-strength nut product into the degreasing solution; the pH of the degreasing solution is between 12 and 14, and the soaking time for degreasing is generally 10 to 30 minutes. During the degreasing process, it must be shaken every three to five minutes, and then repeated several times to enter the next step. Here is a special explanation, if the liquid concentration is less than the PH value of 12, it needs to be supplemented with degreasing powder. The next step is to carry out the corresponding water cleaning process. After cleaning the surface layer of chemical raw materials, it must be gradually pickled. Pickling requires pickling solution with a pH between 2 and 4. It takes five to ten minutes to carry out the pickling process. Later, clean up the chemicals. So when all the processing techniques are completed, the high-strength nuts gradually turn black. In the black pool, a chemical with a pH value of 2.5 to 3.5 is poured to soak the high-strength nuts. Soak the dried fruit and then clean it for ten to twelve minutes. It can also be dried with a cylinder, and the blackening process can be completed by oiling after drying. The blackening process of high-strength nuts is relatively simple. However, it must be fully installed in a timely manner and strictly follow the prescribed operating procedures to operate. Therefore, if you want to do a good job in blackening, you need to use professional personnel to guide the operation.