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Yellow Zinc Plated,Round Domed Head Square Neck Carriage Bolt DIN603,M 6 /8 /10 /12 /16
Diameter range (mm)：M5-M24，3/16-1'Length range (mm)：16-600，1''-2'
High strength nuts must normally work in harsh environments. In order to make the high-strength nut work longer, a layer of maintenance must be provided for the high-strength nut. There are several protection methods, usually based on blackening. Today, let's talk about the blackening process of high-strength nuts.
In fact, the blackening process is a blackening process at room temperature, which can be divided into the following processes.
First of all, the surface rust of high-strength nuts is washed away. Later, in the gradual degreasing process, it is necessary to thoroughly infiltrate the high-strength nut product workpiece into the degreasing saturated solution; The pH value of degreasing solution concentration value is between 12 and 14, and the immersion time of degreasing solution is generally 10 to 30 minutes. In the process of degreasing, it is necessary to carry out a left and right vibration every three to five minutes, and then repeat several times to move to the next step. Here it should be very clear that if the liquid concentration value is less than 12 PH, it must be filled with degreased powder.
The next step is to achieve a simple water cleaning process. After cleaning the surface of chemical materials, it is necessary to gradually acid wash. Pickling must be done with a saturated solution with a pH between 2 and 4. The pickling process must take five to ten minutes. After that, clean up the chemicals.
When this processing process is completed, the high-strength nuts gradually turn black. In the black pool, pour chemicals with pH value of 2.5 to 3.5 to soak high-strength nuts. Soak the dried fruit and then clean it for ten to twelve minutes. Finally, the blackening process can be carried out after the cylinder is used for drying and oiling before drying.
The blackening process of high-strength nuts is relatively simple. However, it must be completely installed in a timely manner and strictly follow the required operation process to complete the actual operation. Therefore, if we want to solve the problem of blackening, we must also guide the actual operation through professional staff.
