Presumably, friends who have been in the metal manufacturing industry have known about pickling. Pickling is to remove the oxide film on the metal material, and form a phosphate film on the metal surface while removing the oxide film. Don't underestimate this film, which plays a certain role in the later spray molding or molding process. It has to be said that such pickling is like a new dress for the metal surface, and it is a new dress that must be put on. From this point of view, acid pickling is also a necessary step for us, and it should be done in place without carelessness. Let's learn about the acid pickling process of flange nut.

The first step is to master the concentration and temperature in the tank. On this premise, tilt the disk into the tank we have prepared. The first step is to remove the oxide film on the metal surface. The second part is to change a pool. The procedure here is called clear water. Its main function is to remove the corrosive substances on the surface. The third oxalic acid is to increase the activity of metal and lay the foundation for the next moral coating. The following is our most critical step, phosphate and metal materials to contact the surface, forming a film. The water below has a step to remove the residue. Such steps may seem simple, but we need to grasp the time well during the operation, which requires that the operators have a good grasp of the time, otherwise acid pickling is a passing field, without practical significance, then the subsequent steps can not be implemented. It can be said that pickling is a transition period of flange nut manufacturing, which must be well realized in order to complete our following process and meet certain quality requirements.