In the precision etching line processing industry, many customers are not very familiar with passivation. Here is a detailed analysis of the passivation process. The passivation of the metal surface is a method in which the metal is exposed to the air or chemical or electrochemical methods to transform the active state of the metal surface into a passive state that is not easily oxidized, thereby delaying the corrosion or further oxidation of the metal. The former can be called natural passivation, and the latter can be called artificial passivation. The passivation treatment of the metal workpiece before etching the anti-corrosion layer has two purposes: ① to prevent the metal surface from rusting; ② the adhesion of the anti-corrosion layer can be improved through the passivation film.

In the process of precision etching line processing, the anti-etching layer will fall off due to various reasons. In different metal etching processes, the causes have the same parts. For the anti-etching layer falling off, we find out the cause and prevention Method of exclusion. First of all, what causes the anti-etching layer to fall off during the etching process? The main points that cause the anti-etching layer to fall off during the etching production process are as follows: Hardware etching introduces the following points: 1. The metal surface is not clean and degreasing. 2. The baking temperature and time of the anti-etching layer are not enough. 3. The temperature of the etching solution is too high.

Precision etching line processing is a process method for processing metal parts through photochemical reaction and etching. Stainless steel etching processing makes full use of the current advanced computer-aided design technology to make the graphics that need to be processed into film, and then copy the film graphics to the surface of the metal material through photochemical reactions, and form the protected metal part graphics on the surface of the metal material. The etching method etches away unprotected metal materials to produce metal parts. Compared with the traditional mechanical punching method, the etching process has a short production cycle (generally, the product can be manufactured in 3 days),

As long as there are human activities, it will cause different degrees of pollution to the environment. The environmental pollution caused by human activities can be divided into industrial pollution, traffic pollution, agricultural pollution, and domestic pollution according to the causes. Among these types of pollution, industrial pollution has contributed a lot to environmental pollution and is also difficult to remove. From the perspective of environmental protection and the need for survival, it is very important for every processing enterprise to put pollution prevention and environmental protection in the first place when designing processes. Precision etching line processing involves the use of chemical syrup, which is the most important thing. From the perspective of process design, the contribution to environmental protection is mainly considered from the following aspects.

Pre-processing machine; in the first step, the etching processing part must use the pre-processing machine to remove the oil, dust, fines and other impurities on the metal surface through chemical solution cleaning, so as to ensure the smooth progress of the subsequent chemical reaction to obtain high-quality etching Processed products. Coating machine: Coating machine equipment is mainly used in the metal surface coating process stage of the early etching stage, coating a layer of photosensitive ink on the surface of the metal workpiece to protect it. Dryer: The (wet) ink coated on the metal surface in the previous stage is dried by the drying equipment to increase the adhesion and make the ink and the metal workpiece firmly bond.

1. The choice of etching method. There are mainly two methods of precision etching line according to the contact form of the workpiece and the solution, namely, spray etching and immersion etching. There are the following two principles for the selection of etching methods. (1) Production capacity: spray etching has high efficiency, fast speed and high precision, suitable for a certain batch of production, production is easy to realize automatic control, but the equipment investment is large, and it is not suitable for the etching of special-shaped workpieces and large workpieces. ;The immersion etching equipment has a small investment, easy etching, and a wide range of workpieces, but it is not suitable for mass production. At the same time, the immersion etching speed is slower than the spray type, and the production efficiency is lower than that of the spray type. The production process is not easy to realize automatic control.