First, what is electrolytic metal etching?
Electrolytic metal etching is the principle of anodic dissolution of metal in the liquid with salt water as the main body of etching, and the metal is etched under the action of electrolytic metal. After the etching power supply is switched on, the purpose of etching can be achieved.
Second, what are the advantages of electrolytic metal etching?
Metal surface etching graphics and text, used to be acid or alkaline etching, and now there are some sign production enterprises also use this way.
Chemical etching application is more common, can etch a variety of signs, elevator board, crafts, circuit boards and so on. But for some special metal materials or higher requirements, etching deeper decorations, there are certain difficulties. In this case, electrolytic metal etching can be used to solve the problem.
Electrolytic metal etching and chemical etching compared, you will find that electrolytic metal etching can deal with a variety of metal materials, and chemical etching is generally dealt with copper, stainless steel and aluminum, but many metals in the electrolytic metal solution have the role of dissolution.
Because electrolytic metal etching mainly relies on the electrolysis of metal by current, the composition of electrolytic metal liquid is relatively simple, the cost is low, and the solution is generally salt water. The corrosion of the solution is very small, the protection requirements of the equipment are low, and the environment will hardly cause any pollution. Secondly, electrolytic metal etching can achieve a higher etching depth.
In addition, the corrosion of electrolytic metal etching along the side of the protective layer is small. For the convex word signs that need to be etched in a large area, the strokes can not be deformed, the three-dimensional sense is strong, and the decorative effect is good. Therefore, in some cases where chemical etching cannot be solved, electrolytic metal etching can be considered.
Although electrolytic metal etching has great advantages over traditional chemical etching, electrolytic metal etching also has its shortcomings. For example, electrolytic metal etching requires power supply equipment and related devices. The etch-resistant materials used require both corrosion resistance to electrolytic metal and good insulation performance. In addition, electrolytic metal etching needs to consume electricity, a large investment. Therefore, for hardware signs and some etching handicraft manufacturers, the use of chemical etching or electrolytic metal etching needs to be considered in many aspects, but electrolytic metal etching is certainly a future trend of etching.
Three, the principle of electrolytic metal etching
Electrolytic metal etching is actually electrolysis of a metal material, such as copper, iron, etc. The specific method is to etch the part as the anode, with corrosion resistant metal materials as the auxiliary cathode. Then connect the anode to the positive terminal of the power supply and the auxiliary cathode to the negative terminal of the power supply. When the current passes through the electrode and the electrolytic metal solution, an electrochemical reaction occurs on the surface of the electrode and the electrolytic metal solution, and the part of the metal to be dissolved and removed is removed by this reaction to achieve the purpose of metal corrosion.
According to Faraday's law, the amount of electricity that passes through is proportional to the amount of metal that is dissolved, meaning that the more metal that is etched, the more electricity is consumed. According to the principle of electrochemistry, after the power of electrolytic metal etching device is connected, oxidation reaction occurs on the anode and reduction reaction occurs on the auxiliary cathode. The result of the anodic reaction is that the etched metal is oxidized into hydrating ions or complexing ions into the electrolytic metal solution. As a result, the etched metal constantly dissolves and leaves equivalent electrons on the surface of the metal. Electrolytic metal etching is mainly the use of current to accelerate the dissolution of the etched metal, rather than chemical etching to add a variety of additives, especially accelerator.
Four, electrolytic metal etching ink
Electrolytic metal etching ink, screen printing spray on the metal surface, plays the role ofelectrolytic metal, protect the part that does not need to be electrolyzed metal is not destroyed.
Asset Metal technology focuses on metal process solutions, which are widely used in toys, electronics, intelligent components, unmanned aircraft and vehicles.
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