Turkish customer ordered 180pcs magnesium etching plates

In June 2022, HOT SALES,180pcs magnesium etching plates are packed for delivering to customer in Turkish. 

The hard ironing of the magnesium plate is better than the ironing of the zinc plate. In the production process of the magnesium plate, it is necessary to use a laser machine for engraving first to engrave the lines, and then use a grinding machine to carry out the engraving of the magnesium plate with the lines. sanded. Magnesium plates used before engraving patterns must first ensure their flatness, so such magnesium plates need to be ground before leaving the factory.

In the etching process, metal aluminum is a very commonly used etching metal.

Aluminum is an active metal with a strong affinity for oxygen and can rapidly form an oxide film in air and water. Due to the existence of the oxide film, aluminum has strong corrosion resistance. Therefore, a certain proportion of active ions should be added to the aluminum etchant to destroy the oxide film before corrosion. Aluminum is amphoteric in the corrosion process, that is, it can be corroded by alkali and acid. The corrosion of aluminum in the corrosive solution is divided into three processes:

The first step is to destroy its oxide film. The active ions in the corrosion solution are sprayed by the high-pressure pump to make the oxide film fall off in spots, and all fall off as the corrosion continues;

The second step is pitting. Because the aluminum oxide film gradually falls off in the form of dots under the action of active ions in the corrosive solution, the first exposed metal is corroded, and pitting corrosion is formed. As a result of pitting corrosion, the metal surface is uneven, which must be avoided in the corrosion of metal signs.

The third step is uniform corrosion. Since the aluminum oxide film falls off from point to complete during the corrosion process, although pitting corrosion is formed, a certain amount of etching agent is added to the corrosion solution and the high-pressure washing of the high-pressure pump makes the oxide film and the corroded The lower metal ions quickly leave the corrosion zone, so that uniform corrosion can be completed.

Aluminum metal is in the passivation zone between PH value 4.5-8.5, and the passivation film is not easy to be corroded. When the pH value is less than 4.5, it is acid corrosion; when the pH value is greater than 8.5, it is alkaline corrosion. Because most of the protective inks used in sign corrosion are acid-resistant, most of the corrosive liquids used are also acidic. The pH value of the acid corrosive solution is not the lower the corrosion is faster. Taking nitric acid corrosion solution as an example, when the concentration reaches 30%, the corrosion rate is the fastest when the temperature is above 15 °C, and the higher the temperature, the faster the corrosion rate. If the concentration is further increased, the corrosion rate will decrease, and when the nitric acid reaches 80%, there is almost no corrosion.

The main composition of the aluminum brand etchant is made up of: oxidant, activator, equalizer and water in a certain proportion. Since the prepared corrosive liquid is observed with the naked eye, it is the same as clear water, so it should be poured into the corrosion machine immediately or marked with obvious labels to avoid unnecessary harm to people.