Vpliv delovnih pogojev jedkanja

Etching is a key process in the decoration of metal plate patterns. In order to obtain pattern products with clear stripes and strong decorative properties, it is necessary to pay attention to controlling the conditions of the etching process. Mainly the temperature and etching time of the etching solution. A slightly higher solution temperature can increase the rate of metal dissolution, that is, the speed of etching, and shorten the time required for etching. However, etching solutions are generally strong acid liquids, which have strong corrosiveness at high temperatures and can easily soften or dissolve protective coatings or corrosion-resistant inks, reducing the adhesion of the corrosion-resistant layer on non etched parts of the metal. This can cause the corrosion-resistant coating at the junction of etching and non etching to peel off or melt, blurring and deforming the etched pattern, affecting the beauty, authenticity, and decorative effect of the pattern. Therefore, the temperature should not exceed 45℃. Similarly, if the etching time is too long, especially in the case of high etching solution temperature, the immersion time of črnilo ali zaščitna prevleka, odporna na korozijo, je predolga, kar ima tudi zgoraj omenjene stranske učinke in neželene posledice . Zato mora biti časovni nadzor primeren in ga ne smemo predolgo potopiti, na splošno ne presega 20-25 minut .