Application of chemical etching machine process

In ancient times, the application of chemical etching machine technology was accidental. One day, people accidentally spilled acid on the metal and found that the acid could corrode the spilled area and bite off. The bitten area and the non-bitten area formed It has a three-dimensional feeling. Then people carefully recorded this situation. Subsequently, a strong acid type non-polar acid, which is an anti-corrosive substance, was discovered. After continuous experimentation and improvement, it was gradually applied to real life and brought great convenience to people's lives.

　　 Around the 15th century, people mainly applied the etching machine technology to the processing of armor. The craftsmen who made the armor mapped some anti-corrosion materials to the surface of the workpiece. It can be used for marking and corrosion protection. It is also possible that the rust spots formed by the damage of the protective layer have played a role in marking, so that people have been inspired to improve and slowly master the etching machine technology. At the beginning, the patterns on armors, helmets, weapons and other armors were difficult to make by hand carving. People had to find a quick and convenient way to process them. Through continuous experiments, they found that acid can corrode metals, and they found that Materials that can resist acid and corrosion, finally began to use chemical corrosion technology in the production of armor patterns.

Regarding the application of etching machine technology to metal, the earliest written record appeared in the 15 actual British manuscript, which described an etching machine technology liquid configured with salt, activated carbon and vinegar, and a The coating composed of linseed oil serves as a protective layer. When processing, first coat the protective area pattern with the technical materials of the anti-etching machine according to the style of the finished workpiece, and the metal in the exposed area will be bitten off by the acid. In the future, more advanced paraffin wax and natural resin will be used as the protective layer. When using this method, first apply paraffin wax on the entire material, and then scrape the paraffin wax from the places that need to be engraved and corroded. This is the origin of stepped chemical corrosion or contour corrosion processing.

"Using a liquid to eliminate the possibility of one or more metal materials firstly depends on the effectiveness of this compound, that is to say, the corrosiveness of this compound. Only when this compound is sufficiently corrosive can it be used as a chemical raw material for etching machine technology. It can also be seen from this that the major developments in chemical corrosion are the direct results of the development of technical solutions for chemical etching machines. In addition, the second decisive role is the discovery and development of anti-corrosion materials, because this controls the targeted local corrosion of the same metal in order to truly produce and process the products we need, so protective materials are very important. Since the development of corrosion processing technology, protection technology and corrosion process methods have always been pipe fittings that ensure the quality of processing.

　　 Technicians engaged in corrosion processing in ancient times, unlike ours today, there are many ways to transfer pictures and texts to the metal surface that needs to be corroded. The earliest method may be to use some paraffin, rosin, asphalt, etc., or it may use natural organic materials such as beeswax and tung oil. According to records, in the 16th century, artisans specializing in corrosion processing had to patiently spend several weeks or even months, smashing these materials in a certain proportion, and then blending them with liquid asphalt or tung oil, or directly It is heated and melted to make protective coating. Then use a brush to carefully apply the protective coating on the entire surface of the part that needs to be corroded, and then dry or cool to harden; then use a hard object such as a needle or a scraper to make the pattern on the protective layer, and then use the original Method for corrosion processing. We can imagine how they used paraffin wax and other natural normal temperature solid resin to build a barrier around the corroded part, and then slowly added the acid to the corroded part. We can estimate the various difficulties encountered by these craftsmen who specialize in corrosion. For example, the adhesion of the anti-corrosion layer is not enough. Before the corrosion depth requirement is reached, the anti-corrosion layer may fall off in whole or in part. It needs to be polished by hand to remove all corrosion burn marks; anti-corrosion walls built with paraffin wax and other natural resins can’t prevent acid from overflowing, causing the outer edges or other parts of the parts to be corroded. The parts are processed before they are corroded, and at the same time they have expensive value, and thus bear great risks. With the development of other auxiliary technologies and organic materials, large containers can be made of non-metallic materials, and at the same time, the use of anti-corrosion coatings to protect other parts of the parts is gradually mastered. At this time, the parts can be directly immersed. .