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Stainless Steel Etching Principle

Apr 14, 2021

Stainless steel etching is a chemical method on the surface of stainless steel, using the strong oxidizing property of ferric chloride to corrode various patterns and patterns on the surface of stainless steel, and the trivalent iron element becomes a relatively stable divalent iron element; with 8K mirror The panel, wire drawing board, and sandblasting board are used as the bottom plate. Now the surface of the bottom plate is coated with an anti-corrosion layer to protect the areas that do not need to be corroded, and then put it on the assembly line sprayed with ferric chloride. After the corrosion is completed, the corrosion layer will be added Wash off to form a pattern; after etching, the surface of the object is further processed. The stainless steel etching plate can be processed with various complex processes such as partial patterning, drawing, gold embedding, and partial titanium gold. The stainless steel etching plate realizes the pattern of light and dark. , The colorful effect.


Chemical Etching Process Stainless Steel

Pre-treatment of stainless steel workpiece (manual cleaning, burr and weld bead removal, etc.)→degreasing (70~80℃, until it is exhausted)→cleaning→drying→covering with patterned film (should be non-porous, corrosion-resistant and Heat resistance)-chemical etching (45~50℃, etching speed 10~20pm/h)→cleaning-release film→cleaning→chemical polishing (25-40℃, 1~5h)→cleaning→neutralization (25~40℃) , Lmin)→cleaning→chrome electroplating (cathode current density 50~60a/dm2, 55~60℃)→product→protection treatment→warehousing.


Decorative features of stainless steel etching plate

Nowadays, people's pursuit of life is getting higher and higher, and the requirements of indoor and outdoor decoration styles are also increasing. Therefore, the requirements for wall decoration materials are not only beautiful, but also beautiful and long-term use. For example, the current gun paints, etc., although they can provide various color patterns, although the moisture in the air will cause mildew, it is not suitable for long-term use. The stainless steel etching plate that appears now not only provides a variety of colors and patterns, but also has the excellent characteristics of stainless steel, which is not easy to corrode and rust. But the only downside is that its price is more expensive than wallpaper paint, but in the long run, it is still worth the money, and it is also loved by consumers.


Summary of Stainless Steel Etching Technology

1.The best formula and process parameters of chemical etching are: fec13660~850g/1, hc1(36%) 8~20m1/1, additive 10~20g/1, temperature 45~50℃. Under this condition, the etching speed is 10-20μm/h, and the etching time depends on the specific depth of the pattern.

2.The best formula and process parameters for chemical polishing are: nitric acid (65%) 15~40m1/1, hydrochloric acid (36.5%) 60~100m1/1, phosphoric acid (85%) 20~45m1/1, composite brightener 1~ 5g/1, corrosion inhibitor 02~2g/1, thickener 2~20g/1, polishing temperature 25~40℃, polishing time 1~5h. Under this condition, a polished surface that is as bright as a mirror can be obtained.


3.The best process of chromium electroplating: chromic anhydride 230~270g/1, sulfuric acid 23~2.7g/1, trivalent chromium<5g/1, cathode current density 50~60a/dm2, temperature 55~60℃. Chromic anhydride not only stabilizes the plating solution in the chromium electroplating solution, but also has a certain buffering effect on the pH, so that the thickness of the plating layer can continue to increase.