Stainless steel coil Manufacturer, stainless steel plate/sheet Stockholder, SS coil/ strip Exporter In CHINA.
1.Electropolishing
It is an electrochemical process that allows to decrease the surface roughness. We can imagine it as a kind of “reverse plating”. Basically, we can remove the surface layer by dipping the piece in a chemical bath and applying an electric current. The peaks are rounded, making the surface smoother and more even. The final appearance is slightly reflective, even if does not reach a mirror polishing such as that obtained with mechanical procedures.
As for the other polishing processes, this finish also increases the corrosion resistance and makes cleaning easier. The treatment is also able to remove small surface cracks or burrs, and eliminates small ferrous contamination. Electropolishing can also be applied to complex shaped objects where other techniques can not be used.
2.Electrolytic Coloring
This color effect is unique, because it does not use any kind of paint or pigment. The surface film of chromium oxide that gives stainless steel its resistance is transparent. Its thickness, as thin as a few atoms, allows light to pass easily. But if we increase the depth of this surface layer, interference phenomena filter the light rays. Certain wavelengths are absorbed and others are reflected, creating the distinctive colored effects. A similar phenomenon can be observed in soap bubbles or oil stains. By changing the viewing angle, the colors appear to change as well.
Austenitic steels are particularly suitable for this treatment. The number of colors that you can get is bronze, gold, red, purple, green. These color correspond to a superficial film ranging from 0.02-μm to 0.36-μm thickness. Ferritic steels, on the contrary, only acquire a dark gray color.
3.Stainless steel colored finishing
Since there is no pigment, the color is not degraded by UV rays and does not require maintenance. It is also resistant to mechanical machining without chip removal, such as bending. Along the outer edge of the bend, where the material is stretched, the film will become thinner and the color will be less intense. Since this surface layer is transparent, the underlying metal finish is important. For reflective colors we will necessarily start from a gloss finish. Welding and thermal cutting will damage the color, as well as scratches and abrasives. With embossed decorated sheets, removing the color in certain areas can generate contrasting effects.
4.Burnishing
We can get the color black by dipping the workpiece in a chemical bath of sodium dichromate. This process can be applied to any type of stainless steel. The surface is durable, does not flake, is resistant to heat light abrasion. Normally it is opaque, but can be made glossy by applying oils or waxes.
5.Acid etching
This artistic technique has been used for centuries to decorate metal plates. The surface is covered with a resistant substance that is removed in specific areas. The piece is then dipped in acid, which attacks the unprotected parts. The contrast between the exposed points and those left intact creates a pattern. Paints and electrolytic coloring can be applied before or after the process, depending on the desired effect.
6.Painting
The stainless steel does not need to be protected with paint, which only has aesthetic reasons. In some cases, it is applied to improve the visibility. Steel can also be purchased in pre-painted sheet or coil. Often it is protected by an adhesive film which is removed after processing.
7.Physical vapor deposition(PVD)
This technique allows to deposit very thin films of material on a substrate. The coating material is heated within a vacuum chamber until it evaporates. The atoms are deposited on the workpiece to be coated and form a uniform layer. With this system you can apply various colors that are very resistant and that do not change with the viewing angle. The colors obtainable are gold, bronze, rosé gold, blue, black, burgundy.
8.Metallic coating
We can combine the corrosion resistance of stainless steel with the aesthetics of another metal, such as copper or tin. The coating is usually applied by galvanic processes. This layer can be damaged by scratches or wear and tear, but the underneath stainless steel is not affected.
JINBAICHENG METAL MATERIALS LTD. is Manufacturer & Exporter of stainless steel coil /sheet/plate/strip.
We have customer from Philippines, Pune, Bengaluru, Dahej, Thane, Mexico, Turkey, Pakistan,Oman, Israel, Egypt, Arab,Vietnam, Myanmar, India.
Website: https://www.jbcsteel.cn/Product/971758761582358528.html
Email: lucy@sdjbcmetal.com jinbaichengmetal@gmail.com
Post time: Nov-17-2022