First of all, the corrosion resistance of stainless steel depends on its alloy composition. Among them are Cr, Ni, titanium, silicon, and manganese.
However, Cr is decisive for the corrosion resistance of stainless steel.
Secondly, “8” refers to the proportion of alloy in stainless steel.
For “K”, it refers to the reflectivity grade of the processed stainless steel. Among them, K is the mirror grade.
By the way, mirror 8K stainless steel has two types: single-sided and double-sided.
Mirror grade of mirror 8K stainless steel coil
Regarding the mirror grade of stainless steel, there are 6k, 10k, 12k.
Moreover, the larger the number, the greater the fineness of the mirror:
6K refers to the rough grinding and polishing mirror panel. And its effect is a little worse than the mirror;
10K refers to the finely ground and polished mirror panel. And its reflectance is similar to that of an ordinary mirror;
And 12K refers to the ultra-fine grinding and polishing mirror panel, which can meet optical applications.
However, this grading standard is not uniform. As long as the brightness is greater, the reflectivity is greater, and the surface defects are less, and more people like this mirror stainless steel.
Therefore, people regard stainless steel with the same brightness as 8K stainless steel.
Then, why do people want to polish the surface of stainless steel?
The difference between 8K mirror stainless steel and 12K mirror stainless steel
Usually, mirror stainless steels have been extended to 8K, 10K, 12K, due to the difference in the degree of fineness required by customers, they are “defined” as the larger the number, the higher the fineness of the mirror surface.
6K refers to the rough grinding and polishing mirror panel, which is less effective than mirrors; 10K refers to the fine grinding and polishing mirror panel, which can be comparable to ordinary mirrors; and 12K refers to the ultra-fine grinding and polishing mirror panel, which can meet optical applications.
Mirror stainless steel plate is a popular decoration material. Its second-largest sales volume of a stainless steel plate which was quite strongly welcome by consumers. However, with a high demand for mirror stainless steel in the market, the quality has become the biggest problem for most buyer and supplier
Why does stainless steel need 8k surface treatment?
The processing of stainless steel into 8K stainless steel enhances its performance:
- Surface brightness
- Surface reflectance
- Corrosion resistance
Moreover, this reduces the coefficient of friction and surface stress.
Then, what is the specific production company of Mirror 8K stainless steel?
Mirror 8K stainless steel production process
The basic plates of Mirror 8k stainless steel are mostly 2B and BA.
it is necessary to mix the grinding liquid during the product process: mix water, nitrate acid, iron-red powder, etc. according to a certain ratio to make a grinding liquid.Moreover, the better the ratio is deployed, the higher the quality of the product
First step – Rough polishing
Rough polishing is generally done with water. Moreover, it uses six sets of grinders. Then, people arrange the grinding wheels in order from coarse to fine to grind stainless steel. This can remove defects such as roughness, burrs, and trachoma on the surface of stainless steel.
Moreover, the grinding has a certain depth, most of which are within 2c.
After obtaining a certain extent in this way. And then, people finely polish it.
Second step – Fine polishing
This group of grinding machines uses high-density wool felt. Moreover, the higher the density of wool felt, the better. Then, people add slurry.
This removes the oxide layer, sand marks, grinding headlines, etc. on the surface of the stainless steel. Therefore, it improves the luminosity of stainless steel. Moreover, the finely polished stainless steel can reflect the details of the article.
Third step – Washing and drying
After polishing, people use a brush dipped in clean water to clean the surface of the stainless steel. Moreover, the finer the brush, the cleaner the water and the cleaner the product.
Then, people use a baking lamp to dry the water on stainless steel.
Fourth step – Quality inspection
After processing the surface of stainless steel, people also need to check the breadth of stainless steel, blisters, dark bones, scratches, and whether the product is deformed, and whether the grinding head is within the standard range.
Otherwise, the quality of the product is not up to standard.
The final step – Packing with protective film
The finished mirror is 8k stainless steel, and people will put a protective film on it.
Moreover, stainless steel cannot leak edges, and the protective film must be cut neatly.
And then, people can pack the finished mirror 8K stainless steel in a box.
The production process of double-sided mirror 8K stainless steel coil
The production process of the double-sided mirror 8K stainless steel is the same as the above.
However, when people grind stainless steel, they have to use the same size pad as a base. This prevents scratches on the other side.
Moreover, after putting a protective film on the polished side, polish the other side.
However, after people polished the second side, the protective film on the first side was dirty. Therefore, after people have finished grinding, they must re-attach the protective film to the first side.
To sum up, compared to a single-sided mirror 8K stainless steel coil, the double-sided mirror is more time-consuming. Moreover, its cost is relatively high.
Therefore, its price is about 3 times more expensive than the single-sided processing fee.
In addition, people can also colour mirror 8K stainless steel coil.
Similarly, its methods are as follows:
People use electrolyte to attach a metal film to the surface of coloured stainless steel.
Moreover, this can play a role in preventing corrosion, improving abrasion resistance, conductivity, light reflection and improving aesthetics.
People put stainless steel in an aqueous solution. Then, the ions on the surface of the stainless steel will continue to appear on the auto-catalytic surface. This forms a metal coating.
In this process, fluororesin is the main film-forming substance.
People spray the paint on the stainless steel plate in the form of mist. As a result, stainless steel has different colours.
Mirror stainless steel melting point
In addition to the above process, in the processing of stainless steel, people have to control the melting point of the mirror surface 8k stainless steel coil.
As for the melting point of mirror 8K stainless steel is to burn the 8K mirror stainless steel coil red. This temperature needs to reach 400 degrees.
Moreover, it has nothing to do with the surface of stainless steel. But with the composition of stainless steel and the content of these components.