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Stainless Steel Plate sheet 304N Customized 4*8 Feet Plates 304 2.0mm 4.0mm 5.0mm 6.0mm
Surface Coloring Treatment
Endow stainless steel products with various colors, increase the variety of designs and colors of products, and improve the wear resistance and wear resistance of products.
Stainless steel coloring method: form a certain thickness of oxide film on the surface of stainless steel
a dyed black
This method is used for small parts such as camera parts and precision machinery. It is a method of immersing parts in molten salt at about 400°C to form an oxide film and a method of black film with sulfuration.
b tempered color
When stainless steel is heated at 300-900°C in the atmosphere, the thickness of the oxide film changes with the heating temperature, and interference colors appear to show various colors. The golden yellow has been used in motorcycle mufflers.
C INCO coloring This method is a method of chemically making a transparent oxide film, its thickness is about 0.1~0.3um, and the passivation film is 0.001um. Controlling the thickness of the oxide film can show various unique colors,
Use in bathtubs, etc.
Product of description
Surface condition of stainless steel
430 stainless steel
430 stainless steel
As will be discussed later, various commercial finishes have been developed to meet the aesthetic requirements of architects. For example, the surface can be highly reflective or matte; it can be glossy, polished or embossed; it can be colored, colored, plated or etched with patterns on the surface of stainless steel, or brushed, etc. To meet the various requirements of designers for appearance.
Keeping the surface is easy. Dust can be removed with just occasional rinsing. Due to the good corrosion resistance, graffiti contamination or similar other surface contamination on the surface can also be easily removed.
The following methods are often used in engineering to prevent intergranular corrosion:
(1) Reduce the amount of carbon in the steel, so that the amount of carbon in the steel is lower than the saturation solubility in the austenite in the equilibrium state, which fundamentally solves the problem of the precipitation of chromium carbide (Cr23C6) on the grain boundary . Usually, the amount of carbon in steel can be reduced to less than 0.03% to meet the requirements of intergranular corrosion resistance.
(2) Add Ti, Nb and other elements that can form stable carbides (TiC or NbC) to avoid the precipitation of Cr23C6 on the grain boundary, which can prevent intergranular corrosion of upper austenitic stainless steel.
(3) By adjusting the ratio of austenite-forming elements and ferrite-forming elements in the steel, it has an austenite + ferrite dual-phase structure, of which ferrite accounts for 5% to 12%. This duplex structure is not prone to intergranular corrosion.
(4) Appropriate heat treatment process can prevent intergranular corrosion and obtain the best corrosion resistance.
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