
Chromium (Cr) is a hard, lustrous, steel-gray metal that belongs to the transition metal group on the periodic table. It is highly valued for its ability to resist corrosion and for its hardness. Chromium is primarily used to harden steel, to produce stainless steel, and to form protective coatings on metal surfaces through a process known as chrome plating.
Key Properties of Chromium:
- Symbol: Cr
- Atomic Number: 24
- Melting Point: 1,907°C (3,465°F)
- Density: 7.19 g/cm³
- Oxidation States: +2, +3, and +6 (the +3 and +6 oxidation states are the most common)
- Corrosion Resistance: One of the most notable properties of chromium is its ability to form a thin oxide layer, protecting it from rust and corrosion.
Siman Ltd offers the following chrome based products:
- Chromium(VI) Oxide (CrO₃):
• Also known as chromic acid or chromium trioxide, it is a strong oxidizing agent and is primarily used in chrome plating to produce a shiny, protective layer on metals.
• It is a key component in the anodizing process of aluminum, enhancing the metal’s corrosion resistance.
- Chromium(III) Oxide (Cr₂O₃):
• Known as chromia or chrome green, this oxide is widely used as a pigment due to its bright green color and stability. It is used in paints, ceramics, and glasses.
• Employed in the production of refractory materials (materials resistant to heat) and in the metallurgical industry as a coating to improve corrosion and wear resistance.
• Used in abrasive applications like polishing, due to its hardness.
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