Electrolytic Manganese Flakes

Physical Properties:

Silvery-gray appearance with brittle texture

Density: 7.21–7.44 g/cm³

Melting point: 1,246°C (2,275°F)

Good thermal/electrical conductivity

Chemical Properties:

Reactive with oxygen and water (forms oxide layers)

Dissolves in acids (e.g., sulfuric acid)

Oxidation states from -3 to +7 (+2 and +7 most common)

Electrolytic Process: Most common method where Mn²⁺ ions from manganese sulfate solutions are reduced on cathodes, forming high-purity flakes.

Thermal Reduction: Silicothermic or aluminothermic reduction of manganese ores (e.g., pyrolusite).

Atomization: Less common, produces finer flake particles.

Industrial Applications

Steel Production (90% of global demand):

Deoxidizer and desulfurizer

Key alloying element in stainless steels (8–15%) and high-strength alloys

Aluminum Alloys: Enhances corrosion resistance (e.g., 3000-series alloys).

Batteries:

Lithium-ion cathodes (LiMn₂O₄)

Alkaline battery depolarizer

Chemical Industry:

Precursor for Mn compounds (e.g., MnSO₄, KMnO₄)

Water treatment (oxidation agent)

Specialized Uses:

Welding rod coatings

Electronic components (ferrites)

Common specifications include:

ASTM A99 (standard grade)

DIN 1756

Purity grades: 99.7%, 99.9%, 99.95%

Store in dry, ventilated areas (moisture-sensitive)

Use inert gas (Ar/N₂) for high-purity applications

PPE required due to dust flammability (risk of Mn fume fever)

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