F-58 High-Efficiency Anodic Corrosion-Free Hard Chrome Additive

The current density range is wide, allowing operation at currents as high as 60 A/dm² or more.

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Detailed description:

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The cathodic current efficiency reaches as high as 22–27%. The deposition rate is rapid, enabling approximately a 40% reduction in electricity costs.

Fluoride-free, rare-earth-free, and free from cathodic low-current‑area corrosion.

It does not severely corrode lead–tin anodes and therefore eliminates the need for special anode materials.

Excellent surface finish and superior uniform plating capability.

The coating exhibits high hardness, reaching over HV1000.

It can generate microcracks, with a density of up to 400 cracks per centimeter, thereby enhancing corrosion resistance.

The current density range is wide, allowing operation at currents as high as 60 A/dm² or more.

The coating exhibits excellent adhesion to the substrate, and even in small, intricate areas, it does not peel off.

Its wear resistance is three times that of conventional chromium-plating solutions.

Process formulation and operating procedures

Raw material	Scope	Best
Chromium trioxide (CrO3)	180–300 g/L	250g/L
Sulfuric acid (H2SO4)	2.0–3.5 g/L	2.7g/L
F—58 Chrome Plating Additive (Tank Start-Up)	16–20 ml/L	20ml/L
Current density	30–80 A/dm²	40–60 A/dm²
Temperature	55–65℃	60℃
Anode area ratio to cathode area	2:1—3:1
F—58 consumption amount	For every additional kilogram of chromium trioxide added, 30–40.
	Milliliters of F-58 additive