What are Electroplating Chemicals?
Electroplating chemicals are a collection of chemicals used in electroplating wastewater treatment and the electroplating industry. Depending on the characteristics of the wastewater as well as the input materials, different chemicals will be applied to ensure the required output quality.

In general, wastewater streams in the electroplating industry can be classified into four groups:

• Chromium-containing wastewater
• Nickel-containing wastewater
• Cyanide-containing wastewater
• Zinc-containing wastewater

Some chemicals supplied by Vu Hoang for the electroplating industry include:

• VH 101 – 25–30%
• Hydrochloric Acid HCl – 32–35%
• Sulfuric Acid H2SO4 – 98%
• Caustic Soda (Liquid NaOH and Flake NaOH)
• Lime Ca(OH)2 – 90%
• Acetic Acid CH3COOH
• Hydrogen Peroxide H2O2
• Citric Acid C8H8O7
• Sodium Sulfide Na2S
• Ammonium Chloride NH4Cl
• Oxalic Acid H2C2O4
• CuSO4·5H2O
• Boric Acid H3BO3
• Tin(II) Sulfate SnSO4
• Phosphoric Acid H3PO4

Advantages of using electroplating chemicalsư

• Electroplating creates a thin protective layer on the surface of metals, which not only improves their durability and lifespan but also enhances their natural appearance.
• Improves metal durability
• Enhances aesthetics
• Restores metal to its original state
• Adjusts the conductivity of the metal

Metal surface treatment methods
To ensure electroplating chemicals firmly adhere to the metal surface, thorough surface treatment must be carried out before plating. The cleaner and smoother the surface, the better and more durable the electroplated finish will be. Currently, three popular metal surface treatment methods are:

• Electrochemical method:

This method uses electrochemical cleaning solutions such as alkaline solutions, sodium hydroxide, etc.

• Electropolishing method:

Mainly applied to metals such as copper, stainless steel, and alloys. In this method, metals are processed in viscous solutions mixed with strong acids. The higher the viscosity, the smoother and shinier the surface becomes.

• Passive coating method:

Commonly applied to metals such as zinc, tin, and aluminum. The metals are immersed directly in chromate or phosphate solutions to form an oxide layer on the surface.

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