Metal Etchant


Ni etchant (acid treatment before and after plating & painting)

ST-300 is developed to be used in acid treatment before painting and plating process of Alloy 40. ST-300 remarkably lowers excessive corrosion on equipment and harmful affection to human body.


• Nearly no corrosion and irritation on the equipment and human body
• Provides clean surface with outstanding cleaning power
• No excessive corrosion and erosion occur on metal
• Does not generate HF gas and shows stable cleaning power

[ Properties and method ]

Appearance  Light yellow transparent liquid Concentration 20~50% diluted in water
Odor Unique odor Temp. Room temp. ~ 50 ℃
pH(10%) 2.0 ± 0.5 Method Dipping, dipping ultrasonic
S/G (g/ml) 1.2 ± 0.02 Packing 20L (pail) / 200L (drum)

※ Smut which is generated from dipping can be removed by dipping ultrasonic with D.I. water