For 400 grade stainless steel, 
manufactures 400 Series (Passive Protect).
400 series cleans, descales 400 grade of stainless steel.
passive protect is use for passivating and protecting 400 series of stainless steel.
Note:
Chloride content in rinse water should be less than 50 ppm.
Shake the products well before use.
Do not apply the products under direct sunlight.
Passivation is a must after every pickling process.
Passivation passivation protects the stainless steel from further corrosion. passivation is a must after every pickling process.
