Stainless steel surface treatment - Principle of stainless steel pickling and passivation
Stainless steel surface cleaning, pickling and passivation not only maximize the corrosion resistance, but also prevent product contamination and achieve aesthetics. In B-"Steel Pressure Vessels" it is stipulated that "the surface of containers made of stainless steel and composite steel plates with anti-corrosion requirements should be pickled and passivated." This regulation is for pressure vessels used in the petrochemical industry because these equipment are used in situations where they are in direct contact with corrosive media. In order to ensure corrosion resistance, pickling and passivation are necessary. For other industrial sectors that use stainless steel materials not for anti-corrosion purposes but only for cleanliness and aesthetic requirements, there is no need for pickling and passivation. However, the welds of stainless steel equipment also need to be pickled and passivated. For nuclear engineering, some chemical equipment and other applications that have strict requirements, in addition to pickling and passivation, high-purity media must be used for final fine cleaning or finishing treatments such as mechanochemistry and electrolysis.
Advantages of stainless steel surface treatment - stainless steel pickling and passivation:
Remove the yellow, blue, black weld spots and other contaminants produced after welding of various types of austenitic stainless steel workpieces, such as weld spots, rust spots, and oxide scales. things. Environmentally friendly, chromium-free; does not contain hexavalent chromium components such as chromate. Excellent salt spray and corrosion resistance, the highest has passed the neutral salt spray test
2. Simple operation, convenient use, economical and practical; especially suitable for small and complex workpieces.
3. After treatment, the workpiece will be uniformly silvery white and bright, which is highly decorative.
4. It does not contain harmful ingredients. It is acidic and does not irritate the skin. It provides excellent cleaning performance and protects the user's health. And the treated waste liquid only needs to be neutralized and then directly discharged to achieve zero pollution to the environment
Stainless steel surface treatment-stainless steel pickling passivation
Stainless steel surface treatment stainless steel pickling passivation stainless steel pickling passivation solution
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Stainless steel surface treatment-stainless steel pickling passivation