Email:jessy@jshengda.comWuxi Hengda Liquid-Purification Chemical Plant

Wuxi Hengda Liquid-Purification Chemical Plant

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Passivation Principle and Requirement Analysis of Environmental Protection Stainless Steel Pickling Gel

In the pickling passivation process, mainly occurred complete chemical reaction between the stainless steel surface of the metal components and stainless steel pickling gel,generate a very thick layer of oxide film on the surface of stainless steel.


Moreover, in the process of pickling and passivation, the stainless steel pickling gel can effectively remove the metal impurities such as iron on the surface of the stainless steel workpiece so as to transform the lively metal ions on the surface of the stainless steel workpiece into inert metal ions and effective prevention of local corrosion of stainless steel, it makes the surface has enough cleanliness.The size does not change after processing.


But in actual processing, in order to ensure that the final passivation effect, the oil on the surface of the stainless steel workpiece should to be cleared,keep the surface smooth and no have dent.Please remember, carburized parts and the nitride stainless steel can not be passivated.In fact, the operation of stainless steel pickling gel is relatively simple and convenient.


In general, the passivation effect achieved by the stainless steel pickling gel is not only related to the passivation process, but also has a lot to do with the quality of the stainless steel material.The first is that the element in the stainless steel itself has a certain effect on the passivation effect.In fact, the passivation ability of stainless steel depends on the passivability of the elements contained in the stainless steel itself.


Combined with the composition of stainless steel composition then analysis, which contains chromium and nickel elements belong to the more passivation elements, followed by the passivation of iron.Therefore, the higher the content of chromium and nickel, the stronger the passivation of stainless steel.Moreover, the stability of passivation film increases with the increasing of chromium nickel content.In other words, the higher the content of chromium and nickel contained in stainless steel, the better the treatment effect of stainless steel pickling paste.

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