How to perform acid washing and passivation to remove the color from stainless steel after welding, or when the weld is too high and needs to be ground down?
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Thank you to all the teachers for helping to answer the questions.
The fillet weld area can be coated with pickling paste and then cleaned.
Please tell me the specific method, how to apply it and clean it. Thank you, teacher.
Operation method: 1. Use an acid-resistant brush to apply the pickling paste (stainless steel passivation paste) evenly over the surface of the workpiece. 2. The processing time is 3-8 hours. 3. Rinse with clean water after processing. 4. Rinse again with alkaline water.
The oxidation colors on welds and heat-affected areas can be removed using a cleaning paste designed specifically for welds.
Before acid cleaning and passivation, clean the welds with a stainless steel wire brush, then apply the acid cleaning and passivation paste. How long must wait before cleaning the welds again? Thank you all!
It usually takes less than 30 minutes. Be careful not to expose it to sunlight after coating, otherwise the pickling effect will be poor.
I have a weld bead processor; it can handle everything.