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  1. debut78

    Pickling Bath for Stainless Steel S32304 (Duplex)

    ok. i thought that could be mixed with the bath! Can you arrange please the source for the chemical brightening solutions?
  2. debut78

    Pickling Bath for Stainless Steel S32304 (Duplex)

    so, they can be added with the N+HF acids in the pickling bath?
  3. debut78

    Pickling Bath for Stainless Steel S32304 (Duplex)

    Hi there Ed, Do you have anything about the brightening solutions? Is there a "solution" to use with the bath? maybe it will be use in the process so if we can make it easy and spend less time the better. Is one operation less. But we want a good finish / bright in the piece, so if you have any...
  4. debut78

    Pickling Bath for Stainless Steel S32304 (Duplex)

    Hi again. I want to ask one more thing: I want to use a SS duplex piece to an exposition (show it to our costumers) and i wonder if there is any product that can be used to brigth the piece after pickling, to make it more pretty! Something that can be add to the bath or used after the bath...
  5. debut78

    Pickling Bath for Stainless Steel S32304 (Duplex)

    so, using only H+NF the result won't be the same as using 2 baths! that's understandable! I will present the 2 options and then will see! About the tanks! its huge, indeed! 15m³ it's a lot! with that i surely could pickle almost all the parts only in one time! :) I'm talking about parts that...
  6. debut78

    Pickling Bath for Stainless Steel S32304 (Duplex)

    For this specific SS (duplex) with 23% of Cr the pickleability is difficult (is 3 being 4 the max). To get an uniform bath we must use a part agitation to do that, i agree. So overall the time to pickle should be at the maximum around 65min. Its many time to pickle one piece! I don't have the...
  7. debut78

    Pickling Bath for Stainless Steel S32304 (Duplex)

    The pickling is for parts that will be produce! If with 2 baths we can reduce the time of pickle then its an option! The time here is an important factor! So if using the 2 baths, do you have an idea of the time for each bath considering the temperature of 120F? And for the 2nd bath, do you know...
  8. debut78

    Pickling Bath for Stainless Steel S32304 (Duplex)

    In this case the % of Cr is between 22-24%. I will use the TIG weld process! So for this type of SS i should use first the HF & sulfuric (15% & 3%)and then N & HF? But in this way i must use 2 baths? Thanks
  9. debut78

    Pickling Bath for Stainless Steel S32304 (Duplex)

    Hi there, I have a question for about pickling bath for a stainless steel duplex! I know that the solutions of nitric (HNO3) and hydrofluoric (HF) acids are used but i have a doubt about the % of each that must be used! i searched the web and i found some information but isn't enough explicit...

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