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Topic: What metal should be used to fabricate a storage tank for 98% sulfuric acid?

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What metal should be used to fabricate a storage tank for 98% sulfuric acid? I have heard that mild steel would be acceptable.  Is mild steel okay for storage of 98% sulfuric acid  at  45 to 50 °C? 
  • Avatar Brian Dalder Forum Moderator 177 Posts

    Re: What metal should be used to fabricate a storage tank for 98% sulfuric acid?

    Sulfuric acid is a tricky chemical to deal with since its corrosivity varies with concentration, temperature, impurities, and velocity; sometimes in unexpected ways. According to MTI Publication 1: Materials Selector for Hazardous Chemicals: Sulfuric Acid, glass-lined steel or a high-silicon stainless steel would work. You may want to get further and more detailed guidance from one of the many references and standards published on this subject.

  • Re: What metal should be used to fabricate a storage tank for 98% sulfuric acid?

    anonymous
    Having designed a couple of 98% sulfuric acid off-loading and storage systems, I learned that the question is much more complex. I recommend first studying the issues related to the concentrated acid, then get as good an understanding of the use, rate of consumption, siting issues, etc., that you can. Mild CS can work fine. Kynar might be the right way to go. But there is no standard answer. One good and readily available reference is http://www.sulphuric-acid.com/techmanual/Storage/storagetanks.htm