Can copper be used with 20% dilute sulfuric acid? What about stainless steel 316L? If that doesn’t work, then what material is suitable?
Thread Content
Can copper be used with 20% dilute sulfuric acid? What about stainless steel 316L? If that doesn’t work, then what material is suitable?
Steel-lined PE, relatively inexpensive
I have copper pipes and 316L stainless steel pipes available; the others are expensive. I was wondering if copper and 316L will work?
I have copper pipes and 316L stainless steel pipes available; the others are expensive. I was wondering if copper and 316L will work?
I have copper pipes and 316L stainless steel pipes available; the others are expensive. I was wondering if copper and 316L will work?
Dilute sulfuric acid is even more corrosive than concentrated sulfuric acid; it is appropriate to use non-metallic materials for corrosion protection. For low-pressure pipelines, PE and PP can be used, as well as steel lined with PE or PP.
Copper – you don’t know until you’ve used it. 316 is okay for short-term use, but it’s not reliable. What are you good for? Pipes?
Copper refers to copper sulfate; 316L steel is not suitable for dilute acids, and even for acids with a concentration of over 90%, it must be at room temperature. 20% dilute sulfuric acid can only be handled with fluoroplastic or stainless steel linings, or Hastelloy.
Copper refers to copper sulfate; 316L steel is not suitable for dilute acids, and even for acids with a concentration of over 90%, it must be at room temperature. 20% dilute sulfuric acid can only be handled with fluoroplastic or stainless steel linings, or Hastelloy.
Doesn’t copper not react with acids? How can copper sulfate be formed then? ? ?
Theoretically, it shouldn’t work, because the standard reduction potential of copper is even more negative than that of hydrogen; therefore, pure copper does not react with acids. However, in practice, neither the reaction temperature nor the concentration is standard; copper also contains impurities, and copper on different crystal faces can be considered as impure copper as well. The oxidation potential will change, and a corrosion galvanic cell will form in acid, resulting in a overpotential. At this point, it is necessary to compare the reduction potentials of copper and hydrogen again.