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  1. forough64

    lead smelting

    thank you all. the scope of efficiency is production efficiency of lead, not heat efficiency. thanks for your Honestly worries, but the pollution and injurious effects is not my subject. I like to use your knowledge in smelting and purification lead process. thanks alot.
  2. forough64

    lead smelting

    hi guys, we use a rotary furnace to smelting and purification lead metal but it has very low efficiency. please guide me which the effective factors to improve the efficiency. thanks a lot
  3. forough64

    reaction of iron ions and passive layer of stainless steel

    Thank you so much sir
  4. forough64

    reaction of iron ions and passive layer of stainless steel

    picture of the ss316 parthttps://files.engineering.com/getfile.aspx?folder=11c3d9dc-fabb-437b-8aee-07dd43bcf1a4&file=IMG_8407.JPG
  5. forough64

    reaction of iron ions and passive layer of stainless steel

    Thanks dear 0707 unfortunately, we didn't remove any surface containment, but it's important for me to know that "can the iron ions in fluid which comes from cast iron and carbon steel parts, hurt the passive film?"
  6. forough64

    reaction of iron ions and passive layer of stainless steel

    Dear EdStainless the stainless steel part was put in a cast iron tower.Because of sever corrosion of tower body, existing of iron in fluid is normal. I think that this iron ions in fluid has an important role in the rupture of passive film and the corrosion of ss316. Are you agree?
  7. forough64

    reaction of iron ions and passive layer of stainless steel

    Thanks alot. there is just general corrosion in surface, no pitting. as I know, ammonium carbonate and ammonium chloride in concentrate below 15% is not very corrosive for ss316. But the fluid contents a lot of free iron . Do you have information about the reaction of iron ions with passive...
  8. forough64

    reaction of iron ions and passive layer of stainless steel

    Hi guys we use stainless steel ss316 in aqueous content of iron ions. after 2 years, SS316 corrosive severely. I want to know how does attack iron ion to chromium oxide in SS316? or What is the mechanism of rupturing passive layer in contact of iron ions? Thank you so much

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