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  1. mead

    Chemical Injection

    Hello All, I am working on the design of a chemical injection system and have a few questions (the system is for injecting iodine into a water stream). Would it be better to have the injection point in the side or the top of the water pipe? If it is in the top of a straight run of water pipe...
  2. mead

    Critical Pitting Temperature (CPT)

    Hello all, I have some questions relating to how to interpret CPT data. 1. Can the CPT be viewed as a maximum value to not go beyond? If you stay below the CPT, no pitting? If you go above does breakdown automatically occur? 2. I know that CPT test are done with a 6% ferric chloride...
  3. mead

    Corrosion rate of carbon & stainless steel in 10% HCl

    Mcguire - I do not know how to post to a website, but I would very interested in the presentation. Any chance you would e-mail it to me. My company is experiencing alot of stainless steel corrosion problems right now. I have been designated to get smart on the subject quickly. Any help would...
  4. mead

    PREN equation

    My thanks to all for the helpful information. The responses have put another question in my mind. mcguire - Can polishing of electro-polishing (in order to obtain desired surface roughness)in 316L expose surface sulfides? Also, I am looking for reference information that puts forth a maximum...
  5. mead

    PREN equation

    I have seen the formula for pitting resistance equivalent number (PREN) presented with different values of the multiplier for percent Nitrogen. I have seen 13,16 and even 30 used. Which is correct. Also, Does anyone know where this formula was first presented? Was it by ASTM, ASM, NACE...
  6. mead

    Stainless Steel containing NaCl solution

    We are considering an epoxy coating but are a little hesistant because the products stored in the tank are food grade and kosher. That limits the selection of coatings we have been able to find. ANy suggestions would be appreciated.
  7. mead

    Stainless Steel containing NaCl solution

    Does anyone have any practical experience lining an existing tank with teflon, etc.? ANy companies that do this kind of work? This tank is cooled and can go from 0-70 degrees C, any thoughts on if the teflon will expand contract with the tank? Thanks
  8. mead

    Stainless Steel containing NaCl solution

    Hello, We have an application at our plant that calls for storage of a product solution that is 18% NaCl at temps up to 70 deg C. Our existing 304L and 316L storage Tanks are exhibiting alot of pitting corrosion. Any thoughts on a good stainless alloy to look at for this application, possibly...

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