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Recent content by strider6

  1. strider6

    316L gasket failure

    "Metal to metal seals that may be exposed to sea water without cathodic protection should be made in corrosion resistant alloys such as UNS R30035, R30003, Alloy 625 and Alloy C276. Generally, metal to metal sealing materials shall be more corrosion resistant than surrounding surfaces."[NORSOK...
  2. strider6

    Corrosion rate in sour service

    You can find a lot of useful papers on corrosion in oil&gas in these websites: http://www.corrosioncenter.ohiou.edu/publications/...
  3. strider6

    17-4 PH and NACE MR 0175

    MaxCarb If you need to select a material for sour service you need to calculate the partial pressure of H2S and you need also to take into account other factors like the temperature, chloride conc and presence of elemental sulphur. You shall also tale into account all the possible corrosion...
  4. strider6

    Galvanized steel or CuNi pipe for sea water system on boat?

    Galvanized steel in a seawater service is not a good material selection, unless you plan for frequent maintenance. However the corrosion rate depends also on the exposure time to seawater, temperature. Welding galvanized steel and thinking to touch up the weld inside the pipe seems an impossible...
  5. strider6

    Recommend some experts on Super Duplex SS

    Try with: http://www.outokumpu.com/ http://www.outokumpu.com/applications/upload/acom_10292653.pdf?docid=681 hope this help V. Corrosion Control
  6. strider6

    Material choice for water pump impeller

    I agree that carbon steel is not an option and you should go at least to the Ni resist, or improve to higher alloy, but you should define better what you mean with "nasty fluid" if you want to make a good material selection...
  7. strider6

    GALVANIC CORROSION

    It's likely that you'll have some corrosion on steel, but is not possible to say how long it will resist. Galvanic corrosion is a function of several different factors and the difference in potential of the two metals is just one. If you want to avoid galvanic corrosion you should avoid...
  8. strider6

    SS vavle in CS piping

    You should consider: -external surface in contact with atmosphere -internal surface in contact with fluid (crude) SS is a general classification and depensing on fluid composition, operating temeperature and external exposure (marine, rural..) you need to select the correct type of SS. Vic...
  9. strider6

    A325 & A490 Type 3 Bolts - Galvanic Corrosion

    i would say no, there will be no galvanic corrosion, however you should also consider the type of exposure. Is it a marine atmosphere or seawater immersed? Regarding the coupling of galvanized and weathering steel i've found an article from NACE, here below is the main conclusion: "Overall...
  10. strider6

    Corrosion in Galvanized Piping with glycol

    Here are some data on corrosion of galvanized steel in contact with chemicals: http://www.galvanizeit.org/images/uploads/pdfs/corrosion_organic.pdf You can also contact the Galvanizeit.org and ask for more data: "If you would like assistance in determining the reactivity of zinc when exposed...
  11. strider6

    Galvanic corrosion between CS and Duplex

    what kind of water in the tubeside? seawater, production, freshwater? S Corrosion Control
  12. strider6

    Is Hot Dipped Galvanized Necessary For Submerged Steel Shackles

    These tables show the corrosion rates of Zinc and Zinc-Coated Steel in Sea Water: http://www.galvanizeit.org/aga/about-hot-dip-galvanizing/how-long-does-hdg-last/in-water http://www.galvanizeit.org/aga/about-hot-dip-galvanizing/how-long-does-hdg-last/in-water/water-corrosion-data//#seaWater...
  13. strider6

    Sea Water Intake Lines

    Steve, Experience is something that is not possible to teach.. You're right, i didn't think that in some areas of the world the seawater temperature can reach that values... thanks for your help all the best Vitt Corrosion Control
  14. strider6

    Sea Water Intake Lines

    Steve It was not a lucky guess but just a simple suggestion based on the assumption that if the service is a Sea Water Intake Lines then the operating temperature should be quite "low"... and as i said it was just a suggestion not a material selection report.. have a nice and lucky day S...
  15. strider6

    CATHODIC PROTECTION OF DUPLEX STAINLESS STEEL

    have a look also at: DESIGN OF DUPLEX STAINLESS STEEL SUBSEA EQUIPMENT EXPOSED TO CATHODIC PROTECTION http://www.dnv.com/binaries/RP_F112_tcm4-184069.pdf S Corrosion Control
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