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  • Users: ndsram
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  1. ndsram

    Which is better material for One way clutch system casing SAE 8615 (8620) or 20CrMo

    I have 2 materials for one way clutch system, SAE 8615 (modified C% 0.1-0.14 or 8620 - Nickel Chromium Molybdenum Steel) and 20CrMo. This clutch is being used in starter motor. I could see failure of 20CrMo (Chromium Molybdenum Steel) like the casing getting crack in one particular variant...
  2. ndsram

    How to test for good passivation/phosphating?

    HI, I wondering whether there is any test for testing the passivation on the surface of the metal. Normally Salt Spray Test has been carried out for testing coating on the surface of the metal, however when I asked my supplier who carry out passivation for our product, they replied that salt...
  3. ndsram

    How to test for good passivation/phosphating?

    HI, I wondering whether there is any test for testing the passivation on the surface of the metal. Normally Salt Spray Test has been carried out for testing coating on the surface of the metal, however when I asked my supplier who carry out passivation for our product, they replied that salt...
  4. ndsram

    Surface adhesion between phosphated metal surface and Polyester Resin

    HI All, I doing an exercise of surface adhesion property of phosphate passivated surface and polyester resin. During my process the passivation on my metal surface worn out and overwhich i'm using my polyester resin, so can anyone suggest me how to study/calculate this surface adhesion property...

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