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  1. dhdz187

    Stains,what is the probable cause?

    Hi Bruce, Thank you very much for your patience and help on this issue. Your analysis is convincing and easy to understand. So we will discuss with our customer as per your advice of blowing the blind holes between their operations. Now,our sales team are doing two experiment, one is...
  2. dhdz187

    Stains,what is the probable cause?

    for sure,fastener is stainless steel with silver plating, THat is only what I can confirm now.
  3. dhdz187

    Stains,what is the probable cause?

    Sorry, I am on a leave during the past days? Could we back to this topic again ? This issue has been communicated to our boss,it is very serious.My team need to solve it quickly. Since customer insisted that the problem is at our side(machining process), not at beadblast process. So could...
  4. dhdz187

    Stains,what is the probable cause?

    Actually we think the problem is not our problem,but we have no evidence to prove it. Customer should balsting the parts by dry blasting. it is a cycle use part, blasing - putting into use - acid cleaning - blasting - putting into use - acid cleaning,keep doing this loop until the parts can't...
  5. dhdz187

    Stains,what is the probable cause?

    As you said, staining should be found at any area that has a chemical reaction, but it only found near the threaded holes.
  6. dhdz187

    Stains,what is the probable cause?

    As you said, staining should be found at any area that has a chemical reaction, but it only found near the threaded holes.
  7. dhdz187

    Stains,what is the probable cause?

    We are serving an aluminum parts for our customer, it is a part that used in hard disk industry. the material is AL6061-T6 and beadblast is required at customer side after all machining process finished. We only do machining process,and beadblast is done by customer. The problem now is that...

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