No passwords, No popups, No cost, No AI:
we earn from 'affiliate link' purchases, making the site possible

Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing since 1989

-----

Difference between electropolishing and pickling Inconel 718

Can someone tell me the difference made to the surface of Inconel 718 when it is electropolished vs. pickled. We weld 718 and the key to a good weld that doesn't leak is a pristine surface. We were having leaks through weld doing pickling so switched to electropolishing as a cleaning method. Seemed to work for a while then the leaks came back. Switched to a double pickle, one right after the other and so far so good but would really like to understand what is going on at the surface between the two systems. We also did a test with scotchbriting the surface and got very good results. I know the presence of Ti and Al in 718 make it difficult to weld. Is on of these surface prep methods removing more Ti and Al than the other? Anyone have any theories. Thanks

Tino Volpe
Metallurgical engineer - Wrentham Massachusetts USA
September 15, 2011

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: