No passwords, No popups, No AI, No cost:
we earn from your affiliate purchases

Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Adver-
tise
Help
Wanted
Current
Q&A's
Site 🔍
Search
ted_yosem
Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
finishing.com -- The Home Page of the Finishing Industry


  pub
  The authoritative public forum
  for Metal Finishing since 1989

-----

EMC spring get bubbled after zinc plating, look for solution, thank you!





We have a metal EMC spring(material:spring_steel_D 1.1200/DIN_2076), thickness 0.4mm, this EMC spring will weld on a metal box(Material:DC01 1.0330/EN10130), after the welding, will process blue zinc plating, but after the zinc plating, we find the EMC spring is easy get bubbled, can you please advise what is the problem and how to improve it, thank you very much!

Deng Tengle
buyer - China
February 11, 2009


Unfortunately, I am not familiar with your metal codes. Some springs have a high carbon % and are sensitive to BOTH under and over cleaning and BOTH under and over activation. The results will vary by metal, but undercleaning tends to have fewer but larger blisters. Over cleaning and Over etching both tend to have hundreds of tiny blisters. Under etching normally results in peeled plating, possibly in small areas and edges.

James Watts
- Navarre, Florida
February 12, 2009



February 13, 2009

Hello,

please check your pre-treatment and adjust to material. It seems that you a hydrogen diffusion into your material caused by excessive pickling and electrolytic degreasing times. Also might you have adjust your chemical composition with your supplier. Some inhibitors which reduces or eliminates completely the diffusion of hydrogen.

Heat treatment also would could be applied

Dominik Michalek
- Mexico City, Mexico




(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:

Finishing
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g,
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"