As a member of the eBay Partner Network & Amazon Affiliate we receive compensation for qualifying purchases

Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989





-----

Unable to etch part # on Black Oxide




I received a batch of 3000 pieces of our wire wrapping sleeves from a new vendor. We electro-etch our part number on this part. We have never had any problem with this operation. On this batch, instead of taking about 1 second for the etching, we take over ten seconds and don't get a good part number. The only difference I can see is the heat treat and black oxide vendor. The material is 4130 steel tubing, heat treated to 83-86 on the N15 scale (50-55 Rc) and given a black oxide finish. We usually induction heat treat this part, but this time it was hardened in an oven in a 35% Carbon Dioxide atmosphere. Is it possible that the surface resistance of the steel has changed somehow?

Thanks-

Roy Menzel
- Yonkers, NY - USA
2000


Roy - Another possible explanation is that the black oxide shop is using a black oxide that has better penetrating abilities and/or is leaving them in the bath longer to form a thicker black oxide layer. Check with the vendor to see if they process differently than what you were accustomed to.

Dan Brewer
chemical process supplier - Gurnee, Illinois
2000




(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:

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


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