No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

17-4 Stainless fails copper sulphate test after laser mark and passivation




January 14, 2013

Q. We have an older lamp laser (CLC) that we still need for specific product lines. During recent validation tests of the laser mark, 17-4 seems to be the only material we can't get to pass a copper sulphate [on eBay or Amazon]test. Our fiber laser will pass the test with ease, on all material types. What can be done about this? A range of laser settings seem to have no affect. A barely there mark, and a dark deep mark will almost instantly fail a copper sulphate test.

59123

Is this to be expected? We are using Citrisurf 2210 for post laser passivation. The test coupons have been cleaned and passivated (citric) after being machined and polished.

Mike Sigwart
- Grafton, Wisconsin, USA


January 22, 2013

A. I don't normally see any laser marks that will pass a copper sulphate test, so it's good that you've got one laser that will get there. Laser marks are typically problematic to begin with, and the outcome seems to vary wildly depending on the grade of steel, the type of laser, and the settings on the laser.

If I had unlimited resources, I would run comparison tests across all variables and try to determine exactly what leads to better laser marks on stainless. It's a huge problem in the industry.

ray kremer
Ray Kremer
Stellar Solutions, Inc.
supporting advertiser
McHenry, Illinois
stellar solutions banner



adv.

Mike,

We suggest to do local electropolishing by universal electrolyte on the lasermark area. Contact us for more information.

anna_berkovich
Anna Berkovich
Russamer Lab
supporting advertiser
Pittsburgh, Pennsylvania
russamer labs banner
January 24, 2013




(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"