As an Amazon Associate & eBay Partner: we earn from qualifying purchases
Mr. Rogers: "Look for the Helpers. You'll always find people who are helping."

Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Adver-
tise
Help
Wanted
Current
Q&A's
Site 🔍
Search
finishing.com -- The Home Page of the Finishing Industry


  -----

Protection of punched areas of GALVANNEALED (A60) material




I'm a mechanical designer. At our company we manufacture pre-fabricated weather-proof metal buildings. My question is, after we punch holes in our galvannealed (A60) panels, we deburr the punched area with a small hand sander (180 grit). I am concerned that we are damaging the A60 coating, please comment.

Ronald E. Davidson
- Canton, Ohio



Cold Galvanizing Spray
cold_galv_zrc
on eBay
or Amazon

(affil link)

 

You're not damaging it, Ronald, you're completely removing it from the punched areas. In benign environments that's not a big problem because the ganvanneal can sacrificially protect the exposed steel. But with the environment that a roof sees, and the probable retention of moisture under the fasteners, it's not a good situation. I would protect the exposed steel surfaces with cold galvanizing compound ⇦ on eBay or Amazon [affil link] , or somehow -- with lacquer, paint, mastic, or something.

Ted Mooney, finishing.com
Ted Mooney, P.E.

Striving to live Aloha
(Ted can offer longterm or instant help)
finishing.com - Pine Beach, New Jersey




(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  -  ©1995-2025 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"