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



-----

Priming / Painting Galvanized Gutters




Q. A simple question that I hope you will answer for me. I have just installed galvanized steel guttering on my home and want to know what preparation (priming) I need to do before painting. I have heard that vinegar [in bulk on eBay or Amazon] can be used to etch the surface. I also have muriatic acid [affil links]. What dilution? What type paint do you recommend?

Thank you very much for your help.

John Rohde
retired
1996



Self-Etching Primer
on
Amazon

(affil links)

A. Hi, John.

Muriatic acid will dissolve (ruin) the galvanizing quickly and should not be used.

Vinegar is not as strong, and some people find it helpful. Getting really good adhesion on galvanizing is difficult! The American Galvanizers Association at www.galvanizeit.org has some info, but TSP ([on eBay or Amazon]) and a [on eBay or Amazon], possibly followed by the vinegar, and definitely followed by a Galvanized Metal Primer [affil links] should be a good answer for personal use. Good luck.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey


Q. I am building a mini ramp (half pipe) for skateboarding and I am going to be covering the ramp with 22 gauge galvanized steel. I have heard that a latex primer is best to use on galvanized steel for skateboarding because it adds more grip. Do you have any suggestions on a good latex primer for galvanized steel. Also I have heard you can clean the galvanized steel off with water/rubbing alcohol mix, would that work?

Thank you
Bryan

Bryan Young
Woodard - winston salem, North Carolina
September 20, 2012



A.

Hi, Bryan. A latex self-etching primer should be satisfactory.

If you put a top coat on it, avoid alkyd paints as they are incompatible with galvanizing.

Rubbing alcohol is not a very powerful solvent; I think scrub brushing with TSP would be far more effective in getting the metal clean before painting. Good luck.

Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
September 20, 2012




(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"