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





-----

Paint isn't adhering to Aluminium





August 12, 2010

I am painting some aluminium components attach to engine. I am using etch primer but till uneven paint peel-off is observed. I am doing Iron phosphating and Oven dry at 110 °C >etch primer> TSA top coat.

Paint peeloff is not observed at all parts.

Can anyone suggest solution?

Nikhil Kute
Paint tech Engg - Mumbai, India



August 13, 2010

Hi Nikhil,

In order for iron phosphate to be successful on aluminum, the phosphating bath needs to contain fluoride. Without knowing anything else about your process, I would ask your supplier about the composition of the iron phosphate and make sure that you have a product that contains fluoride.

George Gorecki
- Naperville, Illinois



August 16, 2010

If you mean a two pack etch primer (base and catalyst) then it has been used as a stand alone pretreatment since 1940's. Try your coating system without the iron phos... it is not needed. Note after mixing base and catalyst wait 5-10 mins before using and only mix sufficient for that day...never try to use it on the following day.

Terry Hickling
Birmingham, United Kingdom


none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

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    -    ©1995-2023 finishing.com, Pine Beach, New Jersey, USA