Home /
Search 🔍
the Site

World's #1 finishing resource since 1989
No login needed: Chime right in

topic 8068

Media Blast or Chemical Pretreatment Better for Powder Coating?


I am looking to start up a small powder coating job shop. My question pertains to systems I have had quoted. Which pretreatment system has the broadest appeal and why? One system has a media blast system and the other has a chemical pretreatment system.

Tom Drake
- Charlotte, North Carolina


The answer to your question depends on a number of factors. However the main thing you will have to take into consideration is what kind of substrate you will be coating. If you are starting up a job shop and do not know this I would recommend the chemical pretreatment. A media blast system may be too aggressive for certain substrates and some systems can ingrain foreign objects (grease, oil) into the substrate rather than clean it. However there are a number of chemical pretreatments and you will have to look into the type of chemical treatment more carefully.

I'm sorry I could not give you a definite answer but I would require more information on your circumstances.

Drew Devlin
- North Lincolnshire

affil. link
Preparation of Metals for Painting

affil. link
"Phosphating of Metals"
by Werner Rausch
from Abe Books
info on Amazon


I feel the pretreatment chemical wash is the best way to go. If you will be doing a lot of different parts the media blast could hurt certain surfaces.

Good Luck! Sincerely,

Cliff Shephard
- Charlotte, North Carolina

May 18, 2010

Hi, Tom. Drew is right that we need to know what material you want to powder coat, but I think Cliff is right that chemical pretreatment is better because almost any metal you powder coat will require either a phosphate or a chromate conversion coating pretreatment for proper corrosion resistance. Good luck.


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

finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start 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:

Chemicals &
Consult'g, Train'g
& Software

About/Contact    -    Privacy Policy    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA