Home
 
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
SEARCH🔍
the Site
no_pop_no_spam2

World's top finishing resource since 1989
Chime right in - No login req'd

topic 29809

Blisters in the hardcoating process



2004

I am a quality manager at an finishing shop. I am looking for information on what causes blistering in the hardcoat process. The problem does not seem to be alloy specific. 2011 alloy and M1 alloy have both shown this appearance recently. I have also seen blistering on 7075 not within the last 4 years. Any guidance would be appreciated.

Thanks,

Timothy Berry
Anodizing Shop. - Detroit, Michigan, USA


2004

Too thick hard coat on inside curves will crash the growth and fracture. Anodizing over work hardened surfaces will exfoliate if too heavy thickness Anodizing over embedded trash from steel shot peening, time savings, tumbling, etc will exfoliate.

Anodizing over partially intermittent old aluminum oxide left behind by inadequate deoxidation and usually following heat treatment, that too, will exfoliate.

robert probert



Robert H Probert
Robert H Probert Technical Services
supporting advertiser
Garner, North Carolina
probertbanner

none
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:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


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