-- The Home Page of the Finishing Industry

on this site
current topics
Live! From beautiful Pine Beach New Jersey: Welcome to the world's most popular metal finishing website

topic 54854

Avoiding peeling in painting aluminium castings for motorbikes

April 21, 2010

Motorbikes components in aluminium casting alloys suffer peeling of the present coating (one layer of polyester). The components works at about 130°C and are exposed to weathering and pollution. What kind of coating system may be recommended? We were thinking to silicon powder coating applied over a surface prepared with conversion coating.

Andrea Vecchi
engineering services - Carpi, Italy

April 21, 2010

Hi, Andrea; chromate conversion coating is ideal. Look into RoHS-compatible trivalent chromates per Mil-DTL-5541 [link is to free spec at Defense Logistics Agency,].


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

April 21, 2010

For years we supplied 500 kls per month to a company coating aluminium casting for motor car cylinder head covers. I would imagine that epoxy although it tends to chalk (don't motorbike enthusiast always clean their bikes on a regular basis?) has superior adhesion and is the only powder you can grind back to the metal (show off lettering) without edge cracking and in addition has excellent corrosion resistance.

Terry Hickling
Birmingham, United Kingdom

If you have a question in mind which seems off topic, please Search the Site

ADD a Q, A, or Comment on THIS topic START an UNRELATED topicView CURRENT HOT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2019, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.