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





-----

Chrome plating on cylinder rod of wheel loader bubbled/blistered on dealer's lot





May 21, 2012

Q. Cylinder rod was coated with chrome plating. After assembly on the wheel loader, the machine has parked in the open air for almost one year in the dealer's lot without sale out.

Dealer found the chrome plating layer corroded. The strange thing is the plating layer did not corrode directly. The bubble on the surface emerged first and then the bubbles exploded -- the base metal is corroded.

Does any expert know why the bubble happened?

Joey Yan
- China



May 22, 2012

A. Hi Joey.

Chrome is more electrochemically noble than steel is, so if there is a pinhole or porosity, it is possible for corrosion to start in the substrate, and then cause a blister.

The hydraulic oil on a cylinder rod offers some temporary corrosion resistance, such that a loader which is operated every few days probably exhibits significantly better corrosion resistance than one where the oil was washed off, early on, and the rod sat exposed to sun and rain for months. You might check the operating manual and see if it has any comment about periodically operating the equipment, or protecting it from corrosion if unused for long periods. Best of luck with the problem.

Regards,

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


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