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







-----

Why the chromate conversion failure in 168 hrs salt spray



June 30, 2010

why the chromate conversion coating failure in 168 hr salt spray?

Chandramanipg Chandramanipg
manager in plating - Bangalore, Karnataka, India



First of two simultaneous responses -- July 6, 2010

There are any number of reasons and they cover the entire range from the parent material to the pre process to the process to the post process to the actual salt spray cabinet/material/operator.

Read some of the old posts at this site, on this subject. If you are using old (6 months or so) test panels, switch to new ones and the problem will probably go away.

Parts that have been "polished" with a steel rotary brush will probably never pass.

James Watts
- Navarre, Florida



Second of two simultaneous responses -- July 7, 2010

We need much more detail before anyone can consider giving you an answer. You need to tell us what your process is, step by step, what your analysis control is like and whether there have been any anomalies, what you were testing to, the test conditions (did they meet specification requirements?), what materials you are treating (are they castings, extrusions, machined parts?).

The above information I would consider to be a minimum to get any sense from us mere mortals.

Brian Terry
Aerospace - Yeovil, Somerset, UK


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