netneut -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing has been free for 22 years,
but without net neutrality we could soon
cease to exist. Do us a solid, click on
the banner, and contact congress today!
topic 12063

ASTM D5894 correlation coefficient


I am going to do some tests with the ASTM D5894 [link by ed. to spec at TechStreet] cyclic salt spray/QUV test. There is a correlation coefficient of 0.699 with real life defined. How does this coefficient work?

Matias Kerkhofs
- Leuven, Belgium


Sounds to me like it works through precision without accuracy :-)

There is no relationship between spray hours and real life because the corrosion mechanisms are fundamentally different, with the result that some finishes that outperform others in the test cabinet cannot actually match them in real life. So a correlation coefficient can, at most, apply only to a specific coating, not coatings in general.

Ted Mooney, Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView This Week's 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

©1995-2017     -    Privacy Policy
How Google uses data when you visit this site.