Breathe easy! No registration or passwords; no maddening pop-up or floating ads :-)

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





-----

Chromium plating thickness per P-106 of MIL-STD-808




I have a requirement for chrome plating per finish P-106 of MIL-STD-808 (MIL-HDBK-808 [affil link]). This spec calls for a minimum final plate of .025 mm (~.001") chromium per QQ-C-320 Type I, Class 1. However, QQ-C-320 (FED QQ-C-320 [affil link])Class 1 says the minimum thickness should be .00001". So, I am wondering if this is a typo in MIL-STD-808 or if it should really be a thickness 100 times the minimum specified in QQ-C-320.

Robert Byrne
Aerospace contractor - Stamps, Arkansas, USA
September 2, 2010



September 7, 2010

Robert,

There is one very important phrase you missed out on the Class 1 thickness as specified in QQ-C-320 and that is "Unless otherwise specified". MIL-STD-808 is indeed calling up a thickness several factors higher than QQ-C-320. The minimum thickness called up in QQ-C-320 is what would normally be considered a "flash" coating, very thin, usually decorative rather than functional. A thickness of 0.001" is not uncommon for chromium plating, in fact it can be plated considerably thicker than that and often is when trying to refurbish parts.

Brian Terry
Aerospace - Yeovil, Somerset, UK




(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

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