Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site

Problem? Solution? Chime right in!
(perhaps the world's last 'no registration' site)

-----

"Plating that withstands hydrogen chloride acid"



March 29, 2017

Q. Hi, I am looking for a steel fastener to be plated to be able to withstand hydrogen chloride acid test. We do not require submersion of the parts in the acid but rather let it be exposed to the evaporation of the chemicals and see how long will it take to strip off the coating.

I've brought in some samples (zinc plated with JS500 sealer, Dacromet) yet have not had positive results yet.

I am wondering if someone can share some insight as of what type of plating is the best for this type of application?

Thanks!
Jade

Jade Goard
- Sheboygan Falls, Wisconsin
^


March 2017

A. Hi Jade. Sorry, I don't really understand. Few platings will have significant resistance to HCl vapors. Other than gold plating, few materials are fully resistant.

Do you have an ASTM, MIL, or other spec for this test procedure so I can better understand what you are talking about? Thanks.

Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
Aloha -- an idea worth spreading
finishing.com - Pine Beach, New Jersey
^


March 30, 2017

Q. Hi Ted, thanks for your response.

Unfortunately we do not use ASTM or Mil to specify the plating. We came up with this Hydrogen Chloride acid vapor test as it simulates what the part will be put up to the test in the real life.

We put salt spray 1000 hours on the print but it is treated more like a benchmark. And there seems to be no clear correlation between the salt spray test result and our in house Hydrogen Chloride acid vapor test.

Not sure if my reply helps clarify the situation or it is still as clear as mud...

Jade Goard [returning]
- Sheboygan Falls, Wisconsin
^

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 SEARCH for Threads about ... My Topic Not Found: Start 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    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA