My account: Login | Sign Up

Loading...

Thread: Coating for HF Alky Prefrac Charge Drum

Started 3 months ago by LISAEK

What coating should I use in a prefract charge drum in an HF alky unit? Contents include C3's, C4's, anhydrous HF at about 90 F. It is carbon steel and estimated long term corrosion rate is low (2 mpy), 3 mpy on acid outlet. Min/max temperature in the 75 - 115 F range. It is nearing end of life on the shell and I would like to prevent more corrosion if possible.

Site:	Eng-Tips Forums
Forum:	Corrosion engineering
Total authors:	4 authors
Total thread posts:	5 posts
Thread activity:	no new posts during last week
Domain info for:	eng-tips.com

Other posts in this thread:

Reply 1: Coating for HF Alky Prefrac Charge Drum

chrysa1975 replied 2 months, 4 weeks ago

Of the non-metallic materials, PTFE is wholly resistant to HF and hydrocarbons, but its use as a coating for repairs made in situ is virtually impossible because its polymerisation requires heat treatment under conditions which are hardly compatible with the facilities normally available when working on plant. Epoxy coatings do not withstand HF, even when present in traces. Also consult API RP ...

Size: 596 bytes
Customize: $Customize "<b>Reply 1</b>: Coating for HF Alky Prefrac Charge Drum :: Corrosion engineering :: Eng-Tips Forums"$

Reply 2: Coating for HF Alky Prefrac Charge Drum

rustbuster replied 2 months, 4 weeks ago

You might consider a flame spray or arc spray application, Alloy C276 if available. Good Luck

Size: 156 bytes
Customize: $Customize "<b>Reply 2</b>: Coating for HF Alky Prefrac Charge Drum :: Corrosion engineering :: Eng-Tips Forums"$

Reply 3: Coating for HF Alky Prefrac Charge Drum

TomEun replied 2 months, 3 weeks ago

Please find below. NACE Publication 5A171 (2007 Edition) NACE Conference Paper 01345/05574/07570 NiDI #10074

Size: 183 bytes
Customize: $Customize "<b>Reply 3</b>: Coating for HF Alky Prefrac Charge Drum :: Corrosion engineering :: Eng-Tips Forums"$

Reply 4: Coating for HF Alky Prefrac Charge Drum

LISAEK replied 1 month, 3 weeks ago

Everyone, Thank you for your advice. We will not be coating this drum at this time. We will install samples and evaluate during the next unit T/A.

Size: 231 bytes
Customize: $Customize "<b>Reply 4</b>: Coating for HF Alky Prefrac Charge Drum :: Corrosion engineering :: Eng-Tips Forums"$

Top contributing authors

Name

Posts

Related threads on "Eng-Tips Forums":

Pump Material for HF Alky Service

Pump Material for HF Alky Service

Pump Material for HF Alky Service

Looking for production company for Nikasil or NSC coating...

Looking for production company for Nikasil or NSC coating bores

Looking for production company for Nikasil or NSC coating bores

Boiler tube coating for anti slagging from lignite coal

Boiler tube coating for anti slagging from lignite coal

Boiler tube coating for anti slagging from lignite coal

Need liquid coating for exterior metal application

Need liquid coating for exterior metal application

Need liquid coating for exterior metal application

Related threads on other sites:

HF powder coating system

HF powder coating system

HF powder coating system

Thread profile page for "Coating for HF Alky Prefrac Charge Drum" on http://www.eng-tips.com. This report page is a snippet summary view from a single thread "Coating for HF Alky Prefrac Charge Drum", located on the Message Board at http://www.eng-tips.com. This thread profile page shows the thread statistics for: Total Authors, Total Thread Posts, and Thread Activity