No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

Hard Anodize Tank Design

adv.
Goad 2nd contain


Q. What is the current state of the art for hardcoat tank design?

What materials are being used for tanks, cathodes, evaporators, refrigerants, and cooling fluids or brines?

Will these materials still be available and viable in twenty years?

Chris Jurey, Past-President IHAA
Luke Engineering & Mfg. Co. Inc.
supporting advertiser
Wadsworth, Ohio
luke banner
March 10, 2022



March 25, 2022

Chris-
Traditionally, Type III tanks have often been made from polypropylene copolymer, but there have been numerous problems with polypropylene that have emerged over the past few decades (flammability, loss of strength and other properties of time, oxidative chemical permeation etc.) so GOAD almost never recommends them as a first choice. A much better tank would be made from 316L stainless (or a carbon steel tank for lower cost) that is bonded with an HP Koroseal lining. In this case, the tank strength comes from the steel and the chemical resistance comes from the lining. GOAD is the long-time leader in Koroseal application. GOAD has been around since the 1950's and is positioned to be around for the next 20+ years. There are also higher end options available such as GOAD's SpaceTank(R) System.

Cathodes should be 6062 T6 Aluminum. Drew Nosti may comment about this.

As far as chilling, indirect glycol chilling is going to be the best. Regulators may continue to regulate older refrigerants out of existence, but there will always be some choice for chilling the glycol. Likewise, the glycol itself could see increased regulation but then some other alternative fluid would rise up to take its place. For the heat exchanger, an external 316L plate and frame exchanger is the best for larger tanks. The plates last relatively long on hard anodize applications at low temperatures, but they do need to be replaced after some years. Other exchanger types are also possible, but plate and frame are generally the most cost effective overall.

I hope this helps.

Jon Barrows
Jon Barrows, MSF, EHSSC
GOAD Company
supporting advertiser
Independence, Missouri
goadbanner4




(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  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"