finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
(current
topics)
topic 10546

Epoxy resistant to HCL


 

I have a bewt which takes copper out of the process before it reaches the sewer. The tank is made of polypro plastic. My question is the tank contains a mixture of liquid of which one is hydracloric acid., this tank has a crack on the side, is there an epoxy on the market that is resistant to HCl ?

Carl Laudansky
- Canada


 

Hi Carl,

To answer your question, Yes but No.

Yes, there are epoxies that are HCl resistant. But NO, you sure won't be able to bond/glue/adhere the epoxy to that PP tank.

If you are inventive, if you know something about plastics, if the crack is small and won't get bigger, you could very carefully heat up the PP surface by 4" or so all around that crack and heat fuse some glass woven roving (preferably) or cloth ... and if it fused on properly, then you'd have a basis for applying a patch of epoxy (with glass cloth & mat) or use, for that matter, just a good acid resistant polyester resin which costs less and is easier to apply. The cloth/woven roving should have exposed fibres for getting a mechanical lock/bond. OK?

Another solution is to entirely cover the tank with a fibreglass overlay. Expensive.

Lastly, it seems that something is amiss for your PP to have a crack like that .... old tank exposed to sunlight, perhaps?

Cheapest solution is probably obtaining a new (rotationally moulded) Polyethylene tank as the only advantage that PP has is its higher temperature resistance. If it is outdoors you could get/order a std Pe tank with a black u.v. resistant color for a few bucks more.

...somewhat difficult to really recommend a solution when one doesn't have all the facts, eh? ie. tank size, location, age, sunlight exposure, welded areas (which might well crack if exposed to oxidizers), chemistry ie. surfactants, solvents, etc.

Have fun!

freeman newton portrait
Freeman Newton
White Rock, British Columbia, Canada

(It is our sad duty to
advise that Freeman passed away
April 21, 2012. R.I.P. old friend).




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 CURRENT 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 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.