Cement as a Tank Lining Material
Cement as a Tank Lining Material
(OP)
Portland cement is used extensively as a Pipe lining coating. Such coatings are only approx 8 mm thick and I hear that it is their shape that holds them in place.
Would a hand applied (trowelled) coating be any use for large tank linings. We have many large Carbon Steel tanks which need re-lining. They have an epoxy resin lining which is failing and contain potash salt slurry which is corrosive. They are difficult to get completely dry and maybe a cement lining would tolerate the damp walls and still have enough natural bond to remain in position. We even wondered about adding Zinc dust to create a water based zinc rich primer
Any comments will be much appreciated. ( I expect them all to be negative so please shout up.)
Would a hand applied (trowelled) coating be any use for large tank linings. We have many large Carbon Steel tanks which need re-lining. They have an epoxy resin lining which is failing and contain potash salt slurry which is corrosive. They are difficult to get completely dry and maybe a cement lining would tolerate the damp walls and still have enough natural bond to remain in position. We even wondered about adding Zinc dust to create a water based zinc rich primer
Any comments will be much appreciated. ( I expect them all to be negative so please shout up.)





RE: Cement as a Tank Lining Material
"I'm that dog who saw a rainbow, only none of the other dogs believed me." from "Kate and Leopold"
RE: Cement as a Tank Lining Material
Also, zinc powder in fresh concrete mix will react to form hydroxide and bubbles, I suspect a reaction like this:
Zn + 2H2O, @pH 13 --> Zn(OH)2 + H2(g)
Do the tanks need complete re-lining or just patching? You will need to find a resin compatible with the existing one & traces of moisture, and resistant to the potash slurry. What was used originally?
RE: Cement as a Tank Lining Material
regards
Luis
RE: Cement as a Tank Lining Material
Secondly all resins have a expansion rate about 7 times that of steel so in operational state there is a shrinkage or expansion force trying to disbond the lining.
This tank had extensive re-lining last year and it has failed , thats why I am looking at it now, hence my query.
Also a water based product is much easier to apply than a resin. However we are now setting up a few practical tests to see if cement bonds to blasted steel that is damp and salty so I'll update you on the results next week.
Thanks for input CM
RE: Cement as a Tank Lining Material
If you can get rid of all the resin and weld the steel supports to the ID, you should be OK.
"I'm that dog who saw a rainbow, only none of the other dogs believed me." from "Kate and Leopold"
RE: Cement as a Tank Lining Material
Good luck
RE: Cement as a Tank Lining Material